We just discovered this issue on our end as part of re-activating an individual’s “Invalid Account” email in BBIS, and as I did not see anything related to this currently posted, I thought I would share in case anyone else was unaware.
Apple – Support appears to have had an outage back on 04/26/21, and as a result, an email that we sent out during that time via BBIS appears to have hard bounced on email addresses ending in @mac.com, @me.com, and @icloud.com. As a result, all 447 of these email accounts were flagged as hard bounce with a message similar to “550 5.1.1 <example_email@icloud.com>: user lookup success but no user record found”.
We are going to have to go through manually and re-validate these accounts in BBIS (unless anyone has a recommendation on how to do this via mass update, but my understanding is this is a one-by-one manual look-up via BBIS Invalid Account and change). You might check you bounces on any email communications sent out on 04/26/21 to see if you encountered this same Apple outage issue with email recipients.
