Request for assistance

[jabr at abreau.net (John Abreau)]

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mark_glassberg at valley.net writes:

> But the problem is that the mail server knows my machine when I use telnet, but
> not when I use sendmail.

Those are two entirely different modes of operation. When you telnet 
to port 25, the remote sendmail sees you as the direct end-user sending 
the message, whereas when your sendmail relays your message to the 
remote sendmail, the remote sendmail sees your sendmail as a middle-man. 
While such relaying is part of the basic design of sendmail, the fact 
remains that spammers have taken unscrupulous advantage of it for years, 
and as a result it's now considered bad practice to allow relaying in any 
but the most controlled and restricted fashion. 

The normal approach would be to ask your ISP to modify their server's 
setup to allow relaying from your address. I wouldn't expect much 
cooperation from them on this, though. 

I had a shell account I could use on my external mailserver, so I was 
able to set up an ssh tunnel to pass messages to the remote sendmail. 
Without a shell account, though, this approach wouldn't work. 


- --
John Abreau / Executive Director, Boston Linux & Unix
Email jabr at blu.org / WWW http://www.abreau.net / PGP-Key-ID 0xD5C7B5D9
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