Hello! A problem with an android device connecting to postfix on a CentOS8 server.
mail_version = 3.3.1 I have this in the log: Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: initializing the server-side TLS engine Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: connect from p57b62c8e.dip0.t-ipconnect.de[87.182.44.142] Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: setting up TLS connection from p57b62c8e.dip0.t-ipconnect.de[87.182.44.142] Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: p57b62c8e.dip0.t-ipconnect.de[87.182.44.142]: TLS cipher list "aNULL:-aNULL:HIGH:MEDIUM:+RC4:@STRENGTH:!aNULL" Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: SSL_accept:before SSL initialization Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: SSL_accept:before SSL initialization Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: SSL3 alert write:fatal:protocol version Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: SSL_accept:error in error Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: SSL_accept error from p57b62c8e.dip0.t-ipconnect.de[87.182.44.142]: -1 Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: warning: TLS library problem: error:14209102:SSL routines:tls_early_post_process_client_hello:unsupported protocol:ssl/statem/statem_srvr.c:1661: Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: lost connection after STARTTLS from p57b62c8e.dip0.t-ipconnect.de[87.182.44.142] Jul 18 14:55:12 dualbit1 postfix/smtpd[493943]: disconnect from p57b62c8e.dip0.t-ipconnect.de[87.182.44.142] ehlo=1 starttls=0/1 commands=1/2 # postconf -n alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin compatibility_level = 2 daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5 home_mailbox = Maildir/ html_directory = no inet_interfaces = all inet_protocols = all mail_name = Mailserver dualbit.de mail_owner = postfix mailbox_transport = lmtp:unix:private/dovecot-lmtp mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man meta_directory = /etc/postfix mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain, myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix/README_FILES sample_directory = /usr/share/doc/postfix/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop shlib_directory = /usr/lib64/postfix smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt smtp_tls_CApath = /etc/pki/tls/certs smtp_tls_cert_file = /etc/letsencrypt/live/smtp.dualbit.de/fullchain.pem smtp_tls_key_file = /etc/letsencrypt/live/smtp.dualbit.de/privkey.pem smtp_tls_loglevel = 1 smtp_tls_note_starttls_offer = yes smtp_tls_security_level = may smtp_use_tls = yes smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = dualbit.de smtpd_sasl_path = private/auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt smtpd_tls_CApath = /etc/pki/tls/certs smtpd_tls_ask_ccert = yes smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/letsencrypt/live/smtp.dualbit.de/fullchain.pem smtpd_tls_key_file = /etc/letsencrypt/live/smtp.dualbit.de/privkey.pem smtpd_tls_loglevel = 2 smtpd_tls_received_header = yes smtpd_tls_req_ccert = no smtpd_tls_security_level = may smtpd_tls_session_cache_database = btree:/var/lib/postfix/smtpd_tls_session_cache smtpd_tls_session_cache_timeout = 3600s smtpd_use_tls = yes tls_random_source = dev:/dev/urandom I can connect from my PC with claws-mail without problem. Any hint on this? Regards Andreas
