php - Using External SMTP Wordpress on VPS -

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i've installed webmin on vps server , installed postfix outgoing mail. use ubuntu operating system

i use smtp plugin wordpress site. i've set smtp settings zoho smtp , i'm sure setting ok.

when try send message smtp test email wordpress plugin, got message

the smtp debugging output shown below: 2017-08-22 14:27:26 connection: opening smtp.zoho.com:587, timeout=300, options=array (                                       ) 2017-08-22 14:27:26 connection: failed connect server. error number 2. "error notice: stream_socket_client(): php_network_getaddresses: getaddrinfo failed: temporary failure in name resolution 2017-08-22 14:27:26 connection: failed connect server. error number 2. "error notice: stream_socket_client(): unable connect smtp.zoho.com:587 (php_network_getaddresses: getaddrinfo failed: temporary failure in name resolution) 2017-08-22 14:27:26 smtp error: failed connect server: php_network_getaddresses: getaddrinfo failed: temporary failure in name resolution (0) 2017-08-22 14:27:26 smtp connect() failed. https://github.com/phpmailer/phpmailer/wiki/troubleshooting

i've research problem above not going have solution this. but, i'm sure problem in vps mail setting , i'm not sure setting need change fix smtp issue.





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