How to force postfix to relay mails to other SMTP servers for particular domains

Brian Larkin

New Email
I'm new to postfix and could you some guidance. I have a task to send email for specific domains to another SMTP server. The rest of the email needs to go somewhere else. Is this a type of configuration that is supported by postfix?
 

EQ Admin

EQ Forum Admin
Staff member
Hi Brian,

Yes, postfix supports this configuration. First, you'll need to find the config dir, typically /etc/postfix

Update /etc/postfix/transport configuration with the routes needed to relay email for specific domains to another smtp server. Then tell postfix it's updated with "postmap /etc/postfix/transport"

Next, in main.cf update your relayhost with the smtp server that all other email should be relayed to. When done run "postfix reload"
 
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