On Sat, Apr 09, 2016 at 08:46:54AM -0700, [email protected] wrote:
> I'm setting up mandatory TLS policy for a couple of private client servers,
> using
>
> - smtpd_tls_security_level = may
> + smtpd_tls_security_level = encrypt
>
> I started wondering whether it wouldn't be a bad thing to require
> ALL email delivered to my server, from anywhere, to use TLS.
Your server, your rules, but be prepared to refuse a lot of legitimate
email.
https://www.google.com/transparencyreport/saferemail/
https://www.ietf.org/proceedings/95/slides/slides-95-irtfopen-1.pdf
https://www.elie.net/publication/neither-snow-nor-rain-nor-mitm-an-empirical-analysis-of-email-delivery-security
--
Viktor.
