I wrote:
If I understood the Illustrated Guide correctly, the password for IMAP
and POP3 should be the same as for Webmail access. Authentication fails [......]
I was able to solve the problem.
Thunderbird's Account Wizard uses the _mailbox_ name part of the
e-mail address to preset the user name used for server login.
This _works_ well with the other accounts I have (POP3). But
Gandi Mail really _requires_ the _full_ e-mail address. This is
correctly shown in the Illustrated Guide; I simply missed the
point. There should be a warning in the Guide, that the wizard's
default must be modified. Eudora's Account Wizard played the
same trick on me ;->
Since all zillion <g> IMAP server names
IMAP.userdomain.tld
are mapped onto one server (mail.gandi.net?), the domain name
part of the e-mail address is required to identify the mail
storage allocated to each user. The same holds true for access
via POP.
Regards,
-Heribert