you could try this access-list command to allow users access to POP3
access-list 102 permit tcp XXX.XXX.XXX.XXX XXX.XXX.XXX.XXX eq pop3
If all the people are in the same subnet, you'd only need to add this one permit statement for the POP3.
I assume by "name based access" you are meaning accessing a switch, router or PIX with a "domain" username instead of "admin" or something. If so, you could use AAA to solve that issue.