You may want to comment out protocol or cipher tweaks' these can
reduce interoperability:
postconf -n | grep tls
I do not think I am using any tweaks and try to keep things as default as
possible. Or maybe I'm misunderstanding.
[root@host /]# postconf -n | grep tls
milter_rcpt_macros = i {rcpt_addr} {rcpt_host} {rcpt_mailer} {tls_version}
smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
smtp_tls_CApath = /etc/pki/tls/certs
smtp_tls_security_level = may
smtpd_tls_cert_file = /etc/letsencrypt/live/example.com/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/example.com/privkey.pem
smtpd_tls_security_level = may
Is there something to improve?
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