In Linux (and also in the World of Windows), there is a small great tool called wget (you probably already know it, it’s pretty popular). I have been using it for some years know as it is very convenient for downloading files (or even entire HTML websites) from the command line (specially when you manage a Linux server through SSH). What I didn’t know about it was that it also allows you to recursively copy files from a FTP server (a task that is not usually pleasant).
This is how:
wget -r ftp://username:email@example.com/*
If the FTP username is something like this: firstname.lastname@example.org, then, you should replace the @ by a + simbol, like this: user+somedomain.com.