problem with email server, i don't send and recibe emails, i have some errors

Hi everyone

I have a seriusly problem, i recent mount a server web with cwp7, and i can not send and recibe emails in the created domains, I do not know what happend.

When i send email, the email stays in the queue and say me (delivery temporarily suspended:connect to mail.xxxx.net[ip.ip.ip.ip]:25 Connection refused) email addressee

And when i send one mail to the email in to my server, from for example an account of yahoo.com, i recibe mail delivery error

Recipient address rejected: User unknown in local recipient table

What's happend?, Can somebody help me?

try to rebuild your mail server and if that fails then you should contact your server provider as it can be that your SMTP is blocked by them