Ok, here are two other clients:
Filezilla Client 2.2.12c
Response:	220 Please visit 
http://sourceforge.net/projects/filezilla/
Command:	AUTH SSL
Response:	334 Using authentication type SSL
Status:	SSL connection established. Waiting for welcome message...
Command:	PBSZ 0
Response:	502 Command not implemented for this authentication type
Command:	PROT P
Response:	200 Protection level set to P
Command:	USER xxxxxxxxx
Response:	331 Password required for xxxxxxxx
Command:	PASS ********
Response:	230 Logged on
Command:	FEAT
Response:	211-Features:
Response:	 MDTM
Response:	 REST STREAM
Response:	 SIZE
Response:	 MODE Z
Response:	 MLST type*;size*;modify*;
Response:	211 End
Command:	SYST
Response:	215 UNIX emulated by FileZilla
Status:	Connected
Status:	Retrieving directory listing...
Command:	PWD
Response:	257 "/" is current directory.
Command:	MODE Z
Response:	504 MODE Z not enabled
Command:	PASV
Response:	227 Entering Passive Mode (xxx,xxx,xxx,xxx)
Command:	TYPE A
Response:	200 Type set to A
Command:	LIST
Response:	150 Connection accepted
Status:	SSL connection established
Response:	226 Transfer OK
Status:	Directory listing successful
Command:	PWD
Response:	257 "/" is current directory.
SmartFTP 1.1.985.6
220-FileZilla Server version 0.9.6a beta
220-written by Tim Kosse (Tim.Kosse@gmx.de)
220 Please visit 
http://sourceforge.net/projects/filezilla/
    AUTH TLS
334 Using authentication type TLS
    Connected. Exchanging encryption keys...
    Session Cipher: 128 bit RC4
    SSL encrypted session established.
    PBSZ 0
502 Command not implemented for this authentication type
    USER xxxxxxxxxx
331 Password required for xxxxxxxxxx
    PASS (hidden)
230 Logged on
    SYST
215 UNIX emulated by FileZilla
    FEAT
211-Features:
 MDTM
 REST STREAM
 SIZE
 MODE Z
 MLST type*;size*;modify*;
211 End
    PWD
257 "/" is current directory.
    MODE Z
504 MODE Z not enabled
    PROT P
200 Protection level set to P
    PASV
227 Entering Passive Mode (xxx.xxx.xxx.xxx)
    MLSD
    Opening data connection IP: xxx.xxx.xxx.xxx PORT: xxxx.
150 Connection accepted
    Connected. Exchanging encryption keys...
    Session Cipher: 128 bit RC4
    SSL encrypted session established.
    384 bytes received successfully. (384 B/s) (00:00:01).
226 Transfer OK