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

2019-12-30 07:31:46

On 30 Dec 2019, at 02:44, Keith Moore <moore(_at_)network-heretics(_dot_)com> 

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 

Aw, come on.  They have a billion users who vote with their feet if they're 

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:

And an older post, but one that I think addresses a lot of the issues addressed 

Happy researching. 

Having an Email Crisis?  We can help! 800 823-9674 

Laura Atkins
Word to the Wise
(650) 437-0741          

Email Delivery Blog:     

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