Over time, old users' email addresses might start to bounce. Implement way to give up reaching users when their email keep bouncing.
Thoughts:
We should allow the odd bounce before giving up completely.
We shouldn't delete accounts of users who are still part of active organisations, and/or log in regularly. Perhaps a "invalid email" field that stops us sending emails and lets us implement a "could you please update your email" popup on login would be a better solution.
Over time, old users' email addresses might start to bounce. Implement way to give up reaching users when their email keep bouncing.
Thoughts:
@mnowster @morancj