We are happy to announce that we have enhanced our Group Import algorithm such that even super-large files can be uploaded for import. Previously, files over 150 MB would not process correctly and our data team would have to manually import the email list. Now, multi-GigaByte files can be uploaded through the web interface or via FTP, and JangoMail will begin to instantly process the file.
For more information on importing data into JangoMail Groups, see this tutorial.
For more information on how to FTP data files for importing into JangoMail, see this blog post.