"So my question is, is there any way that i can set it up so mail being sent to my server is on a port other then 25?"

Have them (1and1) add an MX record with your IP address.

Not directly, MX records do not support port definitions. ISPs block incoming SMTP for a reason. To get around it you need to use port forwarding, eg.:

http://support.easydns.com/tutorials/Portforwarding/

Another option is of course to get your ISP to open the port, which would probably require you to pay for the service or get a commercial grade connection package.

The MX record is key as it defines where your server is located, inbound traffic to your pop server is not dependant on port 25.  Your concern with port 25 would be the SMTP service you are running to connect to your ISP via direct or authentication.

SMTP (simple mail transfer protocol) is used for both inbound and outbound mail.  Although many people use a POP account to recieve their mail on a client computer it is compltley different from SMTP.  

In addition an MX record does not define where the web server is located that what the A record does.  However an MX record defines where the mail server is located and is by default port 25 and it appears cannot be changed except through a third party service that will redirect or forward port 25 to my server but on a non traditional port.  

However i was wondering if there was a way to manipulate the MX record.  

For example to manipulate a web server running on a non traditonal port you could type http://domain.com:8080 

but you cannot manipulate an MX record by applying mail.domain.com:2525.

CoccoBill seems to know what he is talking about.  If i was to use easydns.com would i change my MX record to go to them and then they would forward that to my server on a different port? or would i have to register my domain with them?

@taylorludwig..."In addition an MX record does not define where the web server is located that what the A record does", you're right, I brainfarted.... A record is a must and the MX record sits within the DNS entry.

What you could do, is make your W2k3 server be the nameserver and not have your registrar handle it.. This way you control  EVERYTHING. Since you already have the Exchange server, why not go all the way?

@taylorludwig...sorry about the brainfart.. I'm on my way to 200k points this month..and need to get 50k more in 2 days.

hi there

have u checked with the webhosting provider as they can provide u the option of changing ur mx records so try to check with them.

bhanu