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Postmaster virus detected email marked as spam

Posted: 19 Dec 2013, 18:34
by tiagom
Im sending a test email with a file that had an .exe attachment which is blocked by our server.

The postmaster reply to the user stating that the email sent contains a virus is being blocked with the following spam report
  • Spam Report:
    Score Matching Rule
    cached not
    score=35.798
    5 required
    0.10 ANY_BOUNCE_MESSAGE
    -1.90 BAYES_00
    2.00 DSN_NO_MIMEVERSION
    -0.00 NO_RELAYS
    0.00 URIBL_BLOCKED
    0.10 VBOUNCE_MESSAGE
    20.00 VIRUS_WARNING15
    12.00 VIRUS_WARNING33
    3.50 VIRUS_WARNING62

I have tried whitelisting postmaster@alpha.domain in Mailscanner front end from WHM and from the individual user.

So i went and looked at spam.whitelist.rules
It contains several entries. I assume defaults.

So i tried adding:

From: postmaster@alpha.domain yes


Still doesn't work :confused: :confused: :confused: :confused:


Any help is greatly appreciated

Re: Postmaster virus detected email marked as spam

Posted: 20 Dec 2013, 17:23
by sawbuck
Since exe files are denied by default you need to look at the Attachment Filename Checking section in the MS config file. For more granular control you will want to use a ruleset.

Given you are also virus scanning you would need to adjust the virus.scanning.rules to allow an exception for the domain.

Assume you already know, based on the postmaster response you posted, that allowing exe files is generally a bad idea.

Re: Postmaster virus detected email marked as spam

Posted: 20 Dec 2013, 19:59
by tiagom
I think there may be a misunderstanding.

The response containing
Our e-mail content detector has just been triggered by a message you sent:
To: [user]
Subject: test
Date: [date]

One or more of the attachments (winmail.dat, md5.exe) are on
the list of unacceptable attachments for this site and will not have
been delivered.

The virus detector said this about the message:
Report: Report: MailScanner: Executable DOS/Windows programs are dangerous
in email (md5.exe)
Report: No programs allowed (md5.exe)


--
MailScanner

Is being marked as spam with the spam report posted earlier.

There are no attachments. Just that plain text reply. I noticed when looking in mailwatch the from is blank, but in the message there is a from, perhaps that's why the white list rule fails?

Re: Postmaster virus detected email marked as spam

Posted: 31 Dec 2013, 08:42
by Sarah
It looks like you are using some nonstandard spamassassin rules, and these are causing your problem.
20.00 VIRUS_WARNING15
12.00 VIRUS_WARNING33
3.50 VIRUS_WARNING62

Re: Postmaster virus detected email marked as spam

Posted: 06 Jan 2014, 17:51
by tiagom
The email should never even be scanned by spamassassin since it is whitelisted. That is my point.

Re: Postmaster virus detected email marked as spam

Posted: 06 Jan 2014, 20:57
by Sarah
Are you using the front-end to add the email address to the whiltelist? If you edited the file directly it was probably overwritten by the MSFE overnight script. To give any further assistance we'd need to see the full unedited headers of the email that is being marked as spam, plus the contents of your spam.whitelist.rules file. You might want to log a ticket on the helpdesk to provide that information.