ange-ftp and explicit/implicit TLS

[David Diem]

Hello,

I'm trying to connect to a FTP server that requires TLS -- that is, FTPS. I 
learned that /bin/ftp cannot do this, so I changed ange-ftp-ftp-program-name to 
lftp. Ange-ftp still responds with "550 - TLS required on the control channel". 
In a shell outside of emacs, "lftp myuser@myserver.com" can succesfully log in 
(the TLS information is given on stdout) -- however, that is not the case for 
the command "lftp myserver.com" (without the "user@") and a subsequent "DIR" or 
similar. The difference of the non-emacs (non-ange-ftp) shell's output differs 
to that of ange-ftp in that the first says "AUTH TLS" at an early point.

Is this what is called explicit TLS? How could one tell ange-ftp to say "AUTH 
TLS" early on? My real question, though, is why do the outputs of ange-ftp and 
non-ange-ftp "plain" lftp differ anyway? As I understand the 
ange-ftp-name-format regexp, ange starts by saying something in the form of 
user@server.com, that is, it does include the user right form the beginning.

Best regards,
David