Since I set up contact forms on various websites I’ve had a slowly increasing volume of spam. Not direct spam sent to me, but bounces from non-existent addresses that were being spamme, apparently from my address. Unfortunately the spam wasn’t originating from my address, but my address was somehow picked up (probably from before I secured the contact forms on the site) and was being used as the “reply to” address. After some investigation I heard about SPF which is an e‑mail anti-forgery system.
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