Gmail's Mail Fetcher not working with DH

I set up gmail’s Mail Fetcher feature, using mail.mydomain.com and the correct user/pass for my DH email. It’s seems like gmail can connect to the mail server ok, but it never pulls any messages back. Anyone know why?

Got it working. The login has to be the m234234 or whatever - i was trying to use my name, which was silently failing.