Hi,
I am trying to send mail from Horde from my webmail but I got below error on the top of the page after clicking on 'Send' button:
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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)]
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Can someone help what could be the problem?
Thanks,
Scott