Originally posted by Farakh khan:
1) I am editing my message to make more to the point that I don't need any regex to check the syntax that it has @ and dot or not like these things.
2) I need to know that how can decided about the email that it'll not be bounced?
If you design your application correctly,
you should not have to validate any e-mail addresses. Here's how you do that design: make sure that the user wants to receive e-mails from you. When that happens, the user will make sure to input his e-mail address correctly.
If you have a design where you require an e-mail address, and the user isn't sure that he wants to get e-mails from you, the user is going to put junk in that field. If you try to validate it, the user will then put in valid-looking junk. So validation doesn't do anything for you there.