Question : Can not deliver the message I sent?

please review my old question
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Q_24769374.html#a25603591


I have windows 2003 and Exchange 2003 I can send to every one but
Whin I sent any Email from my Company (*)@zamilofshore.com to [email protected] or alexey.sidorenko@tts-consult.com its bonce back to me
___________________________________
Can not deliver the message you sent. Will not retry.

Sender:

The following addresses had delivery problems
     Reply from mail.wildpark.net[217.77.208.132]: 554 5.7.1 : Relay access denied
__________________________________

But for the same recipient from G-mail or Yahoo-mail  its OK.
What is the problem an how to solve



:(

My ISP says

[[

it seems that the cause of the problem is in the "tts-consult.com" email server. I suggest that you send them the problem and they should look into their email servers and see why are your emails being rejected.

also, I checked if your email server is being black listed but it is currently not (please ignore UCPROTECT 3) it is meaningless.

]]

Answer : Can not deliver the message I sent?

In this case it seems you are using mail.wildpark.net as outgoing mail server, but relay access is denied meaning that you don't have permission to use that server for outgoing mail. In other words you need to have correct password/login for sending mails through that server.