[Unable to find the socket transport "TLS" - did you forget to enable it when you configured PHP? #32673]

I'm facing the following message when sending email through Zoho SMTP server.

[Unable to find the socket transport "TLS" - did you forget to enable it when you configured PHP? #32673]

I tried looking for opennssl support on my PHP installation and it seems everything is OK.

My phpInfo() says that the TLS stream are registered and openssl extension enabled.

I'm using Laravel 5.1 on a ubuntu server 14.04 on Digital Ocean and PHP 5.6.20. I google for a solution but I just found answers for Windows OS.

via Chebli Mohamed