Transfer flat files to the FTP by attaching or zipping the file(s) in an email and sending to The accepted field delimiters are comma, pipe or tab delimited. The file size restriction is 25M or whatever is set by your email system (whichever is lower). Multiple files can be attached in the email, and it's very important the files have correct naming conventions. This is important because the ROI import must be able to locate the file by file name pattern on the FTP, which is designated in the import setup. 

The chosen email address that sends files to needs to be whitelisted by ROI in order for the files to transfer successfully to the FTP. Notify if you are interested in emailing to the FTP. Before emailing to the FTP can work successfully, your ROI account must be provisioned to accept email flat files. 

Contact if you have additional questions.