I would like to understand exactly what these postfix log messages tell me about starttls, if anything:
Dec 24 13:09:32 mx32 postfix-p25/smtpd[25786]: SSL_accept:SSLv3/TLS write session ticket Dec 24 13:09:32 mx32 postfix-p25/smtpd[25786]: Anonymous TLS connection established from accounting-2.internal.harte-lyne.ca[192.168.216.88]: TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256 Dec 24 13:09:32 mx32 postfix-p25/smtpd[25786]: NOQUEUE: client=accounting-2.internal.harte-lyne.ca[192.168.216.88], sasl_method=LOGIN, sasl_username=byrnejb_hll Dec 24 13:09:33 mx32 postfix/smtpd[36248]: initializing the server-side TLS engine Dec 24 13:09:33 mx32 postfix/smtpd[36248]: connect from localhost[127.0.32.1] Dec 24 13:09:33 mx32 postfix/smtpd[36248]: 52DEC3DC1C: client=localhost[127.0.32.1] Dec 24 13:09:33 mx32 postfix/cleanup[27823]: 52DEC3DC1C: message-id=<1366581056.0.1608833361...@accounting-2.internal.harte-lyne.ca> Dec 24 13:09:33 mx32 postfix/smtpd[36248]: disconnect from localhost[127.0.32.1] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5 Dec 24 13:09:33 mx32 postfix/qmgr[23987]: 52DEC3DC1C: from=<supp...@harte-lyne.ca>, size=1549, nrcpt=1 (queue active) Dec 24 13:09:33 mx32 postfix-p25/smtpd[25786]: proxy-accept: END-OF-MESSAGE: 250 2.0.0 from MTA(smtp:[localhost]:10025): 250 2.0.0 Ok: queued as 52DEC3DC1C; from=<supp...@harte-lyne.ca> to=<supp...@harte-lyne.ca> proto=ESMTP helo=<accounting-2.internal.harte-lyne.ca> sasl_username=<byrnejb_hll> Dec 24 13:09:33 mx32 postfix/smtp[28101]: 52DEC3DC1C: to=<supp...@harte-lyne.ca>, relay=imap.hamilton.harte-lyne.ca[216.185.71.57]:25, delay=0.15, delays=0.02/0/0.11/0.02, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 72A511C0F8C) Dec 24 13:09:33 mx32 postfix/qmgr[23987]: 52DEC3DC1C: removed Dec 24 13:09:37 mx32 postfix-p25/smtpd[25786]: disconnect from accounting-2.internal.harte-lyne.ca[192.168.216.88] ehlo=2 starttls=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=8 -- *** e-Mail is NOT a SECURE channel *** Do NOT transmit sensitive data via e-Mail Unencrypted messages have no legal claim to privacy Do NOT open attachments nor follow links sent by e-Mail James B. Byrne mailto:byrn...@harte-lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3