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There was a problem while sending a test email. Related debugging output is shown below:
Versions:
WordPress: 4.9.5
WordPress MS: No
PHP: 5.6.35
WP Mail SMTP: 1.2.5
Params:
Mailer: smtp
Constants: No
ErrorInfo: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting
Host: smtp.zoho.com
Port: 587
SMTPSecure: tls
SMTPAutoTLS: bool(true)
SMTPAuth: bool(true)
Server:
OpenSSL: Yes
Apache.mod_security: No
SMTP Debug:
2018-04-18 08:43:33 Connection: opening to smtp.zoho.com:587, timeout=300, options=array (
)
2018-04-18 08:43:34 Connection: Failed to connect to server. Error number 2. “Error notice: stream_socket_client(): unable to connect to smtp.zoho.com:587 (Connection refused)
2018-04-18 08:43:34 SMTP ERROR: Failed to connect to server: Connection refused (111)
2018-04-18 08:43:34 SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting