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by sirn
4922 days ago
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Interesting, I know this is a bad idea, but: what if I connect directly to SMTP servers returned from retrieving MX records then send `RCPT TO: <some-email@mailinator.com>` and see if it passed or error with 550? My guess is there will be another whole range of issues involving open relays and servers that happened to not return 550 on nonexistence mailbox? (I'm not trying to block Mailinator, just some exercise for myself.) |
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