[PERDITION-USERS] Username Translation Question

Hi I am not 100% sure this is possible with Perdition but if I explain what I need to do maybe someone could offer some advice. I am moving some customers from one POP server to another. The old POP server has usernames in the format "username" The new POP server uses the format "username(a)domain.com" I have about 50 different domains on these servers with approx 1000 users so I am trying to avoid getting all users to have to change there POP usernames I was hoping I could perform the translation with Perdition, i.e. 1. User pops with "username" 2. Perdition looks up username and uses "username(a)domain.com" against the new server I was trying to use username:username@domain.com@1.2.3.4 (where 1.2.3.4 is the IP of the new POP server) in the pop map, but I dont think it is reading this correctly and is just using username see below Feb 7 12:18:20 paris perdition[5628]: Auth: 5.6.7.8->9.10.11.12 user="paulh" passwd="XXXXXX" server="1.2.3.4" port="110" status="failed: Re-Authentication Failure" I would be very grateful for any advice/pointers. Kind Regards Paul