GetLoginNameFromEmail Method
The GetLoginNameFromEmail method of the SPUtility class returns the domain user account of the user based on the specified site collection and e-mail address.
Parameters
site A Microsoft.SharePoint.SPSite object that represents the site to which the user belongs.
email A string that contains the e-mail address of the user.
Return Value
A string that contains the domain user account.
Requirements
Platforms: Microsoft Windows Server 2003
Security: Code Access Security