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Old 08-05-2005, 11:15 AM   #1
Registered: May 2005
Location: Malaysia
Posts: 33

Rep: Reputation: 15
Sendmail Relaying Denied, Tensionnnn

can any body help me about sendmail. i'm already 3 day try configure sendmail 8.13.3 on slackware. the error msg is.

j75G5fjD001230: ruleset=check_rcpt, rg1=<>, [] (may beforged), reject=550 5.7.1 <>... Relaying denied. IP name possibly forged []
j75G5fjD001230: lost input channel from [] (may be forged) to MTA after rcpt
j75G5fjD001230: from=<matyoe@mydomain>, size=386, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, [] (may be forged)

Old 08-05-2005, 12:39 PM   #2
Pete M
Registered: Aug 2003
Location: UK
Distribution: Redhat 9 FC 3 SUSE 9.2 SUSE 9.3 Gentoo 2005.0 Debian Sid
Posts: 657

Rep: Reputation: 32

Your problem appears to be a DNS issue, sendmail can't resolve the machine you are sending mail from, "" to it's IP address "" that's why it quotes "may be forged"

There are ways round this but it leaves sendmail open to abuse

Here's a link , use it at your own risk

You won't need a "smart host" statement as external addresses such as should resolve fine via your normal resolv.conf

As already stated "USE AT YOUR OWN RISK"

Old 08-06-2005, 04:17 AM   #3
Registered User
Registered: Apr 2004
Posts: 560

Rep: Reputation: 30
There's no maybe forged about it. is a DOMAIN and not a HOSTNAME

Maybe registering your mailserver box with a dynamic dns service like and then using the real FQN instead of something you made up? for instanace?

All designed to trace dodgy email and so facilitate speedy blocking of bad servers :-)

Last edited by otchie1; 08-06-2005 at 04:20 AM.


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