In article
<945d2baf-c5a9-fb9e-4563-93dff1824102(_at_)network-heretics(_dot_)com>,
Keith Moore <moore(_at_)network-heretics(_dot_)com> wrote:
Thanks for providing a list, though I wonder if this is the same as the
list that John referred to.
It's close enough.
I do suspect that the list could use some updating.  For example:
On 10/4/20 1:52 PM, Richard Clayton wrote:
For the next few years however:
* Use a static IPv4 address for your email system
IMO this should change to support the reality that IPv4 addresses are
getting scarcer by the day, especially in some parts of the world.Â
It's true, if you want a /16, you have to pay a lot of money for it.
On the other hand, you can rent a VPS with a unique public IPv4
address from any of a zillion places for a few dollars a month, so
"scarce" is a matter of perception.
Keeping in mind that the point of a standard is to interoperate, I
think it would be a good idea to offer advice that actually helps, you
know, to interoperate. The reality is that if you send mail from a
static address with matching forward and reverse DNS that doesn't look
generic and EHLO as that DNS name, you'll have a lot more success
getting your mail delivered than otherwise. (That's equally true for
IPv6, of course.) It'd be an a self-inflicited injury for us to tell
people otherwise.
--
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Primary Perpetrator of "The Internet
for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly
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