Failed to send test email

I’m also facing same issue..

Versions:
WordPress: 5.2.2
WordPress MS: No
PHP: 7.2.7
WP Mail SMTP: 1.5.2

Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: smtp.gmail.com
Port: 465
SMTPSecure: ssl
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)

Server:
OpenSSL: OpenSSL 1.1.0h  27 Mar 2018
Apache.mod_security: No
SMTP Debug:

2019-08-11 12:31:21	Connection: opening to ssl://smtp.gmail.com:465, timeout=300, options=array (
                   	                  )
2019-08-11 12:31:22	Connection: Failed to connect to server. Error number 2. "Error notice: stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages:
                   	                  error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed
2019-08-11 12:31:22	Connection: Failed to connect to server. Error number 2. "Error notice: stream_socket_client(): Failed to enable crypto
2019-08-11 12:31:22	Connection: Failed to connect to server. Error number 2. "Error notice: stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465 (Unknown error)
2019-08-11 12:31:22	SMTP ERROR: Failed to connect to server:  (0)
2019-08-11 12:31:22	SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

• This reply was modified 5 years, 2 months ago by pragnadeep.

Hi @pragnadeep, @ivitae

The error indicates the issue with your certificate that your web server is serving. Please contact your hosting company support to fix the certificate of a server for you. Alternatively, you can disable the certificate verify with the custom codes. You should not do this unless you have to – it’s compromising your security.

I hope this helps!

Thanks @sanzeeb3 for the reply.

I am using a localhost site – currently in development stage. Is there some way I can fix or replace the certificate being used ? As mentioned, email were sent successfully in the past.

Hi @ivitae,

For the development site, you can disable the SSL verification for PHP 5.6 or higher by adding this custom codes. For the live sites, I recommend to not use this approach because it’s compromising the security, instead contact your hosting provider to get the valid certificates.

In case it helps, here’s the tutorial on how to add the custom codes like this.

I hope this helps!

Thanks @sanzeeb3 !