[MlMt] error "Mailbox unexpectedly already exists"

[Shoshanna Green]

I tried to clean up some of my Gmail labels in this account, and 
obviously messed something up, because  MailMate keeps popping up the 
following message:

MailMate encountered the following error: “Mailbox unexpectedly 
already exists. Command: 'I6 CREATE "[Gmail]/Sent Mail"'.”.

Mailbox: “[Gmail]/Sent Mail”.


with options of "retry", "take account offline," and "try again later." 
I've been clicking the latter.

I tried going back to my Gmail "manage labels" page on the Web at 
mail.google.com and deleting the "[Gmail]/Sent Mail" label (which never 
has any messages in it anyway), but that doesn't stop the error message 
from appearing, and when I check, the label has reappeared in Gmail's 
Web access.

When I look at the [Gmail]/Sent Mail mailbox for this account in 
MailMate, it's greyed out and marked "(failed)", and MailMate reports 
about 600 messages in it, even though Gmail looked at through Web access 
says the label has 0 messages.

My other Gmail account also has a "[Gmail]/Sent Mail" mailbox in 
MailMate, but it's greyed out and marked "(offline)". I tried taking the 
"[Gmail]/Sent Mail" mailbox that's throwing an error offline as well, 
and the attempt failed with the same "mailbox unexpectedly already 
exists" error.

The mailing list archive includes a message from Sherman Wilcox this 
past March who had the same problem, and Benny said "this was solved off 
list. It was related to the Archive mailbox somehow having become 
unsubscribed (client side) and MailMate did not handle this well." But 
MailMate's Archive mailbox for this account seems fine -- I don't use it 
and there's nothing in it, but it's not greyed out or offline or 
anything.

Can anyone advise? I promise I'll never try to tidy up Gmail again...

Shoshanna Green
shoshannag at gmail.com