Andrew,
This is likely off topic for this list, but anyway, since I live on the
edge...
By my count there is only 3 not 10 mechanism lookups (and show me an
implementation that actually stops at 10), I'm not so sure they should
be counting the includes includes/a/aaaa's either, only the include
itself, as includes are typically out of your control (it has been a
very long time since I read that RFC so may be wrong)
Anyway, if that was the issue, it would have surfaced long before now
surely.
If I was a betting man, I'd say DNS caching is the cause, if I was a
betting man, I'd also be betting someone didnt drop a TTL when preparing
for the change, so will have to wait till records refresh.
Of course all this is assumption because OP never posted the actual
error message.
Cheers
On 19/10/2021 09:07, Andrew Oakeley wrote:
Hi,
If I was you; I would start by fixing your SPF.
This will show you the errors
https://mxtoolbox.com/SuperTool.aspx?action=spf%3aheartland.com.au&run=toolpage
Andrew
From: AusNOG <[email protected]> On Behalf Of Christopher
Scholfield
Sent: Tuesday, 19 October 2021 7:04 AM
To: 'AusNOG Mailing List' <[email protected]>
Subject: [AusNOG] Anyone knowledgeable from Mimecast here who can
contact me off list?
Yesterday we changed mail filters, Mimecast is the only email provider
that has been rejecting our emails due to SPF problems for the last 20
odd hours. Mimecast technical support has told me their customers who
aren't getting our emails need to contact them so their tech support
can explain how to bypass their mail filters for our mail server.
I'd rather work with someone at Mimecast to resolve the cause of the
problem.
--
Regards,
Noel Butlerimplimentation
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