[Users] Autoconfig does not support port 465 in SRV record

[Jack]

Hello Andrej,

Thanks for your support! I agree that port 465 is no longer an official standard for SMTP. But there are ISPs that still use the port.

Some background info:

https://en.wikipedia.org/wiki/SMTPS
https://en.wikipedia.org/wiki/Opportunistic_TLS#Weaknesses_and_mitigations
https://www.fastmail.com/help/technical/ssltlsstarttls.html

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Jack
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