You would like to know whether the versions of Sendmail and Postfix that are bundled with PureMessage support the Simple Authentication and Security Layer (SASL) protocol.
Sophos product and version
PureMessage for UNIX 5.4 and above
UNIX and Linux
Since PureMessage version 5.3.1, the bundled version of Postfix has included support for the Dovecot SASL protocol (Cyrus SASL is not supported).
Please note, however, that the configuring, testing, and implementation of SASL for Postfix is not within the scope of Sophos Technical Support. If you need assistance, please contact our Professional Services Team: http://www.sophos.com/support/services/proservices.html.
You can find steps to configure SMTP Authentication with MTA IP Blocker in this KB article: http://www.sophos.com/support/knowledgebase/article/40280.html.
SASL is not supported and is not compiled into the version of Sendmail that's bundled with PureMessage for UNIX. Feel free to use an alternative version of Sendmail. However, please note that IP Blocker will require extra configuration if you don't use the bundled version. Also, you will not be able to use the Web User Interface to manage Sendmail.