My experience of the Ruby client referenced was that it was a little out of date. I was seeing errors when trying to use it a couple of weeks ago.

I am using the Gmail gem (https://github.com/nu7hatch/gmail) in couple of my rails projects and it works perfect. Every single mail is delivered.

Ah, I was try to read emails and get Ruby to process them.

there are two ruby gems for Gmail, which did you use?

I actually tried both, as I remember