I do not send emails very often (10 - 20 times per week average).
Since January I keep getting responses such as the below:
This message was created automatically by mail delivery system.
THIS IS A WARNING MESSAGE ONLY.
YOU DO NOT NEED TO RESEND YOUR MESSAGE.
The original message was received at Tue, 14 Jan 2020 12:42:28 -0800
from sean@mxx.com [sean@mxx.com]
----- The following addresses had fatal errors -----
[Status: Error, Address: <cxxxe@cxx.ie>, ResponseCode 451, 4.7.500 Server busy. Please try again later from [136.143.188.52]. (AS77713324) [AM5EUR02FT046.eop-EUR02.prod.protection.outlook.com]]
Message will be retried for 4 more day(s)
Reporting-MTA: dns; mx.zohomail.com
Arrival-Date: Tue, 14 Jan 2020 19:57:08 +0000
Original-Recipient: rfc822; "Cormac Malone" <Cxxxe@cx.ie>
Final-Recipient: rfc822; cxx@cxx.ie
Status: 451
Action: failed
Last-Attempt-Date: 14 Jan 2020 20:42:28 GMT
Diagnostic-Code:
----- Transcript of session follows -----
Received:from mail.zoho.com by mx.zohomail.com
with SMTP id 1579031828699604.6943826669584; Tue, 14 Jan 2020 11:57:08 -0800 (PST)
Message-ID:<16fa5a198b7.10d4a95aa284168.8154492458502650666@mxxx.com>
Date:Tue, 14 Jan 2020 19:57:08 +0000
Is there a problem with Zoho? Why are my messages not being received?
Thanks,
Seán