To reduce the issue when I migrated one large forum from phpBB…
I specifically ran a query setting the digest emails to never be sent to anybody who hasn’t logged into the old forum for the past 1 year.
Out of interest - How are you confident?
For example I montior the open and click rates via Manadrill and I can see for that same Discourse install the following for the past 30 days just for digest emails:
- Avg Open rate - 38.4%
- Avg Click rate - 10.7%