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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(192, 50%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EM9%3C/text%3E%3C/svg%3E)
Please help me resolve the following "temperror" which leads to SPF failure.
This error only occurs when sending to 'Enterprise Outlook'. Not to 'Outlook.com' or any other recipient.
See attached image for error.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(198.4, 10%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
Hi @MP
Welcome to our forum!
For a better study, please provide more details about this case:
Does the problem occur in the Outlook desktop client?
Under what circumstances did you encounter this issue?
What is your account type (POP/IMAP/Exchange）?
What's the version of your Outlook? (File > Office Account > About Outlook). Please make sure you have upgraded your Outlook to the latest version.
The compliant is about incoming email, not email I am sending.
I have a self-hosted email server, and this sender uses Microsoft Exchage. I don't know how this person sends me emails.
Hi @MP
Thanks for your reply!
Do you mean there is a problem with the attachment on the received email?
Try checking whether the email is working properly on the web client.
The error in the XML-file above does not refer to any email attachment. It's information from the DMARC-provider of my email account, on my self-hosted email server.
It refers to SPF failures when sending emails to accounts hosted on 'Enterprise Outlook'. Not to 'Outlook.com' or any other recipient.
I checked and tested my email server and email account setup (SPF, DKIM, DMARC, MTA-STS, TLS, blacklisted domain or IP-address, etc.) thoroughly and I can't find any problems.
Finally, I emphasize that this problem only occurs when I send to accounts hosted on 'Enterprise Outlook'. Not to 'Outlook.com' or any other recipient (eg. Gmail accounts).
Hi @MP
Finally, I emphasize that this problem only occurs when I send to accounts hosted on 'Enterprise Outlook'. Not to 'Outlook.com' or any other recipient (eg. Gmail accounts).
What does this 'accounts hosted on 'Enterprise Outlook' mean?Are you configuring your account to the Outlook desktop client?
Is there a problem with only a specific message?
My DMARC-provider (mailhardener.com) distinguishes between 'Outlook.com' and 'Enterprise Outlook'.
I'm not sure if that's relevant, but I wanted to let you know.
Hi @MP
Thanks for following up.
When the destination email system checks the valid email sources in the SPF record, SPF validation fails if the check requires too many DNS lookups. For more information, see the Troubleshooting SPF TXT records section later in this article.
Hi @MP
Is there any update on this case?
Please feel free to drop us a note if there is any update.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(201.6, 28.999999999999996%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHT%3C/text%3E%3C/svg%3E)
I don't see anything wrong with your DNS records, It all lines up, I think the enterprise organization is having a DNS issues looking up your SPF record (temperror).
You can try reducing the lookup and just us this v=spf1 ip4:144.21.34.219 ~all
Instead of v=spf1 include:mail.marcpels.com ~all which will reduce a lookup.
Anytime you make a change to DNS test it with an eMail Tester, always double check.
I have change my SPF and haven't received any SPF-errors since.
This ticket can be closed.
New SPF: v=spf1 ip4:144.21.34.219 ~all