Contatenate text to Date to Sort

Convert 01.01.2024  to 01/01/2024 to count as date in Excel.

 =DATE(RIGHT(A2,4),MID(A2,FIND(".",A2,1)+1,FIND(".",A2,FIND(".",A2,1)+1)-FIND(".",A2,1)-1),MID(A2,1,FIND(".",A2,1)))

Extract Domain from email in Excel or Google sheet

 =TEXTAFTER(A2, "@")

or,

=MID(A1, FIND("@", A1) + 1, LEN(A1) - FIND("@", A1))

Generate emaill address using another column

 =IF(C2="",CONCATENATE(B2,"@","domain.com"),C2)