setting up an mail server

[qhimq]

Hi,

I didn't know what form to go to for this one, so I apologize. I have apache, but I don't think its an apache question.

I downloaded 'Free SMTP Server' which is a really nasty SMTP relay server program that allows 10 emails a day.

First before recommending a better server program.

I've tried a lot of different trial versions of many different smtp servers, and for all of them I am getting the same error '550 Invalid recipient' with outlook and telnet

example of error: open cmd. responses=R: input=I:

I:telnet <myipaddress> 25
R:220 localhost
I:HELO localhost
R:250 Hello localhost
I:MAIL FROM:[e-mail]
R:250 [e-mail] Address Okay
I:RCPT TO:[e-mail]
R:250 [e-mail] Address Okay
I:DATA
R:354 Start mail input; end with <CRLF>.<CRLF>
I:this is a message
I:.
R:550 Invalid recipient: [e-mail]


both emails are valid

What could be the reason for this error?