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They should be returning 421 for backend outages so that sending servers queue and retry the emails. 550 can be interpreted by some as deleted [1] or even bann
by LinuxBender 6y ago
They should be returning 421 for backend outages so that sending servers queue and retry the emails. 550 can be interpreted by some as deleted [1] or even banned accounts in some cases. Maybe someone here could convince them to change the logic that occurs during an outage.
[1] - https://en.wikipedia.org/wiki/List_of_SMTP_server_return_codes#%E2%80%94_5yz_Permanent_negative_completion https://en.wikipedia.org/wiki/List_of_SMTP_server_return_cod...
- mlyle 6y agoYah. Maybe there's an unexpected way that things can fail resulting in 550's. But maybe at Google's scale you should have some kind of kill switch to stop answering SMTP or to not send permanent errors at all, so that you could flip a switch and prevent the worst consequences of this rather than let it go on for a couple of hours.
- deleted 6y ago[deleted]
- octoberfranklin 6y agoAbsolutely this. I am astonished that either (a) this switch has not been flipped yet or (b) this switch does not exist. Somebody is incompetent here.
- mrich 6y agoPerhaps Gmail is just being discontinued ;)
- octoberfranklin 6y agodon't get my hopes up!