security, #api, #cybersecurity, #webdev Last Tuesday I opened the delivery report for a campaign I sent to exactly 50 addresses. Twelve had hard-bounced. Every one of those twelve had previously returned SMTP 250 OK from my verification script. A 24% false-positive rate on the protocol's own definition of success is not a rounding error. It is a... Weiterlesen: I trusted SMTP 250 OK for 50 emails. 12 bounced. Why?
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I trusted SMTP 250 OK for 50 emails. 12 bounced. Why?
security, #api, #cybersecurity, #webdev Last Tuesday I opened the delivery report for a campaign I sent to exactly 50 addresses. Twelve had hard-bounced. Every…