On Wed, 20 May 2009, Matt Hersant wrote: > I'm having problems with spam for users who forge the sender to appear as > one of my domains. The spam is coming from an external mail server. Is > there anything I can add to my main.cf to combat this? Any suggestions are > appreciated.
Please include an appropriate Subject: header with problem reports; and the output of 'postconf -n' is preferred instead of main.cf snippets. To prevent envelope senders using your domain from an external mail server, use a check_sender_access map to REJECT them. Make sure to permit your networks and SASL authenticated senders before doing this. And depending on your configuration and requirements, this may cause some unwanted side-effects. Search the archives of this mailing list for context. -- Sahil Tandon <[email protected]>
