bind+postfix+courier+sals+amavis+spamassian+pop3+mysql+apache+smtp-auth

[tethys ocean]

Hi all,

I want to setup a mail server Freebsd 5.3 bind 9.0 (dnscahce)
+mysql4.0+postfix2.2.20040829,2+courier+sasl  etc....

in the beginning of my installation I am taking such error message 

courier-mysql-0.45.4 conflicts with installed pakages(s)
postfix-2.2.20040829,2

They  install files into the same places.
Please remover..................................

What can I do? I looked a lots of document but I coulnt actual solutions..

any comment?!

Thanks a lots