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[SOLVED] warning: TLS library problem: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:%:

Reported by: Wojtek
Created: 3 months 20 days ago
Last reply: 3 months 20 days ago
OS Name: Ubuntu
OS Version: 16.04.5 LTS (Xenial Xerus)
Views: 13484
warning: TLS library problem: error:140760FC:SSL routines:SSL23_GET_CLIENT_HELLO:unknown protocol:s23_srvr.c:%:

Someone tries to use TLSv1 protocol but is not enabled.

You can enable TLSv1 in postfix and dovecot but such configuration is not recommended as it is not secure. 

Apply it at your own risk otherwise ignore this error.



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