Please Help !! Sendmail and DSN - NOT DNS

03-23-2004	#1 (permalink)
jano Just Joined! Join Date: Mar 2004 Posts: 11	Please Help !! Sendmail and DSN - NOT DNS I wonder if some expert can solve this problem Please see output of /var/log/maillog below: Mar 23 09:38:24 platinum sendmail[26844]: i2NCcNO26844: from=<jano@domain.com>, size=1082825, class=0, nrcpts=1, msgid=<40602FBC.1070302@domain.com>, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[192.168.38.25] Mar 23 09:38:24 platinum sendmail[26844]: i2NCcNO26844: to=<marcelo@other.com>, delay=00:00:01, mailer=esmtp, pri=1112825, stat=queued Mar 23 09:38:35 platinum sendmail[26854]: i2NCcNO26844: to=<marcelo@other.com>, ctladdr=<jano@domain.com> (500/500), delay=00:00:12, xdelay=00:00:10, mailer=esmtp, pri=1202825, relay=sdmailer.other.com. [...], dsn=5.0.0, stat=Service unavailable Mar 23 09:38:35 platinum sendmail[26854]: i2NCcNO26844: i2NCcP426854: DSN: Service unavailable What is DSN, and why is the service unavailable? I can send e-mail to other domains without any problems. How do I fix this?

03-23-2004	#2 (permalink)
Opnosforatou Linux Enthusiast Join Date: Dec 2003 Location: Vleuten, The Netherlands Posts: 552	Here is some info on the Delivery-Status-Notification Sendmail.org DSN Howto And a nice google search __________________ ---[ MS09-99896 - Vulnerability in All MS Windows OS ; Using Windows Could Allow Remote Code Execution. ]--- Hardware: Asus P4P800, 1GB, P4-3Ghz, Asus V9950, Maxtor ATA HD\'s, 3Com GBit lan, Audigy ZS Plat.

03-23-2004	#3 (permalink)
jano Just Joined! Join Date: Mar 2004 Posts: 11	Is this a normal message to see in maillog? Or does it mean there is something wrong with my config?

03-23-2004	#4 (permalink)
Opnosforatou Linux Enthusiast Join Date: Dec 2003 Location: Vleuten, The Netherlands Posts: 552	What version of sendmail are you using ? 8.8 ? Here is a sample from my maillog using: Code: cat maillog \| grep dsn Code: Mar 23 13:47:50 opnosforatou sm-mta[21070]: i2NClfgD021070: to=<martijnl@opnosforatou.com>, delay=00:00:03, xdelay=00:00:00, mailer=local, pri=198844, dsn=2.0.0, stat=Sent This example shows the DSN for an incomming email to my personal mail account being delivered localy. Code: Mar 22 10:22:24 opnosforatou sm-mta[16147]: i2M9J3q8016147: to=<myhotmailaccount@hotmail.com>, ctladdr=<martijnl@opnosforatou.com> (1000/100), delay=00:03:18, xdelay=00:03:17, mailer=esmtp, pri=33677, relay=mx3.hotmail.com. [64.4.50.239], dsn=2.0.0, stat=Sent ( <405EB052.8040001@opnosforatou.com> Queued mail for delivery) This example shows the DSN for en email outbound to hotmail.com I think we need to adjust something in your sendmail config. Please read the info I've included in my previous post on DSN. __________________ ---[ MS09-99896 - Vulnerability in All MS Windows OS ; Using Windows Could Allow Remote Code Execution. ]--- Hardware: Asus P4P800, 1GB, P4-3Ghz, Asus V9950, Maxtor ATA HD\'s, 3Com GBit lan, Audigy ZS Plat.

03-23-2004	#5 (permalink)
jano Just Joined! Join Date: Mar 2004 Posts: 11	I am running sendmail-8.11.6-27.72 Let me give some more info on my problem. 99,9% of my mail gets delivered without any problem. Yesterday I did a test. I sent two emails to the same recipient. One got delivered, the other not. (See below) [root@server log]# fgrep i2MEnMO08738 maillog Mar 22 11:49:22 platinum sendmail[8738]: i2MEnMO08738: from=<jano@domain.com>, size=563, class=0, nrcpts=1, msgid=<405EFCF1.3070109@domain.com>, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[192.168.38.25] Mar 22 11:49:22 platinum sendmail[8738]: i2MEnMO08738: to=<actionundeadman@ig.com.br>, delay=00:00:00, mailer=esmtp, pri=30563, stat=queued Mar 22 11:49:24 platinum sendmail[8749]: i2MEnMO08738: to=<actionundeadman@ig.com.br>, ctladdr=<jano@domain.com> (500/500), delay=00:00:02, xdelay=00:00:00, mailer=esmtp, pri=120563, relay=mx.ig.com.br. [200.226.132.20], dsn=2.0.0, stat=Sent (ok 1079966962 qp 7332) [root@server log]# fgrep i2MEthO09005 maillog Mar 22 11:55:43 platinum sendmail[9005]: i2MEthO09005: from=<jano@domain.com>, size=563, class=0, nrcpts=1, msgid=<405EFE6E.4020001@domain.com>, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[192.168.38.25] Mar 22 11:55:43 platinum sendmail[9005]: i2MEthO09005: to=<actionundeadman@ig.com.br>, delay=00:00:00, mailer=esmtp, pri=30563, stat=queued Mar 22 11:55:48 platinum sendmail[9015]: i2MEthO09005: to=<actionundeadman@ig.com.br>, ctladdr=<jano@domain.com> (500/500), delay=00:00:05, xdelay=00:00:00, mailer=esmtp, pri=120563, relay=mx.ig.com.br. [200.226.132.20], dsn=5.0.0, stat=Service unavailable Mar 22 11:55:48 platinum sendmail[9015]: i2MEthO09005: i2MEtm609015: DSN: Service unavailable For another user in another domain I also could send e-mail without any problem, and since a few days email is not delivered with the same DSN message as above. I did not change my sendmail.cf file so why am I having these problems now?

03-23-2004

#6 (permalink)

jano

Just Joined!

Join Date: Mar 2004

Posts: 11

Let me beautify my post...

I am running sendmail-8.11.6-27.72

Let me give some more info on my problem. 99,9% of my mail gets delivered without any problem.
Yesterday I did a test. I sent two emails to the same recipient. One got delivered, the other not. (See below)

Code:

[root@server log]# fgrep i2MEnMO08738 maillog
Mar 22 11:49:22 platinum sendmail[8738]: i2MEnMO08738: from=<jano@domain.com>, size=563, class=0, nrcpts=1, msgid=<405EFCF1.3070109@domain.com>, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[192.168.38.25]
Mar 22 11:49:22 platinum sendmail[8738]: i2MEnMO08738: to=<actionundeadman@ig.com.br>, delay=00:00:00, mailer=esmtp, pri=30563, stat=queued
Mar 22 11:49:24 platinum sendmail[8749]: i2MEnMO08738: to=<actionundeadman@ig.com.br>, ctladdr=<jano@domain.com> (500/500), delay=00:00:02, xdelay=00:00:00, mailer=esmtp, pri=120563, relay=mx.ig.com.br. [200.226.132.20], dsn=2.0.0, stat=Sent (ok 1079966962 qp 7332)

Code:

[root@server log]# fgrep i2MEthO09005 maillog
Mar 22 11:55:43 platinum sendmail[9005]: i2MEthO09005: from=<jano@domain.com>, size=563, class=0, nrcpts=1, msgid=<405EFE6E.4020001@domain.com>, bodytype=8BITMIME, proto=ESMTP, daemon=MTA, relay=[192.168.38.25]
Mar 22 11:55:43 platinum sendmail[9005]: i2MEthO09005: to=<actionundeadman@ig.com.br>, delay=00:00:00, mailer=esmtp, pri=30563, stat=queued
Mar 22 11:55:48 platinum sendmail[9015]: i2MEthO09005: to=<actionundeadman@ig.com.br>, ctladdr=<jano@domain.com> (500/500), delay=00:00:05, xdelay=00:00:00, mailer=esmtp, pri=120563, relay=mx.ig.com.br. [200.226.132.20], dsn=5.0.0, stat=Service unavailable
Mar 22 11:55:48 platinum sendmail[9015]: i2MEthO09005: i2MEtm609015: DSN: Service unavailable

For another user in another domain I also could send e-mail without any problem, and since a few days email is not delivered with the same DSN message as above.

I did not change my sendmail.cf file so why am I having these problems now?

03-23-2004	#7 (permalink)
Opnosforatou Linux Enthusiast Join Date: Dec 2003 Location: Vleuten, The Netherlands Posts: 552	Nopes... But did you see this: In the first code post it says: dsn=2.0.0, stat=Sent .... in the second: dsn=5.0.0, stat=Service unavailable ... It could be that someone on the receiving side is playing with his/her mailer config in this case: relay=mx.ig.com.br If 99% of all emails to O.K. then : Don't try to fix something that is not broken. I'll look it up, think you can find a lot of info on the sendmail.org site.. Use the info dsn=2.0.0 and dsn=5.0.0 to search... __________________ ---[ MS09-99896 - Vulnerability in All MS Windows OS ; Using Windows Could Allow Remote Code Execution. ]--- Hardware: Asus P4P800, 1GB, P4-3Ghz, Asus V9950, Maxtor ATA HD\'s, 3Com GBit lan, Audigy ZS Plat.

03-23-2004	#8 (permalink)
jano Just Joined! Join Date: Mar 2004 Posts: 11	Hi Opnosforatou Thanks for some useful help so far. This is the first time somebody from linuxforums.org answers my question. I was beginning to think this forum was dead. What really bothers me is that I've been searching all over the web for solutions to my "problem" but I cannot find anything useful. I will definitely check out sendmail.org and see if there is something valuable there. Oh, and how do I explain to my users, that our configuration is ok, but that maybe a big service provider is playing around with his configuration (as you suggested in the previous post?) or that a bank with 60.000 employees has a configuration problem? I wish there was a way to really test your configuration? I used www.dnsreport.com a few times and found it quite useful.