Hello,

I have a problem with forwarding emails from adress david(dot)frid(at)corax(dot)cz to my Zoho email adress david(at)frid(dot)cz.
This is an error message that returns:

   ----- The following addresses had permanent fatal errors -----
<david@frid.cz>
    (reason: 541 5.4.1 Mail rejected by destination domain)

   ----- Transcript of session follows -----
... while talking to mx.zoho.com.:
>>> RCPT To:<david@frid.cz>
<<< 541 5.4.1 Mail rejected by destination domain
554 5.0.0 Service unavailable
>>> DATA
<<< 503 No recipients specified
451 4.4.1 reply: read error from mx.zoho.com.

Reporting-MTA: dns; corax.corax.cz
Received-From-MTA: DNS; localhost
Arrival-Date: Mon, 18 Sep 2017 16:49:53 +0200

Final-Recipient: RFC822; david@frid.cz
Action: failed
Status: 5.0.0
Remote-MTA: DNS; mx.zoho.com
Diagnostic-Code: SMTP; 541 5.4.1 Mail rejected by destination domain
Last-Attempt-Date: Mon, 18 Sep 2017 16:49:55 +0200

What is wrong?

Regards, 

David Fríd