On 9/11/24 01:44, Danil Smirnov via Mailman-users wrote:
Hi Mark,
ср, 11 сент. 2024 г., 06:26 Mark Sapiro <mark@msapiro.net>:
On 9/8/24 01:04, unite42--- via Mailman-users wrote:
[mta] verp_confirmations: yes verp_personalized_deliveries: yes verp_delivery_interval: 1
What is the background of these recommendations?
These settings enable VERP for all list messages. This results in more reliable bounce processing.
Is there any downsides of using it, so it's not enabled by default?
With verp_delivery_interval set to 1, Mailman delivers a separate VERPed message to the MTA for each recipient whereas without this, Mailman delivers one or a few messages with multiple recipients each. This can have a performance impact.
This is not a consideration for confirmations or personalized deliveries as those messages have only one recipient per message in any case. I.e., there is no performance impact from setting
verp_confirmations: yes verp_personalized_deliveries: yes
This is not the default because there can be issues with some MTAs dealing with the VERPed envelope sender.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan