Disable the suppression list mechanism for managed accounts (claimed accounts from verified domains)

Issue:

Currently, Atlassian suppresses user email if an email bounce occurs due to various reasons on the customer's side. This mechanism was introduced to protect our sending reputation. However, managed accounts are reliable 99.99% of the time. Therefore, it might be beneficial to permanently remove the suppression list mechanism for managed accounts.

In most cases, user emails may not be activated by the time their Atlassian account is created. As a result, their account might automatically be added to the suppression list if they receive any email from Atlassian.

Workaround: Currently, if the user is existing, admins need to reach out to support. For new users, admins can use the 'resend invitation' function to remove the user from the suppression list.