A common problem is that some people cannot receive emails. Outlook Express never stopped, but they see a message in the middle of the middle. email providers can be very expensive to buy.
The email address is the most important email address addresses are the most important information exchanged to by email, the case of the recipient of the email.

For this reason, it is necessary to have a valid email address, some people mistakenly throw away their old address, they can lose the most import