Good point - thanks for highlighting this, Hans-Martin!

> Am 08.07.2023 um 09:28 schrieb Hans-Martin Mosner via mailop 
> <mailop@mailop.org>:
> 
> 
> Most likely none of you would consider adding +all to an SPF record a smart 
> move, here's another reason why you shouldn't do it:
> 
> Google cloud services are being used to spam (ongoing for a long time, Google 
> doesn't seem to care). What I noticed today is that the spammer is using 
> domains with SPF +all as sender and HELO domains, presumably hoping to avoid 
> SPF based rejections or quarantine.
> 
> This might lead to bad reputation for the domains involved...
> 
> Cheers,
> Hans-Martin 
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