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Exchange servers weren't "rejecting" my email. They were giving me SMTP 250 (Queued mail for delivery) then silently failing to deliver it. Hotmail sender supp

by teach 11y ago

Exchange servers weren't "rejecting" my email. They were giving me SMTP 250 (Queued mail for delivery) then silently failing to deliver it. Hotmail sender support kept saying "I do not see anything offhand that would be preventing your mail from reaching our customers from this IP" Also, my emails were and are text/plain. I'm sure Exchange does reject malformed emails, but that wasn't my problem.

marcosdumay 11y ago
My experience with a malconfigured server interfacing Exchange is that Exchanges pretends everything is ok while receiving (with a 250 response at the end), and may sometimes notify its user (with a bounce message) while sending, but may also not. But, of course, YMMV. And I have no experience at all sending email to Hotmail. I just thought it was worth checking your server settings.