Microsoft missing public DNS TXT entry for DKIM records (msn.com)

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It appears that Adam Brenner via NANOG <adam at aeb.io> said:
>mail server. Our mail server checks if DKIM email headers are present 
>and if they are, tries to validate them. If the check fails, we reject 
>the message.

MSN's setup is broken but let me strongly reiterate the advice DON'T DO THAT.

If a DKIM signature isn't valid, you ignore it.  If you do anything else,
as you have just discovered, you will be sorry.

R's,
John

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