hello frends..

First of all I have a well configured apache. mail server also configured very well. But now my company bought a new server and do all configuration on new server. Old server use sendmail MTA and new server i have 2 use POSTFIX mta. i did all configuration but still cant receive from other mail server like gmail, yahoo etc. What should i do for that?
Note that New server has another Isp and also another ip address. so that both server confilict?


I have configured postfix and dovecot for mail server. I m using fedora core 7 and also get latest version of postfix and dovecot.

I have do all configuration on postfix and dovecot and also successfull relaying through local networks. But i want to dat my user can also send receice their mail from anywhere..


Please help me for above metter and tell what should i do for this.