On 2020-04-30 02:43, Mark Andrews wrote:
And it is still on going. Just got 4 of these.
Mark
Technical proposal how to solve that.
At 1st of month send monthly reminder manually, to each subscriber, but
encode recipient address in Reply-To: a bit special way.
First, you need catch-all alias on special domain.
Then, you calculate reply-to, for example if destination recipient:
hash("secret-keyword" + u...@domain.com)=aabbccdd
So, it becomes:
Reply-To: aabbc...@monthly.nanog.org
Then just check all bounces received to *@monthly.nanog.org, and
unsubscribe relevant users.
