Postfix receive mail problem

[dusi124]

Hi!

I have a problem with postfix. It isn't receive mails from other server, but when I send a mail from localhost to localhost, it works perfect.
My domain name's mx record is on my server, so the problem is not the domain.
I haven't got local nameserver. And my server use the google's public nameservers (8.8.8.8 and 8.8.4.4) thats can be the problem?

Thx for answers, and sorry for my bad english.

Edit:
When I try send a message to test@mydomain.hu, I become this reply:

teszt@mydomain.hu
SMTP error from remote mail server after RCPT TO:<teszt@mydomain.hu>:
host myip [myip ]: 550 5.7.1 <teszt@mydomain.hu>:
Recipient address rejected: temporarily blocked because of previous errors - retrying too fast. penalty:
30 seconds x 0 retries.