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Plan to automatically configure user accounts in Outlook 2010

Published: May 16, 2012

Autodiscover and Common Settings Discover are the two discovery mechanisms that can automatically configure user accounts in Microsoft Outlook 2010.

In this article:

Overview

As with Microsoft Office Outlook 2007, Outlook 2010 includes the ability to automatically configure user accounts. Outlook 2010 uses one of two discovery mechanisms to automatically configure accounts: Autodiscover and Common Settings Discover.

Autodiscover is a standards-based XML file that can be configured by an administrator for an Internet service provider (ISP) or a corporation, or dynamically generated by a service, such as the Client Access server role in Microsoft Exchange Server 2007 or Microsoft Exchange Server 2010. This is the recommended mechanism for settings discovery, because it provides optimal performance. It also minimizes the possibility of configuration error on the client computer, because the settings are defined explicitly and deliberately by the administrator of the mail servers.

Common Settings Discover is less configurable, and less sophisticated, but configures most mail servers around the world based on common settings. It tries encrypted connections first. If these connections fail, it prompts the user to try connections that are not encrypted, and tries the same servers again without encryption. Many ISPs today do not require encryption, but have it enabled so that users can configure their accounts by using encryption.

For information about how to deploy and manage the Autodiscover service for Exchange Server 2007, see Overview of Autodiscover Service: Exchange 2007 Help (http://go.microsoft.com/fwlink/p/?linkId=183290). For Exchange Server 2010, see Understanding the Autodiscover Service: Exchange 2010 Help (http://go.microsoft.com/fwlink/p/?linkId=183289).

Using Autodiscover with DNS

Autodiscover in Outlook 2010 is an XML file that is put in one of two locations, based on the domain name provided by the user. For the Internet, Autodiscover relies on the Domain Name System (DNS) to find the XML file. The XML file location is based on the e-mail address that the user provides. For example, if barbara@contoso.com is entered as the user’s e-mail address, Outlook 2010 looks for the XML file in the following locations and in the following order:

  1. https://contoso.com/autodiscover/autodiscover.xml

  2. https://autodiscover.contoso.com/autodiscover/autodiscover.xml

If your company also has a Web site at the root domain (for example, contoso.com), the second option (the Autodiscover “host (A) resource record” solution) lets you run the Web server and the Autodiscover file or service on separate servers. For smaller companies, the additional management of having separate DNS records can be ignored, and a single server can run both the Web site and the Autodiscover service (for example, the option 1 listed previously).

The connection must be established by using Secure Sockets Layer (SSL), and a valid SSL certificate must be present. SSL is required because a company or an Internet service provider (ISP) could choose to provide only encrypted access to their mail servers. In this scenario, if Outlook 2010 first checks non-SSL locations or allows failover to a non-SSL location, and a user types an e-mail address and password in a vulnerable security situation such as a man-in-the-middle attack, the automatic configuration service in Outlook 2010 could weaken security by being the weakest link in the connection chain if a non-SSL connection is allowed. Without an encrypted connection, the automatic configuration service could allow a non-encrypted Web site to configure mail server settings and allow authentication with a user name and password to the non-encrypted site. Instead, SSL is required by the Autodiscover protocol to maintain the compatibility with companies and ISPs that demand secure configuration routines.

However, if a company or an ISP chooses to host many e-mail domains, Outlook 2010 can follow an HTTP redirect or DNS Service (SRV) resource record (this DNS SRV record lookup functionality is included in Office Outlook 2007 Service Pack 1 and later versions) that is not encrypted to a secure Web site that stores the settings. For example, suppose that contoso.com is a hosted e-mail domain, and that the hosting service runs the Autodiscover file at hoster.com. In this scenario, the autodiscover prefix can be used by the hosting company to direct Outlook 2010 to a secure site that contains the Autodiscover settings.

  • HTTP redirect: http://autodiscover.contoso.com/autodiscover/autodiscover.xml --> redirects to https://autodiscover.hoster.com/autodiscover/autodiscover.xml

  • DNS SRV: _autodiscover._tcp.contoso.com --> points to https://autodiscover.hoster.com/autodiscover/autodiscover.xml

In both examples, users will see a warning dialog box in Outlook 2010 stating that they are being redirected to autodiscover.hoster.com for server settings. The dialog box provides the option to allow the redirection and lets users ignore future prompts about the redirect site (in this example, autodiscover.hoster.com).

Autodiscover protocol details

In a domain environment that has Service Connection Point (SCP) configured, an SCP lookup will be performed first. Otherwise, the first connection attempt is always an HTTPS POST verb to domain, where the user has entered the e-mail address e-mail@domain. If the settings are successfully retrieved, no additional network calls are made. If the settings are not retrieved, an HTTPS POST verb is performed to autodiscover.domain. If settings are not retrieved from this site, a final HTTP GET and DNS SRV record lookup is performed only to the autodiscover.domain site. This HTTP GET and DNS SRV record lookup can only redirect to a secure site. (If settings are present at the HTTP location, Outlook 2010 will not configure them because the connection was not encrypted.)

Outlook 2010 can follow up to 10 redirects of any type. That is, you can follow an HTTPS POST redirect, HTTP GET redirect, or use the Autodiscover redirect XML schema tags detailed later in this article. After 10 redirections cannot obtain the settings, the settings discovery fails.

Static XML vs. Web service XML

The POST verb is used so that Outlook 2010 can issue a request to a dynamic Web service, such as the Client Access server role in Exchange 2007 and Exchange Server 2010. However, if a static XML file is sufficient or if you are not running an Autodiscover Web service, the XML response returned in a customized 405 (POST verb not supported) response from any Web server will also work as the configuration XML used by Outlook 2010.

Using Autodiscover locally

It is possible to configure the registry on your computer to look for a local XML file that defines the server settings. However, we strongly recommend that the settings be hosted on a live server instead so that they can be easily updated. For testing purposes, adding entries to the registry can force Outlook 2010 to use local XML files to configure an e-mail domain that is not configured on the server. The server overrides the local XML for better security and configuration control.

For example, to provide contoso.com e-mail address settings from a local XML file, you could configure the following registry value:

[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Autodiscover] "contoso.com"="%PROGRAMFILES%\Microsoft Office\Office14\contoso.xml"

In this example, the XML settings file is located here: %PROGRAMFILES%\Microsoft Office\Office14\contoso.xml. A sample XML settings file is provided later in this article.

Precedence for XML settings

Outlook 2010 configures the server type based on the order in which servers are defined in the Autodiscover XML settings file. For example, if a mail service provider enables users to log on by using both the POP3 protocol and the IMAP protocol, but prefers that users use the POP3 protocol, the POP3 settings should be listed first in the Autodiscover file.

Autodiscover transaction summary

The order of operations for Autodiscover settings discovery in Outlook 2010 is summarized as follows:

  1. Automatically retrieve the e-mail address from the Active Directory directory service if the computer is joined to a domain.

  2. Retrieve the name of the Exchange Server computer if found, and store the name for later.

  3. Look for Service Connection Point (SCP) objects or SCP pointer objects that correspond to the user’s e-mail address, and find the correct Autodiscover server to connect to. Then,, connect to the server and retrieve the settings.

  4. If the previous step fails, try DNS discovery of Autodiscover XML (allowing for 10 redirects).

    1. HTTPS POST: https://domain/autodiscover/autodiscover.xml

    2. HTTPS POST: https://autodiscover.domain/autodiscover/autodiscover.xml

    3. HTTP GET: http://autodiscover.domain/autodiscover/autodiscover.xml (only to follow redirects, not to obtain settings)

    4. DNS SRV lookup: _autodiscover._tcp.domain (only to follow the redirect to which the SRV resource record points)

  5. If the previous step fails, try local XML discovery and use the XML found on the local computer, if applicable.

  6. If the previous step fails but the name of the Exchange Server computer is found in step 2, configure the Exchange account based on the name of the Exchange Server computer.

  7. If the previous step is not applicable, try Common Settings Discover, as described in Common Settings Discover later in this article.

The Autodiscover XML schema

The XML schema for Autodiscover in Outlook 2010 is described in the following sections.

POST request sent by Outlook

When retrieving XML settings to configure an e-mail account, Outlook 2010 always uses a POST verb. The HTTP POST is as shown in the following code sample.

<!-- REQUEST TO SERVER. In HTTP POST DATA -->
<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/requestschema/2006">
<Request>
<AcceptableResponseSchema>http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a</AcceptableResponseSchema>

<!-- EMailAddress: Optional
This tag indicates the user’s email address.
-->
<EMailAddress>JohnDoe@sample.com</EMailAddress>
</Request>
</Autodiscover>

XML response schema

A server might respond to an Outlook 2010 POST in several ways. If a static XML file is sufficient, such as a POP3 service that is provided by an Internet service provider (ISP) where the server names are the same for all users, a customized 405 POST error message that has the XML content will be sufficient. If an Autodiscover service is running, the response might be dynamically calculated based on the user’s POST shown in the previous section. Regardless, the response schema is as shown in the following code sample.

<!-- RESPONSE FROM THE SERVER -->
<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
<!-- Response: Required
This tag serves as an indication that the retrieved XML is an Autodiscovery Response
-->
<Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
<!-- User: Optional
This tag gives user-specific information.  Autodiscover must be UTF-8 encoded.
-->
<User>
<!-- DisplayName: Optional
The server may have a good formal display name.  The client can decide to accept it or change it.  This will save the user time in the default case.
-->
<DisplayName>John Doe</DisplayName>
</User>

<!-- Account: Required
This tag specifies the type of account, such as Email vs Newsgroups, vs SIP server, etc.
-->
<Account>
<!-- AccountType: Required
This value indicates the type of the account.
VALUES:
email: The values under this Account tag indicate configuration settings for an email server.
nntp: The values under this Account tag indicate configuration settings for a NNTP server. (not used by Outlook 2007)
-->
<AccountType>email | nntp</AccountType>

<!-- Action: Required
This value indicates if the goal of this account results is to provide the settings or redirect to another web server that can provide results.
VALUES:
redirectUrl: If this value is specified, then the URL tag will specify the http: or https: URL containing the Autodiscover results to be used.  In order to prevent the server from being able to send the client into an infinite loop, the client should stop redirecting after 10 redirects.
redirectAddr: If this value is specified, then the XML tag will specify the e-mail address that Outlook should use to execute Autodiscover again.  In other words, the server is telling the client that the e-mail address the client should really be using for Autodiscover is not the one that was posted, but the one specified in this tag. 
settings: If this value is specified, then the XML will contain the settings needed to configure the account.  The settings will primarily be under the PROTOCOL tag.
-->
<Action>redirectUrl | redirectAddr | settings</Action>

<!-- RedirectUrl: Required if ACTION tag has value of 'redirectUrl'. Otherwise this tag must not exist.
The value will be a https: URL that the client should use to obtain the Autodiscover settings or a http: URL that the client should use for further redirection.
-->
<RedirectUrl>redirect.URL</RedirectUrl>

<!-- RedirectAddr: Required if ACTION tag has value of 'redirectAddr'. Otherwise this tag must not exist.
The value will be an email address that the client should use to rediscover settings using the Autodiscover protocol.
-->
<RedirectAddr>email@address</RedirectAddr>

<!-- Image: Optional
This is a JPG picture to brand the ISP configuration experience with. The client can choose whether or not they download this picture to display. (not used by Outlook 2007)
-->
<Image>http://path.to.image.com/image.jpg</Image>

<!-- ServiceHome: Optional
This is a link to the ISP’s Home Page. The client can choose whether or not they expose this link to the user. (not used by Outlook 2007)
-->
<ServiceHome>http://web.page.com</ServiceHome>

<!-- Protocol: Required if ACTION tag has value of 'settings'. Otherwise, this tag must not exist.
The tag encloses the specifications for a single account type.  The list of Protocol tags are in order of preference of the server.  The client may over ride the preference.
-->
<Protocol>
<!-- TYPE: Required.
The value here specifies what kind of mail account is being configured.
POP3: The protocol to connect to this server is POP3. Only applicable for AccountType=email.
SMTP: The protocol to connect to this server is SMTP. Only applicable for AccountType=email.
IMAP: The protocol to connect to this server is IMAP. Only applicable for AccountType=email.
DAV: The protocol to connect to this server is DAV. Only applicable for AccountType=email.
WEB: Email is accessed from a web browser using an URL from the SERVER tag. Only applicable for AccountType=email. (not used by Outlook 2007)
NNTP: The protocol to connect to this server is NNTP. Only applicable for AccountType=nntp. (not used by Outlook 2007)
-->
<Type>POP3 | SMTP | IMAP | DAV | WEB | NNTP</Type>

<!-- ExpirationDate: Optional.
The value here specifies the last date which these settings should be used. After that date, the settings should be rediscovered via Autodiscover again. If no value is specified, the default will be no expiration.
-->
<ExpirationDate>YYYYMMDD</ExpirationDate>

<!-- TTL: Optional.
The value here specifies the time to live in hours that these settings are valid for. After that time has elapsed (from the time the settings were retrieved), the settings should be rediscovered via Autodiscovery again. A value of 0 indicates that no rediscovery will be required. If no value is specified, the default will be a TTL of 1 hour.
-->
<TTL>168</TTL>

<!-- Server: Required.
The value here specifies the name of the mail server corresponding to the server type specified above.
For protocols such as POP3, SMTP, IMAP, or NNTP, this value will be either a hostname or an IP address.
For protocols such as DAV or WEB, this will be an URL.
-->
<Server>mail.contoso.com</Server> <!--IP Addr or DNS name of server-->

<!-- Port: Optional.
The value specifies the Port number to use.  If no value is specified, the default settings will be used depending on the mail server type.  This value is not used if the SERVER tag contains an URL.
-->
<Port>110</Port>

<!-- LoginName: Optional.
This value specifies the user's login.  If no value is specified, the default will be set to the string preceding the '@' in the email address.  If the Login name contains a domain, the format should be <Username>@<Domain>.  Such as JoeUser@SalesDomain.
-->
<LoginName>johndoe</LoginName>

<!-- DomainRequired: Optional.  Default is off.
If this value is true, then a domain is required during authentication.  If the domain is not specified in the LOGINNAME tag, or the LOGINNAME tag was not specified, the user will need to enter the domain before authentication will succeed.
-->
<DomainRequired>on | off</DomainRequired>

<!-- DomainName: Optional.
This value specifies the user's domain. If no value is specified, the default authentication will be to use the e-mail address as a UPN format <Username>@<Domain>. Such as JoeUser@SalesDomain.
-->
<DomainName></DomainName>

<!-- SPA: (Secure Password Authentication) Optional.
This value specifies whether or not secure password authentication is needed.
If unspecified, the default is set to on.
-->
<SPA>on | off</SPA>

<!-- SSL: Optional.
This value specifies whether secure login is needed.
If unspecified, the default is set to on.
-->
<SSL>on | off</SSL>

<!-- AuthRequired: Optional.
This value specifies whether authentication is needed (password).
If unspecified, the default is set to on.
-->
<AuthRequired>on | off</AuthRequired> <!-- Optional: Is Authentication required? -->

<!-- UsePOPAuth: Optional.
This value can only be used for SMTP types.
If specified, then the authentication information provided for the POP3 type account will also be used for SMTP.
-->
<UsePOPAuth>on | off</UsePOPAuth>

<!-- SMTPLast: Optional.  Default is off.
If this value is true, then the SMTP server requires that email be downloaded before sending email via the SMTP server.  This is often required because the SMTP server verifies that the authentication succeeded when downloading email.
-->
<SMTPLast>on | off</SMTPLast>
</Protocol>
</Account>
</Response>
</Autodiscover>

Sample XML responses

The XML response that is returned depends on the configuration defined by the ISP.

ISP with POP3 and SMTP service

The following XML file would be configured as a custom 405 error response at either https://contoso.com/autodiscover/autodiscover.xml or https://autodiscover.contoso.com/autodiscover/autodiscover.xml.

<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
<Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
<Account>
<AccountType>email</AccountType>
<Action>settings</Action>
<Protocol>
<Type>POP3</Type>
<Server>mail.contoso.com</Server>
<Port>995</Port>
<DomainRequired>off</DomainRequired>
<SPA>off</SPA>
<SSL>on</SSL>
<AuthRequired>on</AuthRequired>
</Protocol>
<Protocol>
<Type>SMTP</Type>
<Server>mail.contoso.com</Server>
<Port>587</Port>
<DomainRequired>off</DomainRequired>
<SPA>off</SPA>
<SSL>on</SSL>
<AuthRequired>on</AuthRequired>
<UsePOPAuth>on</UsePOPAuth>
<SMTPLast>on</SMTPLast>
</Protocol>
</Account>
</Response>
</Autodiscover>

ISP with POP3, IMAP, and SMTP services with POP3 preference for clients

The following XML file would be configured exactly as described in the previous section.

<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
<Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
<Account>
<AccountType>email</AccountType>
<Action>settings</Action>
<Protocol>
<Type>POP3</Type>
<Server>mail.contoso.com</Server>
<Port>995</Port>
<DomainRequired>off</DomainRequired>
<SPA>off</SPA>
<SSL>on</SSL>
<AuthRequired>on</AuthRequired>
</Protocol>
<Protocol>
<Type>IMAP</Type>
<Server>mail.contoso.com</Server>
<Port>993</Port>
<DomainRequired>off</DomainRequired>
<SPA>off</SPA>
<SSL>on</SSL>
<AuthRequired>on</AuthRequired>
</Protocol>
<Protocol>
<Type>SMTP</Type>
<Server>mail.contoso.com</Server>
<Port>587</Port>
<DomainRequired>off</DomainRequired>
<SPA>off</SPA>
<SSL>on</SSL>
<AuthRequired>on</AuthRequired>
<UsePOPAuth>on</UsePOPAuth>
<SMTPLast>on</SMTPLast>
</Protocol>
</Account>
</Response>
</Autodiscover>

XML redirect to a common XML file location

To redirect users to a common XML file location, the following XML file should be configured at a hosted domain location, at a URL that is not encrypted. By using this XML file, a message is displayed to users explaining that they are being redirected to another site for Autodiscover settings.

For example, if the hosted domain location was hoster.com providing contoso.com e-mail addresses, the file would be located at http://autodiscover.contoso.com/autodiscover/autodiscover.xml. The contents of the file, in this example, would be as shown in the following code sample.

<?xml version="1.0" encoding="utf-8" ?>
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
<Response xmlns="http://schemas.microsoft.com/exchange/autodiscover/outlook/responseschema/2006a">
<Account>
<AccountType>email</AccountType>
<Action>redirectUrl</Action>
<RedirectUrl>https://autodiscover.hoster.com/autodiscover/autodiscover.xml</RedirectUrl>
</Account>
</Response>
</Autodiscover>

Users can instead be redirected by configuring an ordinary HTTP 302 redirect at the source location. Outlook 2010 follows both 302 redirects and redirectUrl tags in an XML response.

Note that the XML file contents for all Autodiscover responses must be named Autodiscover.xml.

Common Settings Discover

If the required settings for automatically configuring a user account in Outlook 2010 cannot be found by the methods described in the previous Autodiscover sections, a fallback algorithm is used to detect servers by using common names and well-known ports.

In Outlook 2010, the automatic configuration of a Webmail account will set the account type to IMAP by default for IMAP-supported Webmail accounts such as Google Gmail. If users prefer POP3 settings, they can manually adjust the protocol settings after the settings are determined by Outlook 2010 by selecting the Manually configure server settings option in the Add New Account dialog box. To make this selection straightforward for users, mail service providers that provide both POP3 and IMAP protocols should use the same server names for each protocol. Then, the user needs only to change a selection box, switching from IMAP to POP3.

Outlook 2010 tries a variety of incoming and outgoing server settings in parallel to maximize performance and minimize wait time for the user. The settings that Outlook 2010 attempts to configure for users are listed in the following tables. All encrypted settings are tried first, and mutually exclusively. Then, settings that are not encrypted are tried, if the user consents.

IMAP settings

First, encrypted settings are tried. For an IMAP server, the connection permutations are as shown in the following table.

Server User name Port TLS/SSL SPA

mail.domain

email@domain

993

SSL

SPA

email@domain

993

SSL

no SPA

email@domain

993

TLS

SPA

email@domain

993

TLS

no SPA

email@domain

143

SSL

SPA

email@domain

143

SSL

no SPA

email@domain

143

TLS

SPA

email@domain

143

TLS

no SPA

email

993

SSL

SPA

email

993

SSL

no SPA

email

993

TLS

SPA

email

993

TLS

no SPA

email

143

SSL

SPA

email

143

SSL

no SPA

email

143

TLS

SPA

email

143

TLS

no SPA

imap.domain

email@domain

993

SSL

SPA

email@domain

993

SSL

no SPA

email@domain

993

TLS

SPA

email@domain

993

TLS

no SPA

email@domain

143

SSL

SPA

email@domain

143

SSL

no SPA

email@domain

143

TLS

SPA

email@domain

143

TLS

no SPA

email

993

SSL

SPA

email

993

SSL

no SPA

email

993

TLS

SPA

email

993

TLS

no SPA

email

143

SSL

SPA

email

143

SSL

no SPA

email

143

TLS

SPA

email

143

TLS

no SPA

domain

email@domain

993

SSL

SPA

email@domain

993

SSL

no SPA

email@domain

993

TLS

SPA

email@domain

993

TLS

no SPA

email@domain

143

SSL

SPA

email@domain

143

SSL

no SPA

email@domain

143

TLS

SPA

email@domain

143

TLS

no SPA

email

993

SSL

SPA

email

993

SSL

no SPA

email

993

TLS

SPA

email

993

TLS

no SPA

email

143

SSL

SPA

email

143

SSL

no SPA

email

143

TLS

SPA

email

143

TLS

no SPA

Next, permutations that are not encrypted are tried, after the user is asked to continue with connection attempts that are not encrypted. The IMAP settings that are not encrypted that Outlook 2010 attempts to configure are as shown in the following table.

Server User name Port TLS/SSL SPA

mail.domain

email@domain

143

Clear

SPA

email@domain

143

Clear

no SPA

email

143

Clear

SPA

email

143

Clear

no SPA

imap.domain

email@domain

143

Clear

SPA

email@domain

143

Clear

no SPA

email

143

Clear

SPA

email

143

Clear

no SPA

domain

email@domain

143

Clear

SPA

email@domain

143

Clear

no SPA

email

143

Clear

SPA

email

143

Clear

no SPA

POP3 settings

First, encrypted settings are tried. For a POP3 server, the connection permutations are as shown in the following table.

Server User name Port TLS/SSL SPA

mail.domain

email@domain

995

SSL

SPA

email@domain

995

SSL

no SPA

email@domain

995

TLS

SPA

email@domain

995

TLS

no SPA

email@domain

110

SSL

SPA

email@domain

110

SSL

no SPA

email@domain

110

TLS

SPA

email@domain

110

TLS

no SPA

email

995

SSL

SPA

email

995

SSL

no SPA

email

995

TLS

SPA

email

995

TLS

no SPA

email

110

SSL

SPA

email

110

SSL

no SPA

email

110

TLS

SPA

email

110

TLS

no SPA

pop3.domain

email@domain

995

SSL

SPA

email@domain

995

SSL

no SPA

email@domain

995

TLS

SPA

email@domain

995

TLS

no SPA

email@domain

110

SSL

SPA

email@domain

110

SSL

no SPA

email@domain

110

TLS

SPA

email@domain

110

TLS

no SPA

email

995

SSL

SPA

email

995

SSL

no SPA

email

995

TLS

SPA

email

995

TLS

no SPA

email

110

SSL

SPA

email

110

SSL

no SPA

email

110

TLS

SPA

email

110

TLS

no SPA

pop.domain

email@domain

995

SSL

SPA

email@domain

995

SSL

no SPA

email@domain

995

TLS

SPA

email@domain

995

TLS

no SPA

email@domain

110

SSL

SPA

email@domain

110

SSL

no SPA

email@domain

110

TLS

SPA

email@domain

110

TLS

no SPA

email

995

SSL

SPA

email

995

SSL

no SPA

email

995

TLS

SPA

email

995

TLS

no SPA

email

110

SSL

SPA

email

110

SSL

no SPA

email

110

TLS

SPA

email

110

TLS

no SPA

domain

email@domain

995

SSL

SPA

email@domain

995

SSL

no SPA

email@domain

995

TLS

SPA

email@domain

995

TLS

no SPA

email@domain

110

SSL

SPA

email@domain

110

SSL

no SPA

email@domain

110

TLS

SPA

email@domain

110

TLS

no SPA

email

995

SSL

SPA

email

995

SSL

no SPA

email

995

TLS

SPA

email

995

TLS

no SPA

email

110

SSL

SPA

email

110

SSL

no SPA

email

110

TLS

SPA

email

110

TLS

no SPA

Next, permutations that are not encrypted are tried, after the user is asked to continue with connection attempts that are not encrypted. The POP3 settings that are not encrypted that Outlook 2010 attempts to configure are as shown in the following table.

Server User name Port TLS/SSL SPA

mail.domain

email@domain

110

Clear

SPA

email@domain

110

Clear

no SPA

email

110

Clear

SPA

email

110

Clear

no SPA

pop3.domain

email@domain

110

Clear

SPA

email@domain

110

Clear

no SPA

email

110

Clear

SPA

email

110

Clear

no SPA

pop.domain

email@domain

110

Clear

SPA

email@domain

110

Clear

no SPA

email

110

Clear

SPA

email

110

Clear

no SPA

domain

email@domain

110

Clear

SPA

email@domain

110

Clear

no SPA

email

110

Clear

SPA

email

110

Clear

no SPA

SMTP settings

First, encrypted settings are tried. For an SMTP server, the connection permutations are as shown in the following table.

Server User name Port TLS/SSL SPA

mail.domain

email@domain

587

SSL

SPA

email@domain

587

SSL

no SPA

email@domain

587

TLS

SPA

email@domain

587

TLS

no SPA

email@domain

25

SSL

SPA

email@domain

25

SSL

no SPA

email@domain

25

TLS

SPA

email@domain

25

TLS

no SPA

email

587

SSL

SPA

email

587

SSL

no SPA

email

587

TLS

SPA

email

587

TLS

no SPA

email

25

SSL

SPA

email

25

SSL

no SPA

email

25

TLS

SPA

email

25

TLS

no SPA

Anonymous

587

SSL

not applicable

Anonymous

587

TLS

not applicable

Anonymous

25

SSL

not applicable

Anonymous

25

TLS

not applicable

smtp.domain

email@domain

587

SSL

SPA

email@domain

587

SSL

no SPA

email@domain

587

TLS

SPA

email@domain

587

TLS

no SPA

email@domain

25

SSL

SPA

email@domain

25

SSL

no SPA

email@domain

25

TLS

SPA

email@domain

25

TLS

no SPA

email

587

SSL

SPA

email

587

SSL

no SPA

email

587

TLS

SPA

email

587

TLS

no SPA

email

25

SSL

SPA

email

25

SSL

no SPA

email

25

TLS

SPA

email

25

TLS

no SPA

Anonymous

587

SSL

not applicable

Anonymous

587

TLS

not applicable

Anonymous

25

SSL

not applicable

Anonymous

25

TLS

not applicable

domain

email@domain

587

SSL

SPA

email@domain

587

SSL

no SPA

email@domain

587

TLS

SPA

email@domain

587

TLS

no SPA

email@domain

25

SSL

SPA

email@domain

25

SSL

no SPA

email@domain

25

TLS

SPA

email@domain

25

TLS

no SPA

email

587

SSL

SPA

email

587

SSL

no SPA

email

587

TLS

SPA

email

587

TLS

no SPA

email

25

SSL

SPA

email

25

SSL

no SPA

email

25

TLS

SPA

email

25

TLS

no SPA

Anonymous

587

SSL

not applicable

Anonymous

587

TLS

not applicable

Anonymous

25

SSL

not applicable

Anonymous

25

TLS

not applicable

Next, permutations that are not encrypted are tried, after the user is asked to continue with connection attempts that are not encrypted. The SMTP settings that are not encrypted that Outlook 2010 attempts to configure are as shown in the following table.

Server User name Port TLS/SSL SPA

mail.domain

email@domain

25

Clear

SPA

email@domain

25

Clear

no SPA

email

25

Clear

SPA

email

25

Clear

no SPA

Anonymous

25

Clear

not applicable

smtp.domain

email@domain

25

Clear

SPA

email@domain

25

Clear

no SPA

email

25

Clear

SPA

email

25

Clear

no SPA

Anonymous

25

Clear

not applicable

domain

email@domain

25

Clear

SPA

email@domain

25

Clear

no SPA

email

25

Clear

SPA

email

25

Clear

no SPA

Anonymous

25

Clear

not applicable

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