Re: More Sendgrid trouble?

On 20250509 02:46:14, Matija Nalis wrote:
> On Thu, May 08, 2025 at 05:22:32PM -0400, John Levine wrote:
>> It appears that Marc<[email protected]> said:
>>>> Yeah, at this point, if I get anything from Outlook, Yahoo, Google,
>>>> Mailchimp, Mailgun, OVH, or Sendgrid and it’s not a explicitly a
>>>> whitelisted entry, I bounce it.
>>> I used a greylist where emails get a 4xx message with a link that allows the email through ...
>> Why would a mail system tell senders about a 4xx reply?  That means to try again, not to bounce it.
> In a good old times, people had expectations of computer systems that
> they will perform their function.
>
> Not only did people fully expect that e-mail they sent would be
> delivered, they would expected it would be delivered promptly.
>
> If it even got delayed by few hours, that was considered a serious
> problem, and a reason to call up the postmaster on another side and
> inform them to fix their system.

Please excuse me, but what world do you live in? Since day one email delivery 
has been best effort and not guaranteed, even on (some) RBBS systems running on 
the likes of CP/M on 8080s before ARPANET and all that fuzz.

Perhaps cooling off, despite being on a splendid roll there, would let your mind 
wander enough to better real solutions to your problems. (Which probably include 
me. But, I just could not permit that whopper to float by without comment.)

{^_^}   Joanne - who was there with modem then.