Mailing lists adapted to spf long back, what hasn’t is the good old .forward 
and its more modern cousins that ask you to set a forward in email preferences 
on various webmail sites.

From: mailop <[email protected]> on behalf of Laura Atkins via mailop 
<[email protected]>
Date: Monday, 20 June 2022 at 4:46 AM
To: Dave Crocker <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [mailop] Microsoft Announces Tenant Trusted ARC Seal

I have heard, and in the past made, the “SPF breaks mailing lists” but I 
stopped saying it because it’s not true in the vast majority of cases. For 
instance, the 5321.from on this list is 
[email protected]<mailto:[email protected]>. Looking at other lists in my 
mailbox it’s similar. Mailing lists rewrite the 5321.from and thus does not 
break SPF.

It does break DMARC, but that’s another discussion.



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