From forum post
Is there any way to configure Piwik to send emails through a GMail server? GMail requires using TLS for the connection and I can't find the option to change this.
-> is it possible with current custom mail server implementation? if yes, maybe we can add this info as inline help (as lot of users would be interested in this). If not possible, this ticket is a feature request.
(In ) fixes #1676 - add "SMTP encryption" selection in General Settings which sets the 'ssl' option in the transport-layer. Added some more help text.
(In ) Refs #1676
Added FAQ How do I send Piwik emails using Gmail SMTP server?. let me know if you have any feedback