Re:Why Can't My Mom Email Me?
by joveian on Thursday April 11, 2024 @08:53AM
(#40001564)
However, the wide use of MTA-STS is quite recent so downgrade attacks have been possible. In fact, Fastmail seems to currently be messing up MTA-STS, I'm not sure if they are intending to enable it or not.
https://www.mailhardener.com/kb/mta-sts