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I am using imapfilter to sort my mails on a remote IMAP server provided by some company. My configuration restricts imapfilter to the usage of TLS 1.2 via STARTTLS. I do know how to check which TLS cipher suites are supported by the IMAP server via sslyze. I would like to know how to verify that TLS 1.2 is indeed used and which cipher suite is chosen. Is there e.g. some wireshark incantation which answers this question easily? Or is there some other tools that can be used for this.
This does not observe which cypher is actually used when imapfilter connects. But it shows what cypher could be chosen. – jmg – 2016-03-19T21:49:27.143
If you know the TLS-related
imapfilter
configuration (e.g. its ciphersuites/protocol versions), you should be able to set them via theopenssl s_client
command-line options to show (ideally) what is used whenimapfilter
connects, yes? – Castaglia – 2016-03-19T21:57:55.803