Hello
for smtpd secure communication, I have known how to implement it and how
clients (thunderbird etc) access it.
but for smtp service on port 25, how other MTA talks to me? they are
using plain, startTLS or SSL?
I am not sure on this point.
My configuration on main.cf include:
smtp_use_tls = yes
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_use_tls = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_cert_file = /etc/letsencrypt/live/coakmail.com/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/coakmail.com/privkey.pem
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated,
reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
Thanks.
