[MM3-users] Re: Speed up importing mailman2 lists

The trick to zero delivery downtime is that you can configure your MTA to route to Mailman 3 if the list exists there, if not route to Mailman 2 if the list exists there, and if not continue to any lower priority routes. It worked as designed (mops sweat off brow ;-).

Can you tell me how to implement this in Postfix? I was thinking of using a script to query the mailman3 api for incoming mail to see if the list exists there and to route the mail to mailman2 or mailman3 depending on the answer. However, I don't quite know how to teach this to postfix yet