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It works for common spam, but it does not really work for curated lists because they can remove it. (I think it is also an RFC standard, not just gmail, but do
by jfkebwjsbx 6y ago
It works for common spam, but it does not really work for curated lists because they can remove it.
(I think it is also an RFC standard, not just gmail, but don't quote me on this).
- kcolford 6y agoNot an RFC standard but it is a "de facto" standard. Everyone implements it, the config line for it is just commented out on postfix, super easy to use.