Hi, 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). Or is that asking way too much? Thanks
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