Sendmail local domain is hosted externally e-mail fails :(

sendmail

I have sendmail which works great sending to external domains, but for its own internal domain it tries to deliver mail locally instead of externally based on the MX records. Is there a way to fix this?

I have looked at other posts, but haven't been able to figure it out.

Best Answer

I think you may benefit from "nullclient" configuration of sendmail. Just put the following in your /etc/mail/sendmail.mc:

include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`nullclient setup')dnl
OSTYPE(`linux')dnl
FEATURE(`nullclient',`your.mail.server.address.or.name')dnl

It will forward everything to an external mail server except mail addressed to 'root' (at least this is how it works on Centos).

Related Solutions

CentOS Sendmail – Ignoring MX Records for Local Domain

Some people in #sendmail on freenode helped me figure out that the problem in this particular case was not with send mail, but my dns records. I had a CNAME for my domain name pointing to the application server that was sending the mail, using an A record instead fixed the problem.

Sendmail Configuration to not deliver mail to local machine

If you are playing the "sendmail.mc" game:

define(`SMART_HOST',`smtp.your.provider')

If you hack sendmail.cf directly:

DSsmtp.your.provider

...but if you hack sendmail.cf directly you probably already knew that.

This tells the system that for accounts in its own domain that it doesn't directly know about, send mail to smtp.your.provider which presumably knows what to do with it. Note that accounts that it does know about (ie root) will need to be aliased to a non-local account or messages to root will be delivered locally.

Best Answer

Related Solutions

CentOS Sendmail – Ignoring MX Records for Local Domain

Sendmail Configuration to not deliver mail to local machine

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