Le 3/2/21 à 9:04 PM, Arjen de Korte a écrit :
Citeren Voytek Eymont <voytek@sbt.net.au>:
On Wed, March 3, 2021 1:17 am, Yassine Chaouche wrote: hmm, just tried this, 110/143 gives error, 995/993 doesn't:
I'll try changing in TB to SSL/TLS not StartTLS, 995 or 993, etc, and, see if error goes
# echo | openssl s_client -connect emu.sbt.net.au:110 2>/dev/null | openssl x509 -noout -enddate
On port 110/143 you need to tell the POP3/IMAP server to upgrade the connection to TLS. In that case, it will work just fine:
# echo | openssl s_client -connect emu.sbt.net.au:110 -starttls pop3 2>/dev/null | openssl x509 -noout -enddate notAfter=Apr 27 12:11:32 2021 GMT
#echo | openssl s_client -connect emu.sbt.net.au:143 -starttls imap 2>/dev/null | openssl x509 -noout -enddate notAfter=Apr 27 12:11:32 2021 GMT
Remember that there is a difference between connections that are upgraded to TLS (110/143) and connections that use SSL by default (995/993). If you don't tell the first that you want to use TLS, the server will not present the certificate, unlike the latter.
Regards, Arjen
*tl;dr *: use*-starttls *if you want TLS on a non-TLS port.
-- Yassine