Same problem here, reindex on a mailbox stuck in the middle, now the account can't login anymore nor receive email (postfix shows timed out while sending end of data).
Running ZimbraServer/src/perl/soap/reindex.pl (action status, start, cancel) just hangs, running it on another mailbox does work.
Nice to see that there might be a bug filled for this. (
Index Interrupted - User Can't Login ) but this bug is not accessible by me ( You are not authorized to access bug #7725. )
I'm not running Network Edition. When I ran the reindex on the mailbox it was version 3.1.3 now upgraded to 3.1.4 but no way to fix the account.