how to separat the emails that i have ??

[eluser]gyo[/eluser]
To check the email addresses you can use the valid_email function.

For the second problem you should define a separator and stuck with it; if this is not possible then you can do some regular expression to search for *@*.* where the asterisks are the user, the domain and the extension.
Basically you want to search for [email protected]

Hope that helps.

gyo