On Nov 10, 2020, at 1:40 PM, Mark Sapiro <mark@msapiro.net> wrote:
Brian specified:
verp_personalized_deliveries: no
Doesn’t that default back to regular mass delivery, as opposed to individualized VERPed envelopes, which mandates individual deliveries?
That depends on the setting of verp_delivery_interval. If verp_delivery_interval = 1, every message will be VERPed regardless of verp_personalized_deliveries. If verp_delivery_interval = 0 and verp_personalized_deliveries = no, deliveries won't be VERPed as you note. If verp_delivery_interval = 0 and verp_personalized_deliveries = yes, only personalized deliveries (i.e. individual messages, not digests, from lists with Personalization enabled) will be VERPed.
The theory is VERPing has a cost because it requires a separate message sent to each recipient rather than a single message with multiple recipients, but personalization also requires a separate message sent to each recipient, so those can be VERPed at no extra cost.
But to be clear, automated bounce processing does not require VERP. It just works a tiny bit more reliably with VERP.
Great explanation - thank you.
- Mark
mark@pdc-racing.net | 408-348-2878