On 26.10.18 09:27, Poliman - Serwis wrote:
So generally speaking - I should check postscreen, use a decent RBL and
keep smtpd more available for legitimate email. How set decent RBL in
Postfix and which are decent?
I believe googling for RBLs, especially mailing lists' archives may help to
find out. I use spamhaus, sorbs and spamcop, plus dnswl with postscreen.
What means/how to do "keep smtpd more available for legitimate email"?
It means that postscreen will take care of blocking spambots, so smtpd
doesn't have to.
I have one more question which is more less related with main thread. I
would like to know can I block port 25 on firewall?
not if you want to send and receive mail.
blocking port 25 is common at service providers, where customers aren't able
to spam throiugh port 25 (outgoing SMTP) or run mail server (incoming SMTP).
While the latter is usually a businness issue - if you want to run
mailserver, you must pay for static IP (static IP is technically good
requirement) and for potential handling of spam reports
- the former is simple and logical prevention of spam from end-users.
end-users are not supposed to contact mail servers
However, if you are not a service provider, don't simply block 25, if you
want to send/receive mail.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
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