Re: dragonfly mail agent (dma) no tls by default

From: Alexander Burke <alex_at_alexburke.ca>
Date: Sun, 24 Nov 2024 21:45:31 UTC
Hello,

>tls (yeah well, starttls)

I recommend — in the strongest possible terms — that you NEVER rely on STARTTLS, instead specifying the IMAPS (993) and SMTPS (465) ports and mandating TLS on every connection.

2014: https://www.eff.org/deeplinks/2014/11/starttls-downgrade-attacks

2021: https://lwn.net/Articles/866481/

Cheers,
Alex
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2024-11-24T17:32:30Z Paul Eskello <paul.eskello@gmail.com>:

> Hi gang (m/f/x),
> 
> Today I accidentally discovered my mailhub did not use tls sending outbound email, for some mail. It turned out my old procmail uses sendmail which is now dma, since I upgraded to freebsd 14. 
> 
> I enabled SECURETRANSFER and STARTTLS in /etc/dma.conf. Done. :-) After thinking about it, I presume I missed a HEADS UP, since all is well documented in https://docs.freebsd.org/en/books/handbook/mail/ . I scribbled some lines to my upgrade checklist.
> 
> But then I started to wonder: why is tls (yeah well, starttls) disabled by default? Isn't that too conservative in soon-to-be 2025?
> 
> P