SPF Macros

By Matt in postfix on

I'll admit that maybe this isn't too enthralling to the average reader, but for people familiar with SPF records for mailserver, I just learned about something super-powerful I had never heard of before: Using SPF Macros to Solve the Operational Challenges of SPFImproving the maintainability, auditability and effectiveness of your…

Postfix delays explained

By Matt in linux on

This is documented in plenty of other places, but for my own sake, here's the meaning of the delay= and delays= lines in Postfix's maillog. Note that this example is from debugging badly-delayed mail (almost 2 hours!), so do not take these values as good or typical values. But, here…