A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data
I guess you want to get Corresponding Email from another sheet.
Change E2 to the cell you want to find.
=VLOOKUP(Sheet1!E2,Sheet1!A:B,2,0)
If my understanding above is not consistent with yours, share some dummy data and expected result more clearly or a test file.
For sharing a sample workbook, upload to OneDrive or any other cloud drives. Then post a link here.
Why a sample file is important for troubleshooting. How to do it. - Microsoft Community