>Is it possible to stop people from sending large quantities of the same
>email to a single user or even a group of users?
no, there's almost nothing that can be done within imail or any mail
server. They are they to recieve mail and if tons of mail to valid users
come in, then the mail server will accept it.
If it goes on long enough and you're quick enough, you should be able to
block, using a packet filter upstream from Imail, ip connections from the
abusing ip, if it's a single ip.
Actually, within Imail you could disable the account so no mail would be
accepted until the bomb expires, but the traffic would still hit Imail, to
be refused as invalid user.
If the mail bomb was coming from an ip address in the Mail-Abuse.org's
database, then a mail gateway using Mail-Abuse and upstream from Imail
would refuse the mail before it got to Imail. This is the solution I have
working in our shop, using FreeBSD and postfix as relay-only mail gateway.
Len
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