[Spambayes] question

[Marian Hudec, Ing.]

Hi,
how can I set, that our domain is mailserver?
We have domain EO.CZ and our emails hudec at eo.cz and obchod at eo.cz is 
marked as BAD adress. (Relay access denied (in reply to RCPT TO command))


WWW.EO.CZ is e-shop and we are sending a lots of emails (not spams). 
Please don't set our adress as spam. Thank you :)

(sorry for my english)

yours sincerely  .. Marian Hudec, Czech Republic