Re:An Ode to Apple’s Hide My Email
by justsomehnguy on Tuesday April 12, 2022 @05:11AM
(#31000270)
> mitigated
For this attack to be mitigated everyone should implement it. Gmail and Live.com has MTA-STS records, Fastmail doesn't, one regional provider with millions of accounts doesn't have it too.
And finally your MTA should support it and be configured to deny the delivery if MTA-STS validation fails (and adversary, who is happily MITMing your traffic, shouldn't fiddle with DNS and HTTPS and of course blocking HTTP/S from the MX would be considered cheating!).
All in all, SMTP traffic is encrypted, but it is not secured.
For this attack to be mitigated everyone should implement it. Gmail and Live.com has MTA-STS records, Fastmail doesn't, one regional provider with millions of accounts doesn't have it too.
And finally your MTA should support it and be configured to deny the delivery if MTA-STS validation fails (and adversary, who is happily MITMing your traffic, shouldn't fiddle with DNS and HTTPS and of course blocking HTTP/S from the MX would be considered cheating!).
All in all, SMTP traffic is encrypted, but it is not secured.