Re: mail.protection.outlook.com - dns issues?

On 2019-01-11 13:26, Tobias Goeller wrote:
> Hi All,
> 
> Anyone else having problems with customers using mail.protection.outlook.com or spf.protection.outlook.com in their SPF Records?
> 
> Just asking (both records seem to be not resolvable at the moment...)

$ dig +short spf.protection.outlook.com txt
"v=spf1 ip4:207.46.100.0/24 ip4:207.46.163.0/24 ip4:65.55.169.0/24 
ip4:157.56.110.0/23 ip4:157.55.234.0/24 ip4:213.199.154.0/24 
ip4:213.199.180.128/26 ip4:52.100.0.0/14 
include:spfa.protection.outlook.com -all"

Looks fine to me...


As for the other, you are supposed to use:

"The MX record for a domain that's enrolled in Exchange Online uses the 
syntax <domain>.mail.protection.outlook.com."

See:
https://support.office.com/en-us/article/fix-email-delivery-issues-for-error-code-550-5-4-1-in-office-365-7dcf7a8b-e00e-49f8-bf8d-74aba79c5a6a

Greets,
  Jeroen


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