Via an FTP Client -

An FTP client is a program specifically designed to connect to an FTP server for the purpose of transferring files to and from the FTP server.

Windows and Mac have many commercial ftp clients as well as a few free ones.

Windows FTP clients
Core FTP http://www.coreftp.com/
Filezilla - http://filezilla.sourceforge.net/

Mac FTP clients
Cyberduck - http://cyberduck.ch/
Fetch – http://www.fetchsoftworks.com

A.M. Mailing Services, LLC’s servername is ftp.ammailing.com

***** Please contact your Sales Representative or Project Manager and let them know that you have posted a file to the FTP site.