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by bradleyland
4899 days ago
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Exactly what I was thinking. SMTP is generally store and forward. Your message gets thrown in a bin and the MTA gets to it when it can. I can't find anything in the actual SMTP RFC [1] indicating that there are limits to how long an email can stay in queue. Google processes a lot of email. The primary constraint limiting how long their MTA backlogs can be is customer satisfaction. Most SMTP servers I've worked on are happy to retry for 72 hours or more. 1: https://tools.ietf.org/html/rfc821 |
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