Mailman-Users:
I am using Mailman 2.1.1 I have several lists and my setting for
SMTP_MAX_RCPTS = 500. If I have a list with 4000 addresses will this
setting segment the message into 8 messages with 500 recipients per
message? This SMTP_MAX_RCPTS = 500 was the default setting when I installed
Check out the archives for reams of discussions on this setting.
Basically it lets mailman drop off a bunch of mail all destined for the
same domain in one email. If 500 of your list members are all with
AOL.com then Mailman will put all 500 addresses into one email and dump
it out to your MTA.