[Mailman-Users] stat deferred and connection reset

Barry Finkel b19141 at britaine.ctd.anl.gov
Mon May 8 17:32:32 CEST 2006

Vikram Goyal" <tech at craftbits.com> wrote:

>I have created a mailing list using Mailman version 2.1.8 and Sendmail 
>version 8.12 as the MTA on a Fedora 2 box. After creation of the list, I 
>sent out a message to all the members (< 30000). Some messages were 
>received, but most it seems were not. In the sendmail log the following 
>entry was found repeated several times:
>May  7 05:07:16 ip-68-178-242-231 sendmail[12991]: k474oTaH027069: 
>to=<Several Emails>, delay=06:48:40, xdelay=00:00:00, mailer=relay, 
>pri=15687906, relay=someserver.net, dsn=4.0.0, stat=Deferred: Connection 
>reset by someserver.net
>The last two sections bother me. Are the messages only deferred for a little 
>time and will be resent? Why is the connection reset by someserver.net?
>Do I need to resend the message?
>Normal emails are going through without any problem. I am on a dedicated 
>box, and the someserver.net is the smtp out box for the hosting company.
>I have searched a fair bit and can't figure it out, so any help is 

The message from sendmail in the syslog:

     relay=someserver.net, dsn=4.0.0, 
     stat=Deferred: Connection reset by someserver.net

states that while sendmail was talking over SMTP to 


that server reset the connection.  As a result, sendmail has re-queued
the message, and it will retry the connection at whatever time
interval has been set in the sendmail.cf (or submit.cf) file.
Barry S. Finkel
Computing and Information Systems Division
Argonne National Laboratory          Phone:    +1 (630) 252-7277
9700 South Cass Avenue               Facsimile:+1 (630) 252-4601
Building 222, Room D209              Internet: BSFinkel at anl.gov
Argonne, IL   60439-4828             IBMMAIL:  I1004994

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