Even GMail sucks. Our sorry story:
Off to Italy, having done our communications and reservations, etc. with a GMail account.
Arrived in Rome and attempted to use it to provide/get further information.
Oh noes! You're using your account from a different location! Nobody ever travels or gets a GMail account to be universally (earthily?) accessible!
You must send us your cell phone number (we don't have one) or your home e-mail address so we can ask for confirmation. We can't access that. In fact, we used a GMail account so as to not bother with setting up a web access.
Fortunately, I saved the previous e-mails, created a new GMail account and used that to communicate. Most people just reply, so we got the responses on the new account.
Summary: GMail sucks.