Dovecot error:140760FC
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 Running DoveCot on CentOS 7 1511 with Dovecot 2.10.1 and we are getting loads of TLS and SSL errors listed as error:140760FC which appears to be a mismatch of SSL negotiation, but we can't figure out how as we have several seemingly identical boxes and only one is getting the error from the same client. 
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 We tried enabling TLSv1, just to test, but even that did not fix it. 
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 From here says "You can enable TLSv1 in postfix and dovecot" Was TLSv1 enabled in both locations? 
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 Date/Time issue? 

