Hi all,

I have the situation where a spammer knows the username and password of an account and is sending spam via that account. I can change the password, however, this account is shared amongst many users and I'd rather not ask all the users to change their password. (Computer literacy is becoming a rare quality these days ;))

Our postfix server is behind a firewall. So the spammer always connects via the gateway. This shared account need not be accessible from outside the network. So I don't mind rejecting all email from that user when originating from the gateway.

I've did some searches and am pretty familiar with the docs, yet nothing strikes me as a solution to this. Is rejecting a sender when it is from a certain IP address possible?

Any advice appreciated.

Kind regards,

Simon

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