Using MS Server 2003 and Exchange 2003 - I have started getting emails that are appearing to be sent from an internal address in our AD (webmaster). The subject contains (webmaster@ourdomain.com) along with other verbiage, and the Sender field has names like Viagra.com [webmaster@ourdomain.com].
We have GFI MailEssentials installed on this server however I don't believe I can blacklist my own domain in there and we use this address for other things.
Are there some things I can look at in the SMTP connector or something? I've done a few things like Disable Basic Authentication, and Enable Perform reverse DNS lookup.
I know there are hundreds of settings and I don't want to break anything.
Posts: 6812
Joined: 9.Jun.2004
From: Philadelphia PA
Status: offline
The right thing to do is to get your MailEssentials updated so that the messages are pulled out. I understand your current thing is that you are seeing messages from your own domain but what about tomorrow? They'll be coming from my domain or your home domain. What then?
In fact you can, in Exchange 2003, block your own domain on your own server. In 2003 you could do this because there was an abstraction between messages coming in from the Internet and messages flying around internally.
Unfortunately the article I published seven years ago is probably long, long gone. I am pretty certain that it was in Global Settings in ESM though.
But, best have MailEssentials take care of things. You paid money for it, have it work properly.
Posts: 2077
Joined: 11.Nov.2008
From: The Netherlands
Status: offline
Also take into account that mailaddresses can be spoofed. Which means it might originate from a different server, and not yours. Do not take the sender-address at face-value.
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Hi, Top way to prevent spoofing:- 1.Blind spoofing 2.Nonblind spoofing 3.Denial-of-service attack 4.Man-in-the-middle attack _____________ SEO Limerick
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