Hi Thijs,

> A new subscriber of our egroup can't get her listserv-password registred; an 
> 'invalid parameter' error appears when she tries to register, but I can't find 
> any requirements.

If I recall correctly, it must be six characters long at least, and 
alpha-numeric only, ie only letters and digits.

Others may chime in with suggestions, having better knowledge than I, but 
perhaps you could ask this person to register a word you've chosen (eg, 
"coffee"), and do it via email command with a copy going to you.  Then you'd be 
able to see exactly what she was doing, and pick up any mistakes.  Once that is 
successful, she can go ahead and change it to something else, to keep it 
private.

The command for setting a password is:

PW ADD NEWPASSWORD

where NEWPASSWORD is the password of choice.

The command for resetting the password is:

PW RESET

after which a new password can be set with the first command, or via the web 
interface.

Note that these commands don't include the name of the list.  Passwords are 
specific to the server, not the list.  Both commands will probably invoke a 
reply asking the sender to confirm before they are carried out; instructions are 
in the email that is sent.

Hope this helps.  :-)

Kind Regards,
Wendy Howard
Assistant to ListOwner, Guai-Support Group