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Did the sender domains in question have SPF records at any point? SPF is essentially a self-maintained whitelist. Blacklists are public and searchable. Someth
by autotypo 9y ago
Did the sender domains in question have SPF records at any point?
SPF is essentially a self-maintained whitelist.
Blacklists are public and searchable. Something to check after dealing with an infected machine, for example.
- strictnein 9y ago> SPF is essentially a self-maintained whitelist. Ironically, commercial spammers have the best SPF records. And DKIM. And all the other goodies.