Nov 22, 2011, 08:20 AM
Auth smtp/submission mails marked as SPAM by spamassassin
PLESK version 9.5.4, Ubuntu 10.04
I have a plesk server with a lot of clients. Some of these clients use my plesk server as an outgoing mailserver. Because port 25 is blocked by most ISP's they use port 587 for sending emails. Mails that are sent by a client using this mailserver as SMTP server to another domain within plesk gets marked (not blocked) as spam by spamassassin. Mails to external addresses (like gmail) are not marked in any way. Some of the scores the mail gets from Spamassassin are:
- RCVD_IN_PBL (Because all ISP home addresses are in the PBL of spamhaus)
- DOS_OUTLOOK_TO_MX (Because outlook directly connects to this mailserver)
- HELO_LOCALHOST (Because computer/phone identifies itself as localhost)
These emails should not be marked at all because they are sent by an authenticated user. On an old server with a previous version (plesk v 9.2.3, Ubuntu 6.06) this problem dit not occur at all.
It seems that after some searching on the internet that this is related to the version of qmail used by plesk is not RFC 3848 compliant (see http://forum.parallels.com/showthread.php?t=84122). Postfix seems to have a fix (http://adam.shand.net/archives/2008/..._smtp_clients/). This doesnt work (http://wiki.apache.org/spamassassin/DynablockIssues) because there is no header that indicates a auth smtp mail. And there are more people with this problem, and no answer that works.
For now i disabled the above scores because this helps, but doesnt solve the problem. Does anyone have a real solution for this?
Thanx in advance
May 21, 2012, 01:35 PM
Is there a resolution to this?
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