Submitted Forms Not Received By Gmail

Has anyone recently (within the last 2 weeks) stopped receiving website form submission in there corporate Gmail account?

The forms were previously being marked as spam and placed in a spam folder, now they are not being received at all.

Just to clarify, I am talking about corporate gmail mail services, not a normal type of address.

I have customer at dreamhost and at midphase that are reporting the same problem. Any help would be greatly appreciated.