On which partition?

Last time I wrote the script for Messaging Server backups I faced the problem with proper partition selection. It's easy to achieve with a mboxutil utility... but I only need the names of the account and a corresponding partition.

Up to today I've used the solution with sed & awk. But I hate using many tools where the swiss army knife is available.
So...

# mboxutil -l -x| sed 's/.*user\/\(.*\)\/INBOX.*partition\/\(.*\)\/\=user\/.*/\1 \2/p;d'
admin primary
marcin.wisnios@somedomain.com secondary