I have a Gmail account that imports (via POP) messages from an old Hotmail account that people still send mail to. I normally read my mail with Thunderbird, not the web interface. The thing is that Gmail imports the mails once per hour (approx), and sometimes I want to know if right now there are messages in my old account. I could just go and hit the "import now" button, but whatever.

Is there someplace in the settings where I can change it so the importing happens once each, say, 15 minutes? Alternatively, is it possible to make a script that will tell Gmail to import the messages at that moment, just like it would if I went to the Settings and clicked "Check if I have mail now". I've heard about libgmail for Python, but it doesn't seem like it can do that.