16 Feb
2014
16 Feb
'14
3:28 p.m.
Hi,
Can any one provide some hints for IPTables rules or
Exim config to rate
limit my SMTP ports without interfering too much with normal mail
operations? Alternatively, any suggestions to help Spamassassin process
quicker/better?
Just firewall everything for 12 hours. If that's not enough to encourage
the spammers to give up then you can probably extend it a little more
without having any remote mailservers bounce messages.
During this time, legitimate mail should queue on the sending host and
be retried for anywhere between 24 and 72 hours.
Just make sure you hide the mail server in such a way as it generates a
temporary error on the sending side rather than a permanent one.
Regards,
@ndy
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andyjpb(a)ashurst.eu.org
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