Re: [ietf-smtp] Possible cont4ibution to moving forward with RFC5321bis SMTP

[Laura Atkins <[e-mail]>]

> On 30 Dec 2019, at 02:44, Keith Moore <[e-mail]> wrote:
> 
> On 12/29/19 9:31 PM, John R Levine wrote:
> 
>>> So they're not subject to outside scrutiny.  No wonder email delivery is so unreliable.
>> 
>> Aw, come on.  They have a billion users who vote with their feet if they're unhappy.
> 
> Sure, because changing email addresses (or services, for those who have their own domain names) is easy for everyone.

30% of email addresses on a marketing list go bad every year. It doesn’t seem that changing email addresses is that problematic. 

> But yes, my response was a bit flippant. I do acknowledge that there's a kind of expertise that people who deal with large volumes of traffic on a daily basis, have, that others generally do not have.

>> Nothing personal but I cannot imagine why someone running a large mail system would care what you or I thought of their filtering scheme.  They have way more data than we will ever have.
> 
> I'd be curious as to their measurement methods, but I suppose those are also kept secret.

There is an entire sub-section of computer science publications (many of them peer reviewed documents, others whitepapers, still others theory document) that address these issues. Perhaps a few hours with google or at your local library will give you some insight into the research being done and published. 

Both Google and Microsoft also publish information about what they’ve learned about filtering and how they address issues. A recent google post: https://cloud.google.com/blog/products/g-suite/ridding-gmail-of-100-million-more-spam-messages-with-tensorflow <https://cloud.google.com/blog/products/g-suite/ridding-gmail-of-100-million-more-spam-messages-with-tensorflow> 

And an older post, but one that I think addresses a lot of the issues addressed here: https://elie.net/blog/security/in-depth-analysis-of-the-lessons-we-learned-while-protecting-gmail-users/ <https://elie.net/blog/security/in-depth-analysis-of-the-lessons-we-learned-while-protecting-gmail-users/>

Happy researching. 
laura 

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