Am 14.10.2015 um 16:19 schrieb Nicolas Repentin: > > It's a little tricky because we need to filter all lines with 'Junk', why not using spamassassin as milter plugin, so you can reject spam tagged mails during the SMTP conversation with the sending server?
> to get the name of msgid > ([email protected] > <mailto:[email protected]>), to get > the transaction ID (3A5A9606BB), to get the IP address (31.31.126.189 > <http://31.31.126.189>).... > > If I can find the way to do it, it could block a lot of junk mail before > the spammer make transactions (and load on the system). > and what - if that could work - should fail2ban do if the domain name it finds does resolve to multiple ip addresses? Another point would be: you must rely on a header that could easily be forged. My opinion is: you would have to perform quite an effort on a solution that could easy be tricked/confused which again imho is not very reliable.
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