I’ve been majorly stepping up my game on inbound filters, and the work will continually be displayed in this one file. I just wanted to share the wealth.
Like I mentioned on MXRoute Slack, I still think a score of 2 for HEADER_FROM_DIFFERENT_DOMAINS is too high, given anyone sending from G Suite / Google Apps with a secondary domain will hit that (since G Suite always uses the primary domain in the envelope sender)
A 2 is fairly low for my use, as I don’t reject until 10. I expect some rules to trigger when they’re not warranted, and only the combination of several variables (unless a very specific rule that is well defined and worth rejecting on that basis alone) to cause a rejection.
I guess they just never came up in that capacity. It was generally used as a way to offset when a single legit sender would trigger a series of rules that were otherwise super effective at fighting spam. I’ll never know why twice though lol