This tutorial covers problems with DKIM failures in Google Workspace when utilizing a secure email gateway (SEG) in conjunction with an SMTP relay. It describes how to guarantee correct DKIM configuration and steer clear of typical issues. Postfix setups and Python scripts to check and preserve DKIM integrity are included in the guide.

Sending messages to several different SMTP servers might be difficult. Postfix and Python can be used to accomplish dependable forwarding to the Winmail and James servers. Complex routing solutions are made possible by Postfix setup, which includes transport maps and custom scripting. Although there are drawbacks to DNS and basic Python scripts, combining Postfix with extra tools and configurations offers a reliable way to handle mail forwarding requirements.