Emails not being delivered
Since update I am receiving messages about emails being undelivered. It is happening with invoices, statements and overdue invoices that I set up ages ago to send to clients as a reminder. Seeing if ...
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We are also getting the same. Spamhaus seems to be blocking MYOB/Mandrill. Most of the time the Undeliverable message contains the below at the bottom but when I click on the link the resulting page at Spamhaus says the IP address is fine.
"Diagnostic-Code: smtp; 550 5.7.1 Service unavailable, Client host
[198.2.186.20] blocked using Spamhaus. To request removal from this list
see https://www.spamhaus.org/query/ip/198.2.186.20 AS(1440)
[SY1PEPF00005A3D.ausprd01.prod.outlook.com 2025-05-16T06:05:18.355Z
08DD941D56A3A679]"
