Stefan Haupt wrote:
> Hi Michael,
>
> My mailserver is in deed located behind a iptables netfilter. I think that's 
> ok because everyone should put a firewall before DMZ. 
>   

Yes.  But, thats not what I mean.  What I am saying is that some
firewalls can cause issues when telnetting through them to test an SMTP
server - It can interfere with the commands you are sending because it
knows you arent a real MTA connecting.  I've seen it happen plenty of
times with firewalls and even some spamfilters (McAfee appliances in
particular)..

> Please take few seconds and read this post from someone in the sourceforge 
> forum:
>   

Sorry, but I don't read the forums.

> He has the same problem. That's the guy I was talking about. He is using assp 
> in life environment with several thousand "lost connection after DATA" errors 
> in mail.log.
>   

Again, this sounds like a firewall issue.  And, I'd like to clarify, you
dont actually know if you have the same issue as him, because you have
only had flawed telnet tests - You still haven't performed a "real"
(real server to server or real client to server) test, correct?

> I think I will give it a try today and turn assp on. At the end of the day I 
> will take a look in mail.log and grep for lost connections after DATA.

You dont have to go live with a production setup to test.  You can use a
test client (Thunderbird/Outlook/etc to connect directly to ASSP to
verify if there are "DATA" errors when you establish an SMTP session and
transfer a message.  You'll just have to customize some of the ports
etc. in order to perform your tests.


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