Forwarding SMTP to two Mailforwarders

[svkadmin]

Hi AIX or Sendmail Professionals !!!

I have an AIX server with sendmail AIX5.1/8.11.6p2/8.11 that needs to forward all emails to two mailforwarders with the same priority (Not fail-on-fault).
So it should send to both mailservers with some kind of "round-robin".

Is there a way to solve this behaviour inside sendmail without using a local DNS ??

The only thing my DNS needs to do is to solve the forwarding to the servers (if i need one). Thats all, nothing more !!

If i need to use DNS how should i configure the DNS files ??

/etc/named.conf
/usr/local/domain/named.abc.data
/usr/local/domain/named.abc.local
/usr/local/domain/named.abc.rev
/usr/local/domain/named.ca
/etc/resolv.conf

what entries should i use in sendmail ???

I appreciate any tip from you

//Best regards Martin

 

[warpzero]

1) Create a "CNAME" record within your DNS and reference both of your mail servers.

ie
mail_relay.mydomain.com. IN CNAME mail1.mydomain.com.
mail_relay.mydomain.com. IN CNAME mail2.mydomain.com.

"mail_relay.mydomain.com" when configured will resolve to either "mail1 or mail2" in a round-robin fashion.

2) Edit your "sendmail.cf" file and look for a "DS" reference. By default this is not configured. This will allow you to relay your mail to an alternate mail system.

DS mail_relay.mydomain.com

3) restart sendmail

Any messages sent will either go to mail1 or mail2.

NOTE: Make sure that you allow this server to relay through both of your mail servers.


Michael


WarpZero Technologies

http://www.warpzero.com/

 

[svkadmin]

Thank you very much Warp !!

It works very good now and the round robin is working.


// Best regards MArtin