On 2025-06-04 at 16:44:37 UTC-0400 (Wed, 4 Jun 2025 22:44:37 +0200)
Matija Nalis <mnalis-sa-l...@voyager.hr>
is rumored to have said:

On Wed, Jun 04, 2025 at 09:34:58AM -0400, Bill Cole wrote:
The current SPF record for klovia.htt-consult.com is "v=spf1 mx -all" which
is an assertion that the domain never generates any email.

While the rest sounds reasonable, I'm not sure if this is correct?

It is definitely not correct. I somehow managed to look at that and entirely miss the 'mx' element.

AFAIK, "v=spf1 mx -all" is an assertion that domain sends mail only
via the server which is set as MX for that domain.

Correct, of course.

I.e. in this particular case, it is equivalent to
"v=spf1 a:klovia.htt-consult.com -all" or "v=spf1 ip4:23.123.122.149 -all"

which would be just fine, if that was the server which is sending
email. However, it seems that mail was actually sent by different server:
medon.htt-consult.com [23.123.122.148], which causes the SPF failure.

If both of those servers are supposed to be sending mails claiming
to be from *@htt-consult.com, then you should put both of them in SPF
record, e.g.

"v=spf1 mx a:klovia.htt-consult.com a:medon.htt-consult.com -all"

(that "mx" is not necessary, but probably won't harm, and might help
a little from the problem repeating in the case servers change in the
future)


--
Opinions above are GNU-copylefted.


--
 Bill Cole
 b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo@toad.social and many *@billmail.scconsult.com addresses)
 Not Currently Available For Hire

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