Relaying email from Postfix via another SMTP Server

Have you ever been in a situation where you want to relay your emails from your Postfix server via another SMTP server? This is certainly possible and its way too simple:

First thing to do is configure Postfix in your machine. Once done, edit the configuration file for Postfix (usually under /etc/main.cf) and editing the below value:

#relayhost =

to

relayhost = smtp.emailprovider.com

Once done, all emails sent via your Postfix server will be relayed through the desired Outgoing server.

Other options that may interest you are as follows:

• myhostname = hostname.emailprovider.com
• mydomain = emailprovider.com
• masquerade_domains = emailprovider.com

The last option will correct the envelopes shows as "user@emailprovider.com".

Hope that helps someone :-)