Make sure that exported file has following columns
Site – It may have only YAHOO or GMAIL as data according to email account provider.
Email – email address e.g. someone@gmail.com
Pwd – Password or email account
If exported file does not have above column then existing columns can be renamed or new columns can be created as required.
You can also add following columns to file if you have corresponding data:
Firstname - First name of email account holder
Lastname - Last name of email account holder
Gender - 1 for male, 2 for female
DOB - Date of birth
Country - Country
State - State
Zip - Zip
CraigsListPwd - Craigslist password
GmailFWEmail - Gmail Forwarding email (if set)