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Re: [ietf-smtp] EHLO domain validation requirement in RFC 5321

2020-09-27 11:39:34
On 9/27/20 12:29 PM, Dave Crocker wrote:

On 9/27/20 11:04 AM, John R Levine wrote:

Anything that comes from a dynamic or NAT pool is invariably spam from a botnet.

No, because nobody is looking that closely.   It's basically just prejudice that assumes that "legitimate" senders have static IP addresses, delegation of the corresponding zone in, and the knowledge to populate the PTR records.

John L. has been correctly summarizing what members of M3AAWG have been quite consistent about, for many years.  It is part of the reason that running a legitimate mail server on the open Internet, these days, requires a significant amount of knowledge about the rather elaborate set of expected configuration and procedure.

I find that very prejudiced notion of "legitimate" offensive. "legitimate" is legitimate content, nothing more or less.


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