problems with nnimap and gcc, gnus-message-archive-group

[chris wallace]

I use nnimap and want to save a copy of outgoing messages.  So I put 

(setq gnus-secondary-select-methods
      '((nnimap "QMUL"
                (nnimap-address "imap.qmul.ac.uk")
                (nnimap-list-pattern ("*"))
)))

(setq gnus-message-archive-group "nnimap+QMUL:sent-mail")

When I write a mail, I see a Gcc header
Gcc: nnimap+QMUL:sent-mail

But after sending it with C-c C-c, there is no copy in
nnimap+QMUL:sent-mail.

I can manually move messages to this group with B m
nnimap+QMUL:sent-mail, so do not see why the Gcc isn't working.

Any suggestions?

Chris.