nelchee on "[Plugin: Gmail SMTP] Test email error"

I'm using a Google Apps account (the domain is on GoDaddy, if that helps).

I'm getting an error with the test email:

Connection: opening to smtp.gmail.com:587, timeout=300, options=array ( 'ssl' => array ( 'verify_peer' => false, 'verify_peer_name' => false, 'allow_self_signed' => true, ),)
SMTP ERROR: Failed to connect to server: Network is unreachable (101)
SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

Server info:
OS: Linux srebro.avalon.hr 2.6.32-642.1.1.el6.x86_64 #1 SMP Tue May 31 21:57:07 UTC 2016 x86_64
PHP version: 5.6.23
WordPress version: 4.5.3
WordPress multisite: No
openssl: Available
allow_url_fopen: Enabled
stream_socket_client: Available
fsockopen: Available

https://wordpress.org/plugins/gmail-smtp/