qmail - catch-all user to multiple accounts

[Steventually]

Hey all,

I'm running a server where all the return requests go to a common catch-all id (ie/ catch@myserver.com). I'm using php through imap (courier-imap) to scan for new messages to deliver them to my SQL database for distribution.

Having only one process to process the messages is kinda slow, and can get overwhelmed. I'd like to move up to 10 processes (ie/ i%10 = servernumber) to split the load. Is there any way for me to split the mail coming to my id catch into 10 id's -> ie/ catch1, catch2, etc...?

Any help would be appreciated!

Thanks,
Steve