• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 393
  • Last Modified:

Sendmail/MX/DNS problem

I've been using my Linux machine as an SMTP/POP3 server for some time now with no problem.  Recently I started using it as a name server for my company's domain.

I can't receive mail now for accounts on this machine, mail destined for other places works fine (ie, someone@linuxbox.mydomain.com can't get mail, but someone@mydomain.com can..I'm using another mail server for mydomain.com mail).

I get the following in the returned message if I send mail to root@linuxbox.mydomain.com:

   ----- Transcript of session follows -----
553 linuxbox.mydomain.com. config error: mail loops back to me (MX problem?)
554 <root@linuxbox.mydomain.com>... Local configuration error

Here's my domain file:

@               IN      SOA     linuxbox.mydomain.com. hostmaster.mydomain.com. (
                                1       ; Serial
                                28800   ; Refresh
                                7200    ; Retry
                                604800  ; Expire
                                86400)  ; Minimum TTL
                        NS      linuxbox.mydomain.com.
                        MX      10 proxy.mydomain.com.

router                  A       207.247.19.33
linuxbox               A       207.247.19.34
proxy                   A       207.247.19.35
                        MX      10 proxy.mydomain.com.

And here's an excerpt from /var/log/messages:

Jun  6 08:56:59 linuxbox sendmail[1964]: IAA01964: from=<root@linuxbox.mydomain.com.>, size=293, class=0, pri=30293, nrcpts=1, msgid=<Pine.LNX.3.96.97060608565
2.1962A-100000@linuxbox.mydomain.com.>, proto=SMTP, relay=root@localhost

Jun  6 08:56:59 linuxbox named[1945]:XX /207.247.19.34/linuxbox.mydomain.com/MX

Jun  6 08:56:59 linuxbox named[1945]: XX /207.247.19.34/linuxbox.mydomain.com/ANY

Jun  6 08:56:59 linuxbox identd[1969]: from: 207.247.19.34 ( linuxbox.mydomain.com. ) for: 1306, 25

Jun  6 08:56:59 linuxbox identd[1969]: Successful lookup: 1306 , 25 : root.root

Jun  6 08:56:59 linuxbox sendmail[1966]: IAA01964: to=<mike@linuxbox.mydomain.com.>,ctladdr=<root@linuxbox.mydomain.com.> (0/0), delay=00:00:00,xdelay=00:00:00, mailer=esmtp, relay=linuxbox.mydomain.com. [207.247.19.34], stat=Local configuration error

Jun  6 08:57:00 linuxbox sendmail[1966]: IAA01964: IAA01966: DSN: Local configuration error

I've tried with and without an MX record for linuxbox.mydomain.com..both results are the same.

Again, right now all mail to mydomain.com goes to another server..only mail to linuxbox.mydomain.com is being bounced.

Any help would be appreciated..thanks.
0
t-bone
Asked:
t-bone
1 Solution
 
t-boneAuthor Commented:
Edited text of question
0
 
t-boneAuthor Commented:
Edited text of question
0
 
t-boneAuthor Commented:
Edited text of question
0
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
james_zhangCommented:
Run the following command, and post the result here:
/usr/lib/sendmail -bt
3,0 xx@linuxbox.mydomain.com

0
 
devmorfoCommented:
Do you have mydomain.com and linuxbox.mydomain.com in your
sendmail.cw ?
0
 
case051397Commented:
What domain did you set up your sendmail.cf for to be "local"?
If it just is "mydomain.com", your mailer will think of "linuxbox.mydomain.com" as a remote system.

Also check this stuff:
sendmail.cf:
  DMsomeothermachine.mydomain.com
  Djproxy.mydomain.com

resolv.conf:
  domain mydomain.com

0
 
xtermCommented:
Make sure you have an entry like this in /etc/sendmail.cf:

# file containing names of hosts for which we receive email
Fw/etc/sendmail.cw

Then:
$ echo linux.mydomain.com >> /etc/sendmail.cw

then kill sendmail:
$ kill `ps -ax | grep -v grep | grep sendmail | awk 'print $1'`

...and finally restart sendmail:
$ sendmail -bd

voila.. try sending mail to yourself now
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now