Hi,

It was well more broken earlier, not just the lookup numbers. This was the 
earlier state. I was not nit picking. This was proper broken.

v=spf1 _spf_useast2.prod.hydra.sophos.com  ip4:124.158.19.168/29 
ip4:124.158.19.128/29 include: carsales.com.au emailus.freshservice.com -all

Andy


From: AusNOG <[email protected]> On Behalf Of Noel Butler
Sent: Tuesday, 19 October 2021 10:11 AM
To: [email protected]
Subject: Re: [AusNOG] Anyone knowledgeable from Mimecast here who can contact 
me off list?

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 <mailto:[email protected]> On Behalf Of Christopher 
Scholfield
Sent: Tuesday, 19 October 2021 7:04 AM
To: 'AusNOG Mailing List' <mailto:[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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