mailserver - message about every 2 minutes.

[C Townsend]

I'm receiving the following message in my maillog about every 2 minutes.

Mar 22 08:45:58 buzz1-2 sendmail[4275]: NOQUEUE: buzz1-2.buzz1.net [192.168.0.21
] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA

This server is running Linux and is not available on the net as of yet. I need to find out what this means.

Thanks in advance,
Carlos

[Rita C Workman]

Is there by any chance, maybe, some flags set in the sendmail startup.
Take and look and see if you see a -v and/or a -d (that will throw it into debug). I've heard other folks run into something similar.

Just a thought,
Rita

[Michael Steele_2]

Basic sendmail commands

mailq (* check your queue *)

regarding:...sendmail[4275]: NOQUEUE...

sendmail -bs (* version *)

sendmail -bd -q30m (* start *)

killsm (* stop *)

Sounds like there's no proper queue.

MTA is Mail Trasfer Agent.

Unix daemons, like cron, use mail for error reporting purposes.

[Robert-Jan Goossens]

Hi Carlos,

Subject: Q4.18 -- What does "NOQUEUE: Null connection from ..." mean?

Date: February 24, 2000
Updated: March 12, 2000

An entry like:
NOQUEUE: Null connection from host.domain [IP.AD.DD.RESS]

in the logfile means that host.domain connected to your MTA but neither initiated transmission of a message (by issuing the MAIL command), nor used any of the commands that are logged separately
(EXPN/VRFY/ETRN). Unless this happens very often, you can ignore this. If it happens very often, it's either someone playing around or it's a
network problem.

Note 1: The significant part of the message isn't the NOQUEUE, but the "Null connection from ...". In particular, NOQUEUE isn't an error indication, but just a "place-holder" when no queue ID has been assigned, typically because message collection hasn't started (yet). It can occur in other messages too, and there too the significant part is what comes after the NOQUEUE.

Note 2: In 8.10, the text which led to the confusion has been changed to: "... did not issue MAIL/EXPN/VRFY/ETRN during connection to ...".

Hope it helps,

Robert-Jan.

Ps.
http://web.bilkent.edu.tr/mirrors/Sendmail/www.sendmail.org/faq/faq.txt

[Sergejs Svitnevs]

This means:
http://www.sendmail.org/faq/section4.html#4.18

Reegards,
Sergejs