Hi Jim,

I am not into all details, but why not using an email adress, such as 
e...@example.com?

My understanding of RFC2606 is, that you can use example.com/org/net for that 
purpose, too, as they are reserved TLDs.

empty.as112.arpa has no MX record, too, therefore, I don‘t get the advantage of 
it.

Best,
Tobias

> Am 22.07.2021 um 18:06 schrieb Gould, James 
> <jgould=40verisign....@dmarc.ietf.org>:
> 
> 
> There is one TBD item that exists in section 5.3.2 of 
> draft-ietf-regext-epp-eai related the “predefined placeholder email” that is 
> used by the EAI supporting server and EAI supporting client where the 
> opposite party doesn't support EAI.  In both cases a valid email value needs 
> to be provided to a non-EAI supporting client or server to satisfy a required 
> email property when all that is available is an EAI value.  To satisfy this 
> requirement, a predefined placeholder email needs to be selected that meets 
> the requirements:
>  
> 1.      A syntactically valid email address to pass client or server 
> validation logic.  
> 2.      A non-EAI email address since the client or server doesn’t support 
> EAI email addresses.
> 3.      A single value that can indicate the lack of EAI support to the 
> client or server.
> 4.      An email address that is blackholed and never delivered.
> 5.      Use of the email address will not cause operational issues.
>  
> RFC 7535 defines a blackholed domain name with EMPTY.AS112.ARPA, which can be 
> leveraged for the EAI predefined placeholder email.  The proposal is to 
> define the “predefined placeholder email” value as e...@empty.as112.arpa.  
> This value looks to meet the requirements.  We are looking for feedback from 
> the working group as well as experts outside of the working group to help 
> determine whether the value does meet the requirements and whether there are 
> additional requirements that need to be considered.  Once the predefined 
> placeholder email is agreed to, the draft will be updated to define the 
> predefined placeholder email value and use that value to replace the existing 
> TBD values in section 5.3.2 of the draft.
>  
> Thanks, 
>  
> -- 
>  
> JG
> 
> <image001.png>
> 
> 
> James Gould
> Fellow Engineer
> jgo...@verisign.com
> 
> 703-948-3271
> 12061 Bluemont Way
> Reston, VA 20190
> 
> Verisign.com
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