valid RCPT command must precede DATA

[outpernet]

When i try to send an email to an account in a DA server, it bounce back with:

----- The following addresses had permanent fatal errors -----
<----@----.com>
(reason: 550 authentication required)

----- Transcript of session follows -----
... while talking to mail.------.com.:
>>> DATA
<<< 550 authentication required
550 5.1.1 <------@-----.com>... User unknown
<<< 503 valid RCPT command must precede DATA

User and all stuff is well created..

[nebukazar]

Hi,

did you enabled my server require authentification under your emai client ?

[outpernet]

The problem is for receive, not for send. (im sending from another server no DA based)