Thanks, I found the solution. The name of the bad mailbox wasn't in fact empty, but a single blank character which the cyradm and quota commands dutifully removed as "leading blank" in their output. So localhost> sam "user/ " cyrus all localhost> dm "user/ " was what it took to get rid of the mailbox with the "empty" name, and localhost> sam "user/ 10000" cyrus all localhost> dm "user/ 10000" took care of the second one created by the hapless colleague's setquota command. Am 07.05.2013 21:04, schrieb Tilman Schmidt: > A junior administrator of mine mistakenly created a mailbox > with an empty name, by typing into cyradm the commands: > > createmailbox user/$lb > setquota user/$lb 10000 [...] -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 261 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20130507/c053e158/attachment-0004.sig>