My blackberry curve can't send e-mails. When I send an e-mail via my message menu it hangs for some time, and then fails to send, the message status would read "expected attachment request expired". I can still receive e-mails but can't send. I called the customer care and Airtel claimed their BBC complete does not support sending of e-mails which is strange because I have been doing that for a long time and receiving replies. This problem is a recent development.

I would appreciate suggestions on solution to the problem.