help!! I need to verify email patterns

Im writing a mail subscription program, but I dont want my monthly newsletter to receive undeliverable mail each time I send it out to all my subscribers.

Is there any way to
1)firstly check the pattern of the email address
2)then check if the domain it resides at is active???

I know there is a way to test patterns, like email addresses but I dont know how to do it in Java. Any help on this would be much appreciated,

well, it could be quite easy to do so. you have to do a little bit of string manipulations.

however, i believe, the best is to change the process:

ask the user for email, and send an email to this email address. then ask them to confirm the email address by clicking on the URL in the email (with a unique identifier for this user).

this solves a lot problems. you probably remember how you registered at these forums.