So Im having a smtp problem. Someone is trying to use my server as a relay for spam mail. Now, my host is blocking port 25 for outgoing mail, so its really not working.

* But I want to stop SMTP in exim4. But Im not sure how to do this with exim4u. To my understanding exim4 is indeed "SMTP", so you cannot stop smtp on exim unless you mean something else :)

I remember having a similar problem but this was not an exim problem but with my horde, some fake spammer manage to get login details of one of my users by sending them fake mail requesting their passwords and emails for some bogus reason - don't be surprise some dummies do replay to this mails providing them with their details. What the spammer did was change the identities on the horde installation and send out a lot of fake mails. You should check which user authenticate the time the emails where send. Also you should check your "exim4u_relay_from_hosts" file and check which ip's are there.

Here is a forum thread I made in the debian forums. http://forums.debian.net/viewtopic.php?f=5&t=65526&p=376626#p376626

Anyone know how to do this?

-Andreas

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