Any idea what might be happening here? I've been using iCloud as my mail email account for a few weeks now and I started having problems today. Anyone else? What does the error indicate?
<myemailaddress@icloud.com>: host mx01.mail.icloud.com[IP address] said: 550 5.1.1
<myemailaddress@icloud.com>: user lookup success but no user record found (in
reply to RCPT TO command)
Reporting-MTA: dns; smtp.sitesendingmetheemail.com
X-Postfix-Queue-ID: 792EB1388D5
X-Postfix-Sender: rfc822; support@sitesendingmetheemail.com
Arrival-Date: Mon, 26 Apr 2021 15:38:48 +0000 (UTC)
Final-Recipient: rfc822; myemailaddress@icloud.com
Original-Recipient: rfc822;myemailaddress@icloud.com
Action: failed
Status: 5.1.1
Remote-MTA: dns; mx01.mail.icloud.com
Diagnostic-Code: smtp; 550 5.1.1 <myemailaddress@icloud.com>: user lookup success
but no user record found
<myemailaddress@icloud.com>: host mx01.mail.icloud.com[IP address] said: 550 5.1.1
<myemailaddress@icloud.com>: user lookup success but no user record found (in
reply to RCPT TO command)
Reporting-MTA: dns; smtp.sitesendingmetheemail.com
X-Postfix-Queue-ID: 792EB1388D5
X-Postfix-Sender: rfc822; support@sitesendingmetheemail.com
Arrival-Date: Mon, 26 Apr 2021 15:38:48 +0000 (UTC)
Final-Recipient: rfc822; myemailaddress@icloud.com
Original-Recipient: rfc822;myemailaddress@icloud.com
Action: failed
Status: 5.1.1
Remote-MTA: dns; mx01.mail.icloud.com
Diagnostic-Code: smtp; 550 5.1.1 <myemailaddress@icloud.com>: user lookup success
but no user record found