I checked our traffic and we don't have any recent relevant errors from
their MX, and we, too, also use ProofPoint's Hosted SPF macro.
I think I may have found the potential issue though, <sending orgs> TXT
RR is /_*extremely*_**/large (3,652 bytes). It's possible
Wisconsin.gov's MX is running into TCP fragmentation issues with the DNS
query response size for the domain's SPF record. If I were you, I'd take
a look at the feasibility of removing the several dozen SFMC validation
records in there to reduce the size.
- Mark Alley
On 7/10/2025 2:03 PM, Carter, Jason (Chief Technology Office) via mailop
wrote:
Anyone else getting weird SPF validation errors emailing
@wisconsin.gov addresses starting this week?
Our SPF record is fine and contains the correct information, but yet
we are getting weird errors back every time our domain sends them a
message.
The message kind of goes like this (where the sending address,
recipient and our IP is in the removed for privacy section):
*"REMOVED for PRIVACY*" was identified in our logs as resulting in an
Error during the Sender Policy Framework (SPF) verification check.
An SPF record is part of your mail system's DNS records, so you'll
need your DNS administrator to make corrections to your SPF record in
your DNS record.
You can verify SPF records here:
https://www.kitterman.com/spf/validate.html in the "Test an SPF
Record" section.
If changes are not made to how you're sending these messages, they
won't be delivered when SPF is enabled. Messages that Fail or result
in an during the SPF validation check will be quarantined and not
delivered.
If you do not understand what SPF and DNS are, please contact your IT
staff for assistance.
Of course, even using their suggested tool it says our SPF is fine.
We do use SPF macro and have for years so I am thinking their system
lacks the ability to interpret SPF macros.
*Jason Carter*
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