On Tuesday 09 December 2003 06:15, [EMAIL PROTECTED] wrote:
> Courier does not like esmtp HELO/EHLO from internal smtp engines of
> viruses/spammers, so spam will not be too much.

Hmmmm, if you're right then that would be great.  I assume that you can turn 
on this sort of reverse lookup if you want but I don't think it's on by 
default.

[EMAIL PROTECTED] jeff]$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 superman.ivb.sil.org ESMTP
helo big_fat_ugly_spammer
250 superman.ivb.sil.org Ok.
helo [EMAIL PROTECTED]
250 superman.ivb.sil.org Ok.
quit
221 Bye.
Connection closed by foreign host.
[EMAIL PROTECTED] jeff]$ 

And since I have lots of local users connecting to this machine to send mail 
(using their machine name as the HELO) then I don't think I can turn this on 
so I've never looked into it.   But "out of the box" I think that courier 
will accept mail for valid users from anywhere, which is why accepting mail 
for ANY user seems like a bad idea to me.  But hey, as my wife can tell you, 
I'm wrong all the time, so let me know if I've misunderstood how all this 
works! :-)

Jeff Jansen



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