Exim doesn't support MTA-STS[1] although there is a perl script available[2]. [1] https://www.exim.org/exim-html-current/doc/html/spec_html/ch-encrypted_smtp_c

Exim doesn't support MTA-STS[1] although there is a perl script available[2]. [1] https://www.exim.org/exim-html-current/doc/html/spec_html/ch-encrypted_smtp_connections_using_tlsssl.html https://www.exim.org/exim-html-current/doc/html/spec_html/ch... [2] https://github.com/Bobberty/MTASTS-EXIM-PERL https://github.com/Bobberty/MTASTS-EXIM-PERL