topic Problem with mails in Operating System - Linux

Problem with mails

Kaps_2 — Tue, 12 Aug 2008 10:32:27 GMT

Hello All,

I have configured linux sendmail so that it can send mails from the server to the exchange accounts. For this I have edited sendmail.cf file and added the smtp server address in the like :
DSxyz.com

After that I restarted the sendmail server.After this changes i was able to send mails from the server however when I try to reply to these mails they are not getting delivered. Could you please give me any idea what can be the problem.

mailman@dcublrboacms002.blreng.scieng.local on 8/11/2008 2:53 PM
Could not deliver the message in the time limit specified. Please retry or contact your administrator.
< scidubsmtp03.stercomm.com #5.4.7 smtp; 5.4.7 - Delivery expired (message too old) 'DNS Soft Error looking up dcublrboacms002.blreng.scieng.local (MX) while asking iwblrcorsrv004.blreng.scieng.local. Error was: unable to reach nameserver on any valid IP' (delivery attempts: 0)>

From the above msg it looks like to be name resolution error.

Thanks,
Kaps

Re: Problem with mails

Ivan Ferreira — Tue, 12 Aug 2008 12:38:04 GMT

Yes, it seems that you don't have an MX record for you dcublrboacms002.blreng.scieng.local domain.

Re: Problem with mails

Kaps_2 — Tue, 12 Aug 2008 12:42:13 GMT

yeah i dont have the mx record for dcublrboacms002.blreng.scieng.local however is there any other way to do so? like masquarde

Re: Problem with mails

Steven E. Protter — Tue, 12 Aug 2008 15:03:52 GMT

Shalom,

no.

no mail exchange (MX) record, sendmail doesn't know where to send the mail, it does nothing and errors out.

The DNS for this domain must have a MX record added.

DNS 101.

the basics.

SEP

Re: Problem with mails

Ivan Ferreira — Wed, 13 Aug 2008 13:36:26 GMT

There are "mailer tables" that can be used to bypass DNS MX. Bu I don't know if you can do it whith exchange.

Re: Problem with mails

Ivan Ferreira — Wed, 13 Aug 2008 13:38:04 GMT

There are also known as transport tables...

Re: Problem with mails

Ivan Ferreira — Wed, 13 Aug 2008 13:42:50 GMT

Under exchange, they are called "SMTP connector", here is a link about how to configure them:

http://www.amset.info/exchange/smtp-connector.asp