We should get civi to handle its own bounces

Our torproject.org newsletter goes out from the address info@torproject.org which doesn't really exists.

This means that when an address bounces we don't get to know that it has in fact bounced. This unless CiviCRM has a way to handle bounces?

How do we know is the address we send emails via Civi are still valid?

Update: we seem to agree we need Civi to handle bounces. Those are the next steps:

1. get approval from @isa to fund GiantRabbit to work on this - approved informally by email
2. figure out the best way to implement this (forward email? forward email + dovecot on the crm server?) - @giantrabbit - they want an IMAP mailbox somewhere
3. @tpo/tpa configure an IMAP server on crm-int-01.torproject.org
4. @giantrabbit make CiviCRM talk to the IMAP server
5. one of those:
   • forward info@torproject.org to civicrm@crm.torproject.org or giving@torproject.org
   • make outgoing email come from civicrm@crm.torproject.org or giving@torproject.org <- this was done.
6. monitor the mailing
   • Grafana dashboard watching the two main mailservers
   • Place to enable/disable mailing (grep for Send sched...)
   • Where the batches are defined
   • Progress report as of 2021-02-04 16:43UTC, before bumping to 500/batch
     • Success: 72632 (25.59%)
     • Bounces: 3867 (1.36%)
     • Unsubscribed: 46 (0.02%)
     • Opt-out: 29 (0.01%)
   • Final report:
     • Success: 269303 (94.88%)
     • Bounces: 14515 (5.11%)
     • Unsubscribed: 250 (0.09%)
     • Opt-out: 203 (0.07%)