Dear Postfix users,
a client told me they don't receive emails from a specific client.
A look in the mail server logs reveals the following:
Apr 8 09:53:07 cx20 postfix/smtpd[5402]: connect from
mail.euronet-ag.de[195.14.239.4]
Apr 8 09:53:07 cx20 postfix/smtpd[5402]: SSL_accept error from
mail.euronet-ag.de[195.14.239.4]: -1
Apr 8 09:53:07 cx20 postfix/smtpd[5402]: warning: TLS library problem:
error:1417A0C1:SSL routines:tls_post_process_client_hello:no shared
cipher:ssl/statem/statem_srvr.c:2260:
Apr 8 09:53:07 cx20 postfix/smtpd[5402]: lost connection after STARTTLS
from mail.euronet-ag.de[195.14.239.4]
In the email from my client I also see error messages from a Microsoft
Exchange server.
So I suppose it's a MS Exchange. Perhaps an ancient version?
How could I fix this?
Thanks
& greetings
Becki
linux # postconf -n | grep tls
smtp_enforce_tls = no
smtp_tls_CAfile =
smtp_tls_CApath =
smtp_tls_cert_file =
/etc/dehydrated/certs/webmail.beckspaced.com/fullchain.pem
smtp_tls_key_file = /etc/dehydrated/certs/webmail.beckspaced.com/privkey.pem
smtp_tls_loglevel = 0
smtp_tls_session_cache_database =
smtp_use_tls = yes
smtpd_tls_CAfile =
smtpd_tls_CApath =
smtpd_tls_ask_ccert = no
smtpd_tls_auth_only = yes
smtpd_tls_cert_file =
/etc/dehydrated/certs/webmail.beckspaced.com/fullchain.pem
smtpd_tls_key_file =
/etc/dehydrated/certs/webmail.beckspaced.com/privkey.pem
smtpd_tls_loglevel = 0
smtpd_tls_received_header = no
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom
tls_ssl_options = NO_RENEGOTIATION
