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Looking at this previous serverfault question, I suspect that you could use fail2ban to do this. I don't see an obvious way to count emails from senders, though. You might indeed be on your own for scripting this. Also, are you doing greylisting with milter-greylist? That could help reduce the spam volume as well.


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Unfortunately, yeah, They [TM] find you. Here's a live map of current attacks. I wouldn't be too concerned unless they seem to be performing successful attacks. Unfortunately, this is just... being on the Internet.


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Warning: I haven't tried this. There's some debate over on the Office365 forum about regular expressions in HTML emails. The Microsoft support guy said, "Based on my experience, rules cannot filter texts in the html of emails." However. If the text and the HTML of the message are the same, you should be able to use a regular expression to detect links ...


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This isn't going to be an answer, so much as an explanation of the complexity of what you are trying to do. You have to ALWAYS remember that an email can be addressed to more than one recipient. You said "I want to not queue it if it's a forwarder". Well, what do you do when one is forwarder and one is a local mailbox? You only know the content of the ...


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Nolisting is completely software independent, as it is enacted entirely in DNS records. Nolisting basically means you set an invalid Primary MX record, with your actual, functional mailserver on a lower priority MX record. This could cause some issues with programs that do not follow the SMTP RFCs, and I honestly don't know how effective it is, as spammers ...


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Disclaimer: this is half answer because I can use socket when postfix -> amavis but I can't use it when amavis -> postfix. See the explanation in end of this answer. To use socket, you should use LMTP instead of SMTP to deliver email from postfix to amavis. As NickW said above, you need to put the amavis socket inside the Postfix queue directory. In this ...


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This is the solution for a communication of amavis to postfix over unix socket. It is the second half of masegaloeh's answer. First, you have to modify the /var/spool/postfix/amavis directory: chmod 770 /var/spool/postfix/amavis chown amavis:postfix /var/spool/postfix/amavis The idea behind that: Postfix will create a unix socket smtpd service in this ...


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< bot > Summarize suggestion in comment to CW < /bot > Credits to: Gryphius, Jan Marek, MKzero, mgabriel and of course Wietse Venema for his wonderful piece of code (and documentation). You should check that postfix queue was empty from spam... When outbreak happen (joomla go wildly), your postfix probably has received tons of spam. Postfix will ...


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For on-premises Exchange 2013, you can set some specific spam-handling options, on a per-mailbox basis. http://technet.microsoft.com/en-us/library/bb123981(v=exchg.150).aspx Items of note AntiSpamBypassEnabled (for your Spam Quarantine idea?) SCLJunkEnabled (Items meeting SCL threshold ((See next)) go to Junk Email folder, Boolean.) SCLJunkThreshold(Set ...



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