Share your knowledge at the LQ Wiki.
Go Back > Forums > Linux Forums > Linux - Software
User Name
Linux - Software This forum is for Software issues.
Having a problem installing a new program? Want to know which application is best for the job? Post your question in this forum.


  Search this Thread
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: 31

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.


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sendmail.... Relaying denied. IP name lookup failed Krishna2412 Linux - Security 6 06-21-2005 01:01 AM
Email "Relaying denied" (sendmail) Wynand1 Linux - Networking 1 04-06-2005 07:47 AM
Relaying denied, Sendmail 8.12.9 grieseju Linux - Software 1 05-07-2003 09:10 AM
"Relaying Denied" by Sendmail colporteur Linux - General 2 12-27-2002 08:40 AM
Sendmail Relaying Denied barDo Linux - Networking 2 11-07-2001 10:51 AM

All times are GMT -5. The time now is 12:52 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration