Solved

Relaying denied. IP name lookup failed

Posted on 2007-11-30
3
2,907 Views
Last Modified: 2013-12-17
I'm getting the below error and I've been on the phone with Red Hat for over 2 hours and they cannot figure it out. It seems like a simple question, wWhy is relaying being denied? Here's the entry in the /var/log/maillog

Nov 30 08:58:35 mammoth sendmail[13583]: lAUGwYMT013583: ruleset=check_rcpt, arg1=<user@gmail.com>, relay=[66.51.204.153], reject=550 5.7.1 <user@gmail.com>... Relaying denied. IP name lookup failed [66.51.204.153]

The domain name is geoffandcindy.com and it has a valid MX record.  The local-host-names has the domain in it 'geoffandcindy.com' and sendmail.mc has the following special options enabled along with the normal other ones:
define(`confAUTH_OPTIONS', `A p y')dnl
TRUST_AUTH_MECH(`LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `LOGIN PLAIN')dnl
define(`confTO_IDENT', `0')dnl
FEATURE(delay_checks)dnl
FEATURE(`no_default_msa',`dnl')dnl
FEATURE(`smrsh',`/usr/sbin/smrsh')dnl
FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl
FEATURE(redirect)dnl
FEATURE(always_add_domain)dnl
FEATURE(use_cw_file)dnl
FEATURE(use_ct_file)dnl
0
Comment
Question by:Geoff Millikan
  • 2
3 Comments
 
LVL 21

Expert Comment

by:robocat
ID: 20392219

Why don't you add 66.51.204.153 to your reverse DNS lookup zone ?
0
 

Author Comment

by:Geoff Millikan
ID: 20393915
Mail will be sent from many IP addresses since our users travel...  So IP address stuff will not work.
0
 
LVL 21

Accepted Solution

by:
robocat earned 500 total points
ID: 20394299


Try

define(`confAUTH_OPTIONS', `A y')dnl

or

define(`confAUTH_OPTIONS', `A')dnl
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Resolve Outlook connectivity issues after moving mailbox to new Exchange 2016 server
As tax season makes its return, so does the increase in cyber crime and tax refund phishing that comes with it
In this video we show how to create a Shared Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Sha…
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

813 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

10 Experts available now in Live!

Get 1:1 Help Now