SMTP Error in Horde

[Andrey Kogan]

I am getting the following error on attempt to send E-mail from
test@kogan.x10hosting.com
using Horde WebMail:

There was an error sending your message: Failed to send data [SMTP: Invalid response code received from server (code: 503, response: All RCPT commands were rejected with this error: Temporary local problem - please try later Valid RCPT command must precede DATA)]

Cpanel user: kogan
Account: free hosting, no ads

Thank you,
Andrey Kogan.

 

[bugfinder]

Can you send an email to yourself? as it seems its who you are sending it to its complaining about.

 

[Andrey Kogan]

Can you send an email to yourself?

No, I am getting exactly the same message. Tried both test@kogan.x10hosting.com and just test (without quotes).
Regards, Andrey.

 

[bugfinder]

Could you try now?

 

[Andrey Kogan]

Could you try now?

Works both with local and remote address. Whatever you did, it helped, so I believe the issue is closed.

Thank you very much,
Andrey Kogan.
Edit:
Addendum: unfortunately, I still have the same error in case of E-mail account based on parked domain. I've posted it as a separate issue: http://forums.x10hosting.com/free-hosting/66428-smtp-error-horde-parked-domain.html