RE: Sendmail NOQUEUE issues

Check the logs. If in the logs are mentined even timeout errors it is highly
likely that your internet connection link is not stable enough. These logs
as the one you have shown shows that there have been attempts to start mail
delivery. The TCP connection is set up, but than the connection is
interrupted without follwing any of the SMTP protocol procedures. Check if
you can receive mail from other mail servers, say Yahoo. Try also to remove
one at a time the black list entries to check if they provide any effect. If
you can get emails from Yahoo finally  try to contact the mail admin of the
mail servers that you have problems with so that they can investigate this
problem and inform you with their view of the problem.

    Sincerely
Mr. Olsi Lulani


-----Original Message-----
From: Bret Chrismer [mailto:[email protected]] 
Sent: Monday, June 30, 2003 5:14 PM
To: [email protected]
Subject: Sendmail NOQUEUE issues

Just curious as if anyone else out there has started to see errors like this
in their maillogs.  As of last Thursday or Friday, I have not been able to
receive mail from known Exchange mail servers, and even the below mail
server (see snip 1).  This is happening on my Redhat 7.2 box, as well as my
Redhat 8.0 box.

I have made no changes in my configs in the past week.


<snip 1>
Jun 29 16:24:15 proxy sendmail[12721]: NOQUEUE: nat-pool-rdu.redhat.com
[66.187.233.200] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
<end snip 1>

My Sendmail M4 does contain the following:

<snip 2>

FeatureFEATURE(`dnsbl', `bl.spamcop.net', `"Spam blocked see:
http://spamcop.net/bl.shtml?"$&{client_addr}', `t')dnl
FeatureFEATURE(`dnsbl',`spammers.v6net.org')
FeatureFEATURE(`dnsbl',`rbl.maps.vix.com',`"550 Mail from " $&{client_addr}
" refused by blackhole site rbl.maps.vix.com. See
http://maps.vix.com/cgi-bin/lookup?"$&{client_addr}""')dnl
FeatureFEATURE(`dnsbl',`dul.maps.vix.com',`"550 Mail from host "
$&{client_addr} " refused: CONSULT YOUR ISP. We do not accept deliveries
direct from remote dialups. Use your ISPs local SMTP server or authenticate
via POP3 first. See http://maps.vix.com/dul/"')dnl
FeatureFEATURE(dnsbl,`relays.mail-abuse.org',`"550 Mail from "
$&{client_addr} " refused - open junkmail relay. CONSULT YOUR MAILSERVER
ADMIN. See http://relays.mail-abuse.org/ cgi-bin/nph-rss?"
$&{client_addr}""')dnl
FeatureFEATURE(`dnsbl',`relays.orbs.org',`"550 Mail from " $&{client_addr} "
refused - open relay. CONSULT YOUR MAILSERVER ADMIN. See:
http://www.orbs.org"')dnl EXPOSED_USER(`root')dnl
Otherdnl This changes sendmail to only listen on the loopback device
127.0.0.1
Otherdnl and not on any other network devices. Comment this out if you want
Otherdnl to accept email over the network.
Otherdnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')
Otherdnl NOTE: binding both IPv4 and IPv6 daemon to the same port requires
Otherdnl a kernel patch
Otherdnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')
Otherdnl We strongly recommend to comment this one out if you want to
protect
Otherdnl yourself from spam. However, the laptop and users on computers that
do
Otherdnl not have 24x7 DNS do need this.
Otherdnl FEATURE(`accept_unresolvable_domains')dnl
Otherdnl FEATURE(`relay_based_on_MX')dnl
MailerMAILER(smtp)dnl
MailerMAILER(procmail)dnl
OtherFeatureDefineMailerOS Type

<end snip 2>

Any insight is appreciated.

Bret Chrismer
[email protected]
www.parkcrestag.org
Everybody ought to go to Sunday School!!!



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