my ip address listed spam (exchange server 2003 problem)

[abdoelmasry]

Hi men

i have big problem with microsoft exchange server 2003

i installed exchange server as main mail server to use it on in company

i have static real ip address

im sending and receiving mails good but

after few houres i got aproblem

exchange server not sending to yahoo mail .. ,

i checked spam records in www.dnsstuff.com

i found that my ip listed spam ., im not sending any spam

i changed my ip address and every this is good

after some time .. exchange server not sending to msn and gmail mails

my new ip address is listed spam , my work completely depending on mails

my work was hanged up

i think this problem happens when local clients in local area sending spam .cos of we are all using the same ip address

any help please

i want to know .. why my ip always fall in listed spam ,

how i can peotect my server from spam list servers ,

what is the valid way to send and recieve email to my server without problem .

[kenobewan]

Not sure why you believe this is an IIS question. Are you sending SPAM?

[abdoelmasry]

hi kenobewan
ok
you can tell me what it be ..

microsoft exchange server 2003 is SMTP/POP3 server to send and receive emails

may be some one sent spam from another pc on my lan

i don't know when my message will be spam , i think if i sent email carrying another domain name ..
is it ?

i need to know what is happening makes my ip address always listed spam