in reply to Inbox Message getting from Gmail

That module may be perfectly capable of doing what you need, but considering there are other choices on the CPAN, and they're all better documented than that one, I'd move on to something where the author spent a little more time with the POD. Often the synopsis is all you need to get minimally productive with a module. That one doesn't provide any help in the synopsis, and no description of its functions. It doesn't seem like a complete work.