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In reply to Comment by Andrew Ayer

Reader Charles on 2014-08-13 at 15:41:

I guess most of the MUA these days are mobile phones. I would be surprised if clients like Thunderbird are still used massively (and when they are, they are usually connected inside a protected corporate environment).

I was referring to both actually. Would the gmail MTA be exposed to MITM attacks when delivering an email to an smtp server? This is a pretty big weakness as we know private communications is the focus of sovereign spying. Is there any real danger these days to not allowing an unencrypted connection? Surely no reputable smtp MTA wouldn't support TLS, only spammer bots.


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