I use Suse Openexchange as our mail server and I have amavis installed for virus scanning and spamassassin.
I have a problem where when people send mail using SMTP Auth spamassassin penalises them because they are sending from a dynamic IP address etc... Currently I am having to whitelist their addresses which also allows some spam through. How do other people get around this problem? I can't see a way of getting Postfix to add a custom header for email received via SMTP Auth. If I could do this then I could write a custom spamassassin rule to whitelist these emails. I am currently looking into having TLS configured in Postfix listening on a different port which sends the mail to a second copy of amavis which when it finishes sends it back to postfix without going via spamassassin. This just seems a bit over complicated.
