The Sender domain and SPF record involved was under the following:
response.email.cc.yahoo.com
... Which appears to be zetaglobal, true.
Thanks,
Mark.
On 6 June 2025 12:56:34 am NZST, Bill Cole via mailop <[email protected]> wrote:
>On 2025-06-05 at 02:50:17 UTC-0400 (Thu, 5 Jun 2025 18:50:17 +1200)
>Mark Foster via mailop <[email protected]>
>is rumored to have said:
>
>> Anyone from Yahoo out there?
>>
>> My mail platform refused an email from Yahoo today (an account notification
>> sent to an alternate contact address linked to a yahoo.com account) because
>> the IP address doing the SMTP delivery was outside the SPF record (an
>> adjacent subnet) i.e. there's an error in the relevant SPF record; there's
>> many ip4:96.47.26.x addresses in the SPF record, but the inbound connection
>> came from 96.47.25.0/24... so obeying the -all had negative consequences.
>
>I don't see either of those blocks in the yahoo.com SPF record. Both are
>registered to "E-Dialog," which is an archaeological name for an entity now
>doing business as Zeta (zetaglobal.com.)
>
>What SPF record are you referring to?
>
>> As a mere yahoo.com free-tier customer i've no idea how to pass this
>> information to someone with cloo, but I can't be the only one who (nearly)
>> missed an important notification due to an apparent misconfiguration and/or
>> SPF record being incorrect.
>
>FWIW, all of the mail I've seen in recent months from those 2 /24 nets is sent
>using what are presumably the domains of Zeta customers, without anything
>referencing Yahoo.
>
>Tangentially, Zeta seems to be an example of an ESP doing things right
>spam-wise. I had no idea they were as big as they are until I looked for their
>nets in logs. I've never had a user complain about mail from them, despite a
>steady flow from their nets using many different sender domains.
>
>
>--
> Bill Cole
> [email protected] or [email protected]
> (AKA @[email protected] and many *@billmail.scconsult.com addresses)
> Not Currently Available For Hire
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