Modifications to Sendmail

[RedBack]

I need to change the mail gateway that sendmail is using. Currently we have a DNS entry for mailgw. I can not change the DNS entry. I do not want to modify the etc/host file. Can I change the entry in sendmail.cf "Smart" relay host from Dsmailgw to Dsnewgw ? Do I need to do anything else?

[Jeff Schussele · Accepted solution]

Hi Mark,

After you make the change to sendmail.cf you'd have to bounce sendmail.
/sbin/init.d/sendmail stop
/sbin/init.d/sendmail start

Rgds,
Jeff

[Stefan Farrelly]

No, all you need to change is DS and all mail will now be forwarded to this host. Restart sendmail and youre done.

[S.K. Chan]

Yes you can modify the DS macro in "sendmail.cf". Make sure you give it a full domain name. And "sendmail" has to be restarted after the change.

[Sean OB_1]

This is pretty easy. Simply change the DS macro to your new gateway. Be sure to use a FQDN

DSyour.domain.here.com

Then stop sendmail and restart it.