So after I have successfully installed a Comodo SSL on a domain name in Plesk 12 I have discovered that Wordpress stopped sending e-mails and in the logs I have found this error:
SSL fail to sign e-mail
Code:
14487#0: *14180 FastCGI sent in stderr: "PHP message: PHP Warning: stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in...