How to know the email is valid??

[aneeselahi]

Hi all,
I make a mail application by using php, its for the mass mailing program my company have large amount of his member's email IDs. 780000 and more.
by his own forum but somebody put fake IDs like, abcd@nomail.com or so on.
there is no domain, no mail ID even I think no person who get the mail

my question is how we diagnose, either ID is original or not. because I send many mail in a single time how the program understand it. how I remove that from a nasty long list?

Suggest me plz.

[bluewalrus]

Confirmation email verified before adding it to the list/database.

[james438]

I think what bluewalrus is saying is that there is not a program to verify whether an email is valid or not, but that in the future your users should reply to a confirmation email address before the email address is submitted to a database.

When I said that you can't verify whether an email address is valid I meant that if a person says their email address is person2@hotmail.com when it is really person@hotmail address both will look valid to an email detection program. The best way to take care of this problem is to have your users reply to a confirmation email.

Detecting whether an email is valid by whether it follows a basic format instead of being just a bunch of random letters is mostly possible, but that doesn't sound like what you are looking for here.

[aneeselahi]

Thanks,

its really gr8 to got the answer fast.

Thanks everybody I try to do like that.