I tried to use Email::Send::Gmail too, and also failed. The error I got is "not a GLOB reference at ... SSL.pm line 16".

I was somewhat more successful using Email::Send, but the email was rejected by Google's policies, as hippo suggested. Google will allow you to lower your security settings to allow the device to connect but they warn that it is not a good idea.

Correction: it was Email::Send::SMTP::TLS, which uses Email::Send, the documentation shows how to use Gmail.