SMTP-AUTH mail being marked as spam
gerard at seibercom.net
Sun Apr 27 23:32:21 IST 2008
On Sun, 27 Apr 2008 18:30:27 +0100
Julian Field <MailScanner at ecs.soton.ac.uk> wrote:
> Gerard wrote:
> > On Sun, 27 Apr 2008 17:14:53 +0100
> > Julian Field <MailScanner at ecs.soton.ac.uk> wrote:
> >> Valmiki N. Ramsewak wrote:
> >>> Hi,
> >>> I run the latest version of mailscanner and postfix 2.3.6.
> >>> I send mail from my laptop, via the mail server. I have SMTP-AUTH
> >>> enabled so only credentialed users can send. However any mail sent
> >>> this way is being marked as spam. This happened to me before and I
> >>> realized the problem was I wasn't having postfix add the
> >>> (authenticted user = xyz) line in the mail headers, so I included
> >>> that and it worked. Now I'm not sure what the problem is.
> >>> If I login to my my mail server and send mail from mutt it
> >>> works just fine and doesn't mark it as spam.
> >>> I do want mailscanner to scan the mail, just not mark
> >>> authenticated mail as spam, but check for viruses.
> >>> The spamassassin score is -ve.. but it says its being marked as
> >>> spam because of spamhaus-ZEN. Granted I'm on a DSL connection with
> >>> dynamic ip, so I have no control over what my ip address is when I
> >>> reconnect.
> >> You can't use a blacklist that includes dial-up dynamic addresses
> >> on your server, connect from a dial-up dynamic address, and not
> >> expect to get blacklisted. Simple logic :-)
> >> Can you move your blacklist checking into your MTA and have Postfix
> >> not apply blacklist checks to authenticated SMTP connections?
> >> By the time MailScanner gets at it, it doesn't know whether you
> >> were authenticated or not (but you could write a simple Custom
> >> Function to set the "Spam List" setting to different values
> >> depending on the first header in the message, and look for the
> >> signs that your mail server thinks you are authenticated).
> >> Jules
> > Are you the only user on the system? If so, just send via port 587.
> > Do not allow Mailscanner to touch that port. You will still receive
> > mail via port 25, which is scanned by Mailscanner. It is fairly
> > trivial to set that up on a Postfix system.
> If you do that, you won't get any virus scanning either, which is
> rather a dangerous thing to do.
If he is the only user of the system, there really is not any risk. He
should know whether he is sending SPAM or not. I know several instances
of Postfix configured in exactly that manner. Now, if he is hosting a
mail server for others, then that is a different matter. I was not lead
to believe that however. He still enjoys the protection of Mainscanner
on his inbound mail (port 25) so I really do not see the problem.
Just my 2¢.
gerard at seibercom.net
A LISP programmer knows the value of everything, but the cost of nothing.
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