Replies: 0
Hi,
All the sites on our webserver are failing when connecting to our mail server. They used to work. All are using comodo certs as is the mail server.
Versions:
WordPress: 5.0.3
WordPress MS: No
PHP: 7.3.2-3+0~20190208150725.31+stretch~1.gbp0912bd
WP Mail SMTP: 1.4.1
Params:
Mailer: smtp
Constants: Yes
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: mail1.ourmailserver.com
Port: 587
SMTPSecure: tls
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)
Server:
OpenSSL: OpenSSL 1.1.1a 20 Nov 2018
SMTP Debug:
2019-02-11 19:13:00 Connection: opening to mail1.ourmailserver.com:587, timeout=300, options=array ( ) 2019-02-11 19:13:00 Connection: opened 2019-02-11 19:13:00 SERVER -> CLIENT: 220 mail1.ourmailserver.com ESMTP ready 2019-02-11 19:13:00 CLIENT -> SERVER: EHLO http://www.ourwebserver.com 2019-02-11 19:13:00 SERVER -> CLIENT: 250-mail1.ourmailserver.com 250 STARTTLS 2019-02-11 19:13:00 CLIENT -> SERVER: STARTTLS 2019-02-11 19:13:00 SERVER -> CLIENT: 220 2.0.0 Start TLS 2019-02-11 19:13:00 SMTP Error: Could not connect to SMTP host. 2019-02-11 19:13:00 CLIENT -> SERVER: QUIT 2019-02-11 19:13:00 SERVER -> CLIENT: ,( ����ŷ1�A����ޖx��.?����WdC.UR�sk?����-�Зƿ���z �����U*z�H ,o���\,A����7*�w){8��)������i���8�̂ʯ��Φ� Vp�i6G��j)�fQ��ˇ@P�t��X�fo����*p�Ϳ6 �䮁������+2��Sq���r����!�Ȓ�Hb���NT�.�8Y0���?���D��� ���#��Stik.�US�.!�$-j���h���S݊Ƕ�M{R!�I 2019-02-11 19:13:00 SMTP ERROR: QUIT command failed: ,( ����ŷ1�A����ޖx��.?����WdC.UR�sk?����-�Зƿ���z �����U*z�H ,o���\,A����7*�w){8��)������i���8�̂ʯ��Φ� Vp�i6G��j)�fQ��ˇ@P�t��X�fo����*p�Ϳ6 �䮁������+2��Sq���r����!�Ȓ�Hb���NT�.�8Y0���?���D��� ���#��Stik.�US�.!�$-j���h���S݊Ƕ�M{R!�I 2019-02-11 19:13:00 Connection: closed
The mail server error log produces
SSL_do_handshake() failed (SSL: error:14037418:SSL routines:ACCEPT_SR_KEY_EXCH:tlsv1 alert unknown ca:SSL alert number 48) while in starttls state