How to configure sendmail 8.9.3 to secure mail RELAY.

[Worapoj P.]

Dear All expertise,

Could you please to help me. Right now my site got a backlist from ORBS
(Open mail Relay Blacklist), that my mail Relay(runing Sendmail) can be
produced junk mail or spam mail from other site. After that I upgrade
Sendmail from 8.8.6 to 8.9.3 by applied patch PHNE_18546 but I don't
how to configure them to receive/relay from only one host(one IP),
only one domain and refuse for other host and other domain.


Thank you very much for you help.
Worapoj P.

[Kofi ARTHIABAH · Accepted solution]

For the machine that you want to use as the relay, edit the file /etc/mail/access and insert the following line:

IP.ADD.RES.SS RELAY

where IP.ADD.RES.SS is the IP address of the host you want to relay for.

you could also insert the line:

mydomain.com RELAY

to relay from any host within mydomain.com.

I hope this helps. BTW you can find more information about the new features of sendmail at: http://www.sendmail.org/~ca/email/doc8.9/README.cf.html

cheers.

[Worapoj P.]

Dear cheers,

Thank you very much for the suggestion, it is useful for me.

Worapoj P.