emails from server getting returned
Hello,
I've have an email server that's running Slackware 11 and Sendmail 8.14.2 that was running fine until a few days ago. Users suddently started getting this message shortly after they send out email.
Subject: Warning: could not send message for past 4 hours.
**********************************************
** THIS IS A WARNING MESSAGE ONLY **
** YOU DO NOT NEED TO RESEND YOUR MESSAGE **
**********************************************
The original message was received at Mon, 11 Aug 2008 15:18:41 -0600
from mailserver.mydomainname.com [127.0.0.1]
----- Transcript of session follows -----
<userID@hotmail.com>... Deferred: Connection refused by mx3.hotmail.com.
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old
It also sends an attachment which contains the following.
Reporting-MTA: dns; mydomainname.com
Arrival-Date: Mon, 11 Aug 2008 15:18:41 -0600
Final-Recipient: RFC822; usrID@hotmail.com
Action: delayed
Status: 4.4.1
Remote-MTA: DNS; mx3.hotmail.com
Last-Attempt-Date: Mon, 11 Aug 2008 19:27:40 -0600
Will-Retry-Until: Sat, 16 Aug 2008 15:18:41 -0600
After the 5 days I get a Returned mail.
Subject: Returned mail: see transcript for details.
The original message was received at Fri, 8 Aug 2008 13:58:44 -0600
from server.mydomainname.com [127.0.0.1]
----- The following addresses had permanent fatal errors -----
<usrID@hotmail.com>
----- Transcript of session follows -----
<usrID@hotmail.com>... Deferred: Connection refused by mx3.hotmail.com.
Message could not be delivered for 5 days
Message will be deleted from queue
There is an attachment with this email as well that contains the following.
Reporting-MTA: dns; mydomainname.com
Arrival-Date: Fri, 8 Aug 2008 13:58:44 -0600
Final-Recipient: RFC822; usrID@hotmail.com
Action: failed
Status: 4.4.7
Remote-MTA: DNS; mx3.hotmail.com
Last-Attempt-Date: Wed, 13 Aug 2008 14:22:41 -0600
The line Reporting-MTA looked a little weird to me, so I did a telnet to our mail server and I got this
Telnet mailserver 25
220 mydomainname ESMTP Sendmail 8.14.2/8.14.2; Day Month Year time
To me, it looks like sendmail isn't pulling the server's name and attaching it to outgoing emails. Since the receiving email servers only get my domainname they think it's spam or something malicious and eventually bounce it back to us.
Believeing there's something in the sendmail.cf file that's configured wrong I did some checking and editing. So far, in the sendmail.cf file, I have edited the lines Fw and Dj like this.
Fw/etc/mail/local-host-names
Dj$m
The Fw line allows the server to recieve emails, and the Dj line gives our domainname since I'm not running DNS on this server. Two other servers are handling DNS and these two servers have been added to /etc/resolv.conf. I also added the mail server name to the /etc/mail/local-host-names.
Someone suggested that I find a line that starts with Cw and add myserver.mysomainname.com and then restart sendmail. I did but it didn't change anything.
Right now I'm drawing a blank. Which is why I'm posting. Hoping someone give me an idea or two. If you have a question or need more info, I'd be more and happy to give you what you need.
Thanx!
