Mailman tips & hacks

master.cf

127.0.0.1:10025 inet    n       -       y       -       -       smtpd
        -o local_recipient_maps=
        -o relay_recipient_maps=
        -o content_filter=
        -o smtpd_delay_reject=no
        -o smtpd_client_restrictions=permit_mynetworks,reject
        -o smtpd_helo_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o smtpd_data_restrictions=reject_unauth_pipelining
        -o smtpd_end_of_data_restrictions=
        -o smtpd_restriction_classes=
        -o mynetworks=127.0.0.0/8
        -o smtpd_error_sleep_time=0
        -o smtpd_soft_error_limit=1001
        -o smtpd_hard_error_limit=1000
        -o smtpd_client_connection_count_limit=0
        -o smtpd_client_connection_rate_limit=0
        -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_milters
        -o local_header_rewrite_clients=

main.cf

# Mailman / Postfix tunnnig
qmgr_message_active_limit = 40000
qmgr_message_recipient_limit = 40000
default_destination_concurrency_limit=50
default_destination_recipient_limit=50
default_process_limit=150
smtp_mx_session_limit=100
smtpd_client_connection_count_limit=100
smtp_destination_concurrency_limit=100
maximal_backoff_time = 1000s
minimal_backoff_time = 300s

mailman (mm_cfg.py)

MTA = "None"
QRUNNER_LOCK_LIFETIME = hours(10)
QRUNNER_PROCESS_LIFETIME = minutes(15)
QRUNNER_MAX_MESSAGES = 500

SMTP_MAX_RCPTS = 10
SMTP_MAX_SESSIONS_PER_CONNECTION = 0

SMTPHOST = 'localhost'
SMTPPORT = 10025

Mailman settings if you're having problems with memory .. turn off bounces / redirect bounce aliase to /dev/null.