Hi, just realised that I ( or anyone else in the organisation)  cannot receive any new mails. When someone is sending me an email, he /she is getting the following error. My domain is gifkaro.com. However, using my other email address as Zoho one isn't working.

Reporting-MTA: dns;  googlemail.com

Received-From-MTA: dns; xxxxxx @aaplabs.com

Arrival-Date: Mon, 22 Jul 2019 03:46:31 -0700 (PDT)

X-Original-Message-ID: <8cba0e54-7d28-4db5-92e4-509dcaad22ad@Spark>

Final-Recipient: rfc822; xxxxxx @gifkaro.com

Action: failed

Status: 5.1.1

Remote-MTA: dns;  inbound-smtp.us-east-1.amazonaws.com. (205.251.243.46, the

 server for the domain  gifkaro.com.)

Diagnostic-Code: smtp; 550 5.1.1 Requested action not taken: mailbox unavailable

Last-Attempt-Date: Mon, 22 Jul 2019 03:46:34 -0700 (PDT)