is there a file size limt on the import? i have just done a report for our custermer emails but everytime i try to upload the file it bombs out..?
There isn't a specific limit, but if you have a very large file the browser connection may time out. Also, a file with a large number of complex fields might have issues.
Please contact support at campaignmonitor dot com and attach the file, and we can take a look for you.