Re: [Emailcore] Ticket #8: Need a registry of header fields that are Ok to add after submission

[Michael Peddemors <[e-mail]>]

On 2020-11-16 9:10 a.m., Alexey Melnikov wrote:
> b) I believe John asked whether this should be "First Come First Served" 
> or "Expert Review". I proposed to do the latter to make sure that 
> somebody checks that a particular header field is indeeded added during 
> relay/final delivery/both. The review process can be lightweight.

While this may be an attractive notion, it will generate critisicm if 
the IETF gets to be the 'police' of which headers are allowed.

AS well, the industry routinely starts using new headers for various 
purposes, and it isn't always feasible to wait on an 'approval' that the 
header is accepted..

While the use of X- headers appears to be no longer encouraged, that was 
a simple way for vendors to add new trial headers safely.

While this 'might' have some benefit in stopping those spammers that 
insert random headers, in the misguided belief that it will help get 
around various filtering or beysean tests, that number is relatively low.

There are a lot more proprietary headers out there, only used by a 
single vendor..

I don't think this is a 'cut and dried' benefit, so yes, it should 
undergo at length discussions..

And there will always be some in the industry that might be concerned 
that the 'Expert Review' might have some prejudicial positions, whether 
true or not.  The only problem with first come/first serve, is that this 
would open the door to abuse, as well becoming a very large list.

My thoughts..


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