• by londons_explore on 4/2/2022, 6:46:31 AM

    Do you have the bounce message?

    It could have been your mailbox was unavailable (full? Overloaded by someone repeatedly refreshing the webmail page?). When a mailbox is unavailable, even briefly, you'll start to get mailer Daemon messages.

  • by opisthenar84 on 4/2/2022, 5:42:41 AM

    My guess: an A/B test gone wrong.