On 01.02.21 10:32, Jonathan Sélea wrote:
We currently have a webhosting-environment with many websites. Those
websites is capable of sending email (obviously) via the local SMTP
function.
But sometimes, some of the websites is compromised and used to send
quite alot of spam from the websites - often using random domains.
So, one of the "solution" would be to implmement some kind of filter,
that check the SPF of the domains on outgoing emails and check if they
include or contain the IP or network of our environment and if not,
the emails is just discarded.
Ofcourse, we would employ more anti-spam features, but this would be
only one of them and could probably save us from blacklisting in some
cases.
checking SPF does not make much sense, as the webserver might not be in SPF
but your mail server should be.
simply make list of allowed domains and don't allow sending mail from other
domains than those allowed.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety. -- Benjamin Franklin, 1759
