hi We got our server hijacked today. We use "relay for adresses" and one of our clients servers, who is using MDaemon was used as a relay to realy through our server. I blocked all coming smtp connection to adresses other than our mail server's. (outgoing smtp was blocked for a long time, but that was the first time someone relay through our customers. I am now more likely to buy Hijack, that will budgeted soon. Meanwhile need more ideas on what i can do to increase security. One idea is to block all mail through our server where the From or the Replyto is from a local domain, or a local valid address. Is this a good idea ? and can this be done with Imail/declude ?
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