I use zimbra which uses postfix as MTA. I have configured postfix
message rate limit to 20 mails per minute. As you may know any message
more this qouta that will be rejected by default.
but I need these messages to be deferred(delayed) in postfix queue,
instead of being rejected (it makes more sense to delay messages instead
of rejecting them).
This is my main.cf contents:
mail_owner = postfix
bounce_notice_recipient = postmaster
content_filter = smtp-amavis:[127.0.0.1]:10024
relayhost =
smtpd_sasl_authenticated_header = no
broken_sasl_auth_clients = yes
minimal_backoff_time = 300s
sender_canonical_maps = proxy:ldap:/opt/zimbra/conf/ldap-scm.cf
always_add_missing_headers = yes
smtpd_tls_key_file = /opt/zimbra/conf/smtpd.key
smtpd_helo_required = yes
virtual_transport = error
sendmail_path = /opt/zimbra/postfix/sbin/sendmail
smtpd_recipient_restrictions = check_policy_service
inet:127.0.0.1:10031, reject_non_fqdn_recipient,
permit_sasl_authenticated, permit_mynetworks,
reject_unauth_destination, reject_unlisted_recipient,
reject_invalid_hostname, reject_non_fqdn_hostname,
reject_non_fqdn_sender, reject_rbl_client b.barracudacentral.org
reject_rbl_client bl.spamcop.net reject_rbl_client
cbl.abuseat.org reject_rbl_client combined.njabl.org
reject_rbl_client dnsbl.njabl.org reject_rbl_client
dnsbl.sorbs.net reject_rbl_client relays.mail-abuse.org
reject_rbl_client zen.spamhaus.org, permit
smtpd_reject_unlisted_recipient = no
bounce_queue_lifetime = 5d
local_header_rewrite_clients =
permit_mynetworks,permit_sasl_authenticated
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_tls_security_level = may
smtpd_milters =
smtpd_sender_restrictions =
lmtp_host_lookup = native
delay_warning_time = 0h
virtual_mailbox_maps = proxy:ldap:/opt/zimbra/conf/ldap-vmm.cf
queue_run_delay = 300s
header_checks =
notify_classes = resource,software
command_directory = /opt/zimbra/postfix/sbin
smtpd_client_restrictions = reject_unauth_pipelining
smtpd_tls_auth_only = yes
virtual_alias_maps = proxy:ldap:/opt/zimbra/conf/ldap-vam.cf
mailq_path = /opt/zimbra/postfix/sbin/mailq
mynetworks = 127.0.0.0/8
lmtp_connection_cache_time_limit = 4s
transport_maps = proxy:ldap:/opt/zimbra/conf/ldap-transport.cf
virtual_alias_domains = proxy:ldap:/opt/zimbra/conf/ldap-vad.cf
smtpd_sasl_auth_enable = yes
smtpd_tls_loglevel = 1
maximal_backoff_time = 4000s
virtual_mailbox_domains =
proxy:ldap:/opt/zimbra/conf/ldap-vmd.cf
daemon_directory = /opt/zimbra/postfix/libexec
non_smtpd_milters =
setgid_group = postdrop
alias_maps = hash:/etc/aliases
mydestination = localhost
myhostname = mail0.arissystem.com
message_size_limit = 10240000
recipient_delimiter =
in_flow_delay = 1s
queue_directory = /opt/zimbra/data/postfix/spool
propagate_unmatched_extensions = canonical
manpage_directory = /opt/zimbra/postfix/man
smtpd_tls_cert_file = /opt/zimbra/conf/smtpd.crt
lmtp_connection_cache_destinations =
newaliases_path = /opt/zimbra/postfix/sbin/newaliases
policy_time_limit = 3600
smtpd_client_message_rate_limit = 20
mailbox_size_limit = 0
disable_dns_lookups = no
smtpd_end_of_data_restrictions = check_policy_service
inet:127.0.0.1:10031
I appretiate any help on the subject.
