SPF TempError during DNS lookup persistant

Hi,

we're getting an error when sending a mail from a non-microsoft-server (***domain is removed from privacy***) to a Office365-mailbox. The mail contains following message:

"Dieser Absender hat unsere Tests zur Betrugserkennung nicht bestanden und ist möglicherweise nicht der, der er zu sein scheint. Weitere Informationen über Spoofing"

The mail header contains a hint:

 > received-spf: TempError (protection.outlook.com: error in processing during lookup of ********: DNS Timeout)

But his error isn't temporarily, we've got it multiple times an the DNS server is working and returns correct SPF record (v=spf1 a mx include:spf.protection.outlook.com include:*******.com include:spf.******* -all). The "a" is included to allow ***domain is removed from privacy*** sending mails.

What can we do to avoid the spoofing message?

Regards,

Alex.

Answer
Answer

Hi Alex,

Could you please add your server's IP directly to SPF record (not use A record of the domain) of domain in Office 365 and check if it helps?

The example SPF record look like: v=spf1 ip4:**.*.*.* include:spf.protection.outlook.com ~all

where **.*.*.* is your public IP address

Thanks,

Baron

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Question Info

Last updated March 31, 2021 Views 6,241 Applies to: