Mail Relay

[Leovino A. Trinidad, Jr]

Hi all!

I'm trying to configure a mail relay server using sendmail 8.12.8. Unfortunately, the relaying would not work. What seems to be the problem?

Regards,


LAT

[Alexander Chuzhoy]

did you insert the line in
/etc/mail/access

allowing relay for domain for which you're trying to enable it?


after inserting this line you should restart the sendmail service or to run "make" from within /etc/mail

[Leovino A. Trinidad, Jr]

Hi Alex!

Yes, I already configured the access file and even the relay-domains.

Regards,



LAT

[Alexander Chuzhoy]

are you able to connect to your mail server's IP address via port 25 ?

I mean did you configure it to listen on it's actual IP (not the loopback)?

in /etc/mail/access the domain name syntax should be like in the following example:
for domain microsof.com you simply add
microsoft.com RELAY


line. No preceding/trailing dots

[Leovino A. Trinidad, Jr]

Yes Alex. I already test the smtp port by remotely telnetting the box... and it's responding...

Regards,


LAT

[Jerome Henry]

Could you then post your logs ?

J

[Jerome Henry]

BTW, relay could look also this way :
Linux.com OK
10.0 RELAY
Accepting mails coming from linux.com, relaying everything from 10.0.x.x
Did you set up /etc/mail/relay-domains, or do you just use /etc/mail/access ?

J

[Alexander Chuzhoy]

you can enter this line to /etc/mail/sendmail.mc


FEATURE(promiscuous_relay)
it will enable relay for everybody

then do:
m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

service sendmail restart



Best Regards...

[U.SivaKumar_2]

Hi,

Have you compiled the access.db after creating access file ?.

#cd /etc/mail
#make

Restart the sendmail and try again.

regards,

U.SivaKumar

[Francisco J. Soler]

Hi, What about postfix?

If you have problems with sendmail, and you can switch to another MTA, try postfix, is easier configure it.

Frank.

[Steven E. Protter]

On most red hat installations, iptables is configured to block port 25 smtp

check the /etc/sysconfig/iptables file

make sure port 25 is set to allow traffic.

Post your file if you need help.

service iptables restart

SEP

[Martin P.J. Zinser]

Hi LAT,

just one word of caution, FEATURE(promiscous_relay) is nothing you want to do on a system with a direct connection to the internet. SPAM services will find and misuse your system in no time! If you are behind a secure firewall and need to route internal networks only OTOH it might be a handy shortcut.

Greetings, Martin