When a new user account is set up, a confirmation email is automatically sent to the login address for the account. Currently, if this message is bounced, the user's email address is immediately placed on your block list.

So - I create a new staff email account in 365, then use that email address to set up a Box account. Box immediately sends a confirmation email message - but 365 is having a slow day and the gateway hasn't yet caught up with accepting messages for that address. The confirmation message is bounced, and the user's email address is immediately placed on your block list.

The problem is that I (as the Box and 365 admin) have no way of knowing this. Box does not inform me that it has happened - it simply offers me the option to resend the confirmation email, and does not tell me that this option can never work because the address is being blocked behind the scenes. So I waste many hours trying to trace the messages in 365, and to find out why they haven't arrived. I resend from Box several times, with the same result.

This is stupid, in three different ways:
1: When sending email messages of any kind, all sensible systems wait and retry at least once before deciding that the message has failed. Why doesn't Box do this before placing an address on a hidden blocklist?

2: As admin/co-admin I really need to know when one of my user account login addresses is being blocked by Box - but I have no way of finding this out.

3: As the Box account creator, I really need to know when the confirmation email message has bounced back, because it means that the account creation has failed and the user will not be able obtain a password, even if I try (apparently successfully) to resend the confirmation. Your system does not notify me when it blocks an account signup email address.

Please implement at least one of the following:

A: When a confirmation message for a new account is bounced, send a notification to the admin/co-admin who tried to create the account that this has happened, and how to resolve it.

B: When an email address is being blocked, it makes no sense to present admins/co-admins with a link to send any kind of message to it. Please stop doing this.

C: When a new account confirmation email is bounced, please wait 15 minutes and retry before blocking the address.

D: Give admins/co-admins access to the list of emails in their domains which are on your blocklist - even if this access is read-only. At least then they can see what the problem is, and contact support to have an address removed.