On 2009-11-08 at 13:15 +1100, Charlie wrote: > I am receiving SMTP traffic sent to me from many guests in hotel through > automatic SMTP redirection. > We have a system whereby the hotel is allowed to send 'From' up to 200 > different email addresses each day. > This works fine for the most part. > Sometimes, though, a problem occurs. Someone using the hotel's IP address > sends out a single spam email from 200 different email 'From' addresses > within the space of about 10 minutes. This uses up the hotel's entire quota. > My question is this: does Exim have some sort of built-in mechanism that can > cope with, say, limiting the number of different email addresses that are > allowed to be used by a particular IP address, per time period (e.g. 1 > hour).
Yes. > Or is that asking way too much? No. You're looking for the term "ratelimit". You can search The Exim Specification for that word, to see a couple of approaches, including a top-level ratelimiting which can be applied to certain hosts, or the "ratelimit" ACL condition for more complex requirements. -Phil -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
