When I try to fill in a form online or register something online which require my email address, after I enter the email address it has a message comes up saying my email address is invalid and not in the format of @domain.com. I am 100% sure there is no typo error and my email address is definitely valid. It happens on random website, like buying my movie ticket etc. I have no problem to login my hotmail email or use it on facebook etc which requires a password.
It only recently happened and if I type my email address on the word doc and copy and paste back to the colomn and it is ok. Please help me to resolove the problem. Thanks