If you did not select either sendmail or Postfix as the mail transfer agent (MTA) during PureMessage installation, use the instructions below to set up PureMessage to work with an existing MTA. This section describes configuring PureMessage for external versions of sendmail, Sendmail Switch and Postfix.
If you are using Oracle Communications Messaging Exchange Server, you can configure a direct connection with the PureMessage milter as described in "Configuring PureMessage for Oracle Communications Messaging Exchange Server" in the Sophos Knowledgebase.