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Old 06-20-2005, 04:03 PM   #1
Registered: Jul 2004
Distribution: RHEL 6.2
Posts: 35

Rep: Reputation: 15
SendMail relay open if 'from' and 'to' match domain

I'm using Fedora Core 1, with SendMail 8.12.10.

The relay is closed, except for the company's internal network, which is

But there's one flaw: if I connect to the Internet from home, and I send a message using the company's sendmail as relay, from to, the server accepts it.

So my users are receiving loads of spam from spammers who identify themselves as, and worse, using our own server as relay.

I thought that this would only happen if I configured sendmail with:


but this is not the case.

Does anyone know how to solve this?



Last edited by Pastorino; 06-20-2005 at 04:04 PM.


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