Please create a tool in dot net for checking EmailID exist or not. Please send me time line.
1. Upload Excel sheet for bulk email id check
2. check special char (",", ";") . if exist split and insert in another location. Such as New row.
3. first check email valid or not.
4. Second email exist or not.
5. In case of false value (3 & 4) remove this email id from excel and insert into second sheet or any where.
Suppose Perfect.firstname.lastname@example.org ,i m able to check the domain name that MX record not the perfect.chourasia is correct means exist or not