Big Problem with mail forms.

Hi.
I have a problem with my mail forms in my system.
When i am trying to send a mail from a mail form happens the following:
a. the mail form is very slow dual the prossecing.
b. In the end the message said that the mail has been sending but i never take the message

So i gave you some elements, maybe help you to help me

1. My ISP have gave to me 1 static IP
2. My ISP is my domain registar too. So, he forwarding all these domains to my static IP.
3. I have set up in my server the FC4 following the Perfect Setup Tutorial.
4. I have installed the Ispconfig too.
5. I have setting up my host name as host.arcadia.gr


Somewhere i read that the proble is possible in the DNS

So my questions are the following :
A. When i give in Internet Explorer bar the domain host.arcadia.gr how is possible to appear my server page;

B. Am i need dns servers? And if yes, is it possible to use my static IP or i need to put the DNS servers of my provider?

C. If i have a domains from an other registar how will be the forwarding to my static ip?



Thank you very much!

 

All my maillog file has the following error :

Jun 11 23:59:37 host postfix/qmgr[10353]: 9513A58E3E8: to=<[email protected]>, relay=none, delay=347782, status=deferred (delivery temporarily suspended: connect to mx-p1.uol.com.br[200.221.4.68]: server refused to talk to me: 421 sola1.uol.com.br Error: too many connections from 213.5.208.2 )

 

Is this your IP address? 213.5.208.2
Make sure your server isn't abused by spammers.

 

I have the same error, but its only with uol's servers.. may be they are too concern about security...

 

This can happen if you have a dynamic IP address, if you don't have proper PTR and SPF records, or if you're being abused by spammers. I'd contact AOL and aks why it happens in your case.