Sending Email over IPv4 with Postfix

Google and other email services sometimes block messages sent from an IPv6 address. Sending mail over IPv4 instead is sometimes an easy solution. If you are using Postfix, you can force your outbound emails to be sent over IPv4 by doing the following:

  • Open /etc/postfix/main.cf with a text editor
  • Find the line inet_protocols = all
  • Replace all with ipv4
  • Restart postfix
You should also make sure you have RDNS set up for any IP that you want to send email from. Please see this article for help with RDNS.
  • 50 Users Found This Useful
Was this answer helpful?

Related Articles

How do I connect to my VPS? (SSH)

We recommend the program PuTTY for SSH. You can download it here:...

How do I connect to my VPS? (SSH)

We recommend the program PuTTY for SSH. You can download it here:...

How do I reset/reinstall my VPS OS?

Steps for Reinstalling MAKE SURE YOU DOWNLOAD WHATEVER YOU WANT TO SAVE TO YOUR COMPUTER....

KVM Information / Installation Guide

KVM clients have two ways to install their server OS. Log into the SolusVM control panel and...

How do I upgrade or downgrade my service?

If you would like to upgrade or downgrade your service, we have a convenient process to do just...