Sergio Mira:
> Hello,
>
> I have an MTA that only sends email from my applications.
> I have on this server DKIM, RDNS, etc.
>
> I send email with SMTP connection..
> Number of emails sent through this MTA increases from day to day.
>
> I was thinking in implement another server, with same configuration that
> this one.
> - mail1.example.com
> - mail2.example.com
>
> My question is, how to balance outgoing emails with two (or more) SMTP
> servers?
> Am I going to need a main server that forward emails to this other SMTP
> servers?
First, you have DNS records for each server name:
mail1.example.com IN A 1.2.3.4
mail2.example.com IN A 1.2.3.5
Then, you also have DNS records for a generic name:
mail.example.com IN A 1.2.3.4
mail.example.com IN A 1.2.3.5
Configure the clients to use mail.example.com.
Wietse
