[CentOS] centOS query

Dear All

I have jus migrated to centos 5 and jus wondering why n where this problem
could be


server A which is running for the past 2 years used as my primary dns and
mail server

redhat linux 8
sendmail ver-8.12.5-7
bind ver -9.2.1-9

since the server is old and is prone to all security problems i have a new
machine which i have installed the following and will replace my existing
redhat dns + mail server

centOS 5
bind-9.3.3-8.el5
sendmail-8.13.8-2.el5
mailscanner latest
spam assassin + clamav - latest
dkim filter
plus the lastest updates

now when i send a mail to my yahoo account from my old redhat server it
goes fine to inbox

I disconect my old red hat server cable and plug it new centos server
since both have the same IP's and when i send a mail from the centos
server it goes to yahoo bulk mail and not to inbox

receving is fine with both server

i am jus wondering why. even i see the DKIM filter inserts a global key (
text record of my DNS ) in my mail logs and also in the yahoo when i see
full headers in yahoo

apprecite if someone could help me




-- 
Network Administrator