It appears that Marc <m...@f1-outsourcing.eu> 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. I realize that old versions of sendmail sent those annoying "your message has been delayed, retrying" reports but I hope we all realize those are a mistake, at least for any mail system in this millenium. R's, John
