Ja, das waren meine Verbindungsversuche mit Thunderbird.
Nach einem Neustart von Postfix kam folgendes haraus:
Oct 2 16:14:11 server01 postfix/smtpd[22574]: disconnect from unknown[10.153.97.15]
Oct 2 16:14:11 server01 postfix/smtpd[22573]: disconnect from unknown[10.153.97.15]
Oct 2 16:14:16 server01 postfix/smtpd[22577]: connect from unknown[10.153.97.15]
Oct 2 16:14:16 server01 postfix/smtpd[22577]: lost connection after CONNECT from unknown[10.153.97.15]
Oct 2 16:14:16 server01 postfix/smtpd[22577]: disconnect from unknown[10.153.97.15]
Oct 2 16:14:16 server01 postfix/smtpd[22577]: connect from unknown[10.153.97.15]
Oct 2 16:14:16 server01 postfix/smtpd[22577]: disconnect from unknown[10.153.97.15]
Oct 2 16:14:20 server01 postfix/smtpd[22577]: connect from unknown[10.153.97.15]
Oct 2 16:14:20 server01 postfix/smtpd[22577]: lost connection after CONNECT from unknown[10.153.97.15]
Oct 2 16:14:20 server01 postfix/smtpd[22577]: disconnect from unknown[10.153.97.15]
Oct 2 16:14:20 server01 postfix/smtpd[22577]: connect from unknown[10.153.97.15]
Oct 2 16:14:21 server01 postfix/smtpd[22577]: disconnect from unknown[10.153.97.15]
Oct 2 16:15:16 server01 postfix/smtpd[22580]: connect from unknown[10.153.97.15]
Oct 2 16:15:16 server01 postfix/smtpd[22580]: lost connection after CONNECT from unknown[10.153.97.15]
Oct 2 16:15:16 server01 postfix/smtpd[22580]: disconnect from unknown[10.153.97.15]
Oct 2 16:15:16 server01 postfix/smtpd[22577]: connect from unknown[10.153.97.15]
Oct 2 16:15:16 server01 postfix/smtpd[22577]: disconnect from unknown[10.153.97.15]
Oct 2 16:17:23 server01 postfix/qmgr[20556]: 7B3492FE85B: from=<root@server01.test.intranet>, size=1205, nrcpt=1 (queue active)
Oct 2 16:17:23 server01 postfix/smtp[23304]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
Oct 2 16:17:23 server01 postfix/smtp[23304]: 7B3492FE85B: to=<root@server01.test.intranet>, orig_to=<root>, relay=none, delay=499, delays=499/0.03/0/0, dsn=4.4.1, status=deferred (connect to 127.0.0.1[127.0.0.1]:10024: Connection refused)
Oct 2 16:17:41 server01 postfix/master[20553]: terminating on signal 15
Oct 2 16:17:41 server01 postfix/master[23593]: daemon started -- version 2.11.3, configuration /etc/postfix
Oct 2 16:19:43 server01 dovecot: master: Error: systemd listens on port 993, but it's not configured in Dovecot. Closing.
Oct 2 16:19:43 server01 dovecot: master: Error: systemd listens on port 993, but it's not configured in Dovecot. Closing.
Oct 2 16:19:43 server01 dovecot: master: Dovecot v2.2.13 starting up for imap, lmtp, sieve, pop3 (core dumps disabled)
Oct 2 16:19:43 server01 dovecot: ssl-params: Warning: Regenerating /var/lib/dovecot/ssl-parameters.dat for ssl_dh_parameters_length=1024
Oct 2 16:19:43 server01 dovecot: ssl-params: Generating SSL parameters
Oct 2 16:19:52 server01 postfix/master[2230]: daemon started -- version 2.11.3, configuration /etc/postfix
Oct 2 16:20:01 server01 dovecot: ssl-params: SSL parameters regeneration completed
Oct 2 16:26:58 server01 dovecot: master: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Oct 2 16:26:58 server01 dovecot: anvil: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Oct 2 16:26:58 server01 dovecot: log: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Oct 2 16:26:59 server01 dovecot: master: Dovecot v2.2.13 starting up for lmtp, sieve, pop3 (core dumps disabled)
Oct 2 16:27:09 server01 dovecot: master: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Oct 2 16:27:09 server01 dovecot: anvil: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Oct 2 16:27:09 server01 dovecot: log: Warning: Killed with signal 15 (by pid=1 uid=0 code=kill)
Oct 2 16:29:52 server01 postfix/qmgr[2235]: 7B3492FE85B: from=<root@server01.test.intranet>, size=1205, nrcpt=1 (queue active)
Oct 2 16:29:52 server01 postfix/smtp[5379]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
Oct 2 16:29:53 server01 postfix/smtp[5379]: 7B3492FE85B: to=<root@server01.test.intranet>, orig_to=<root>, relay=none, delay=1249, delays=1249/0.09/0/0, dsn=4.4.1, status=deferred (connect to 127.0.0.1[127.0.0.1]:10024: Connection refused)
Oct 2 16:30:58 server01 amavis[9697]: starting. /usr/sbin/amavisd-new at server01.test.intranet amavisd-new-2.10.1 (20141025), Unicode aware, LC_ALL="C", LANG="de_DE.UTF-8"
Oct 2 16:30:59 server01 amavis[9704]: Net::Server: Group Not Defined. Defaulting to EGID '132 132'
Oct 2 16:30:59 server01 amavis[9704]: Net::Server: User Not Defined. Defaulting to EUID '122'
Oct 2 16:30:59 server01 amavis[9704]: Module Amavis::Conf 2.404
Oct 2 16:30:59 server01 amavis[9704]: Module Archive::Zip 1.39
Oct 2 16:30:59 server01 amavis[9704]: Module BerkeleyDB 0.54
Oct 2 16:30:59 server01 amavis[9704]: Module Compress::Raw::Zlib 2.065
Oct 2 16:30:59 server01 amavis[9704]: Module Compress::Zlib 2.064
Oct 2 16:30:59 server01 amavis[9704]: Module Crypt::OpenSSL::RSA 0.28
Oct 2 16:30:59 server01 amavis[9704]: Module DB_File 1.831
Oct 2 16:30:59 server01 amavis[9704]: Module Digest::MD5 2.53
Oct 2 16:30:59 server01 amavis[9704]: Module Digest::SHA 5.88
Oct 2 16:30:59 server01 amavis[9704]: Module Encode 2.60
Oct 2 16:30:59 server01 amavis[9704]: Module File::Temp 0.2304
Oct 2 16:30:59 server01 amavis[9704]: Module IO::Socket::INET6 2.72
Oct 2 16:30:59 server01 amavis[9704]: Module IO::Socket::IP 0.29
Oct 2 16:30:59 server01 amavis[9704]: Module MIME::Entity 5.505
Oct 2 16:30:59 server01 amavis[9704]: Module MIME::Parser 5.505
Oct 2 16:30:59 server01 amavis[9704]: Module MIME::Tools 5.505