I am trying to import a contact list into Mail Marketer and am receiving errors when I know the data is correct. What could be causing this?

One of the most common reasons for your contact lists being rejected by Mail Marketer as having bad data is because of trailing space characters on your emails.

Mail Marketer does not know what you want to do with this and treats it as a bad email.

Simply remove these trailing spaces and you will be able to import your list.