Postfix - Locking Down the Server

Postfix can be locked down to only accept email from the MailRoute servers. Because of the wide range of possibilities for postfix configuration, please consider this a general guide, and not a hard-and-fast set of instructions.

1. Edit your main.cf file. This is usually found in /etc/postfix/main.cf
2. Add 199.89.0.0/21 to mynetworks
3. Set smtpd_client_restrictions = permit_mynetworks, reject
4. Execute postfix reload to reload the settings and have them take effect right away

Please feel free to contact us at support@mailroute.net if you have any questions. We use postfix ourselves, and we'll do whatever we can to help.

***for OS X Servers; Add our addresses to mynetworks, change "smtpd_client_restrictions" as specified, and then restart the server. On a mac, that might require a reboot.

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Contact sales@mailroute.net or support@mailroute.net for more information. 

888.485.7726