SPF

How to Make Your Mail Trusted by Gmail and Yahoo Mail

by Ed Chen
May 15, 2014October 1, 2021

Almost all free mail providers like Gmail and Yahoo Mail will filter out spam or spoofed emails by validating the source (SMTP server), if your… Read More »

How to Rewrite Return-Path and Sender Address in Postfix

by Ed Chen
May 14, 2014March 27, 2022

When PHP mail() sent out a message to an external mailbox, the message appeared that the return-path and sender address was apache@example.com. Let's see an… Read More »