Sendmail virtuser prob

[RambOrc <ra...@ra...>]

Hello,

It might sound like a Sendmail prob first, but I strongly think it's got 
to do with Usermin...

There are many virtusers set up in my Sendmail config that deliver mail 
to a local Unix user. They all work, with a couple of exceptions. Mails 
sent to co...@ho... and sub...@ho... bounce. 
Any other similar setups work, only these 2 not (and maybe some others I 
not yet became aware of). They both were configured to go to Unix user 
coljp. This is the user I tested Usermin with last weekend when I set up 
its Read Mail module for multiple domains. Since then, these 2 addies 
bounce all mails, regardless what user I set them to go. What setting or 
file could be the culprit? I'm convinced the Usermin config somehow 
blocks these addresses, especially that the error message is not the 
standard "mailbox doesn't exist" stuff, but 
"_Mailbox_disabled_for_this_recipient/Giving_up_on_(IP)"