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infra(mail): remove 18 dormant snowshoe IPs from postfix + host

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Consolidate the outbound mail footprint to match the SPF intent (already
trimmed to .94/.107 on 2026-06-19). A 20-IP sending footprint reads as
snowshoe spam to receivers and was contributing to domain-reputation
throttling (Microsoft 451 4.7.500, Gmail low-reputation).

Removed from /etc/postfix/master.cf: transports yahooslow, out02-04,
out06-20, rehab02-04, HC submission ports 2527/2528, hcout2/hcout3.
Removed from /etc/network/interfaces (+ live ip addr del): host bindings
.90-.93, .95-.106, .108-.109. Kept: .94 (trucking/out05), .107 (HC/hcout1),
.71/.72 (infra).

Verified live: postfix check OK, both streams still status=sent post-change,
SSH session on .71 unaffected, transport_maps still routes via out05.

Snapshots: infra/postfix/live-snapshots/master.cf, infra/network/interfaces.
Live backups on server: /root/{master.cf,interfaces}.bak_snowshoe_*.
This commit is contained in:
justin 2026-06-23 23:45:41 -05:00
parent 14357a0223
commit 9dd6f53eb2
3 changed files with 235 additions and 3 deletions
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28
infra/network/interfaces Normal file
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# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
allow-hotplug ens18
iface ens18 inet static
address 207.174.124.71/23
address 207.174.124.72/23
# Mail sending IPs (consolidated 2026-06-23 to remove snowshoe footprint):
# .94 = mta05 -> trucking stream (out05)
# .107 = hcmta01 -> healthcare HOT stream (hcout1)
# The dormant rotation pool (.90-.93, .95-.106, .108-.109 / mta01-20,
# hcmta02-03) was removed: a 20-IP footprint reads as snowshoe spam and
# hurt domain reputation. To re-expand later, re-add the address lines
# here + the postfix transports (master.cf) + BOTH SPF records, SLOWLY
# (one IP at a time, days apart, only after Postmaster Tools shows green).
address 207.174.124.94/23
address 207.174.124.107/23
gateway 207.174.124.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 8.8.8.8 8.8.4.4
dns-search performancewest.net

194
infra/postfix/live-snapshots/master.cf Normal file
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#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master" or
# on-line: https://www.postfix.org/master.5.html).
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (no) (never) (100)
# ==========================================================================
smtp inet n - y - - smtpd
#smtp inet n - y - 1 postscreen
#smtpd pass - - y - - smtpd
#dnsblog unix - - y - 0 dnsblog
#tlsproxy unix - - y - 0 tlsproxy
# Choose one: enable submission for loopback clients only, or for any client.
#127.0.0.1:submission inet n - y - - smtpd
#submission inet n - y - - smtpd
# -o syslog_name=postfix/submission
# -o smtpd_forbid_unauth_pipelining=no
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_tls_auth_only=yes
# -o local_header_rewrite_clients=static:all
# -o smtpd_hide_client_session=yes
# -o smtpd_reject_unlisted_recipient=no
# Instead of specifying complex smtpd_<xxx>_restrictions here,
# specify "smtpd_<xxx>_restrictions=$mua_<xxx>_restrictions"
# here, and specify mua_<xxx>_restrictions in main.cf (where
# "<xxx>" is "client", "helo", "sender", "relay", or "recipient").
# -o smtpd_client_restrictions=
# -o smtpd_helo_restrictions=
# -o smtpd_sender_restrictions=
# -o smtpd_relay_restrictions=
# -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
# Choose one: enable submissions for loopback clients only, or for any client.
#127.0.0.1:submissions inet n - y - - smtpd
#submissions inet n - y - - smtpd
# -o syslog_name=postfix/submissions
# -o smtpd_forbid_unauth_pipelining=no
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o local_header_rewrite_clients=static:all
# -o smtpd_hide_client_session=yes
# -o smtpd_reject_unlisted_recipient=no
# Instead of specifying complex smtpd_<xxx>_restrictions here,
# specify "smtpd_<xxx>_restrictions=$mua_<xxx>_restrictions"
# here, and specify mua_<xxx>_restrictions in main.cf (where
# "<xxx>" is "client", "helo", "sender", "relay", or "recipient").
# -o smtpd_client_restrictions=
# -o smtpd_helo_restrictions=
# -o smtpd_sender_restrictions=
# -o smtpd_relay_restrictions=
# -o smtpd_recipient_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - y - - qmqpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
-o syslog_name=${multi_instance_name?{$multi_instance_name}:{postfix}}/$service_name
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
postlog unix-dgram n - n - 1 postlogd
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
#maildrop unix - n n - - pipe
# flags=DRXhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# flags=DRX user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
#
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
#uucp unix - n n - - pipe
# flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# ====================================================================
#
# Other external delivery methods.
#
#ifmail unix - n n - - pipe
# flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
#
#bsmtp unix - n n - - pipe
# flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -f $sender $nexthop $recipient
#
#scalemail-backend unix - n n - 2 pipe
# flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store
# ${nexthop} ${user} ${extension}
#
#mailman unix - n n - - pipe
# flags=FRX user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
# ${nexthop} ${user}
# Slow transport for Gmail/Microsoft/Yahoo (strict rate limiting during warmup)
slow unix - - n - 2 smtp
-o smtp_destination_rate_delay=5s
-o smtp_destination_concurrency_limit=2
# Pipe bounce notifications to Listmonk
listmonk-bounce unix - n n - - pipe
flags=FDq user=nobody argv=/usr/local/bin/listmonk-bounce-handler.sh
# === Trucking sending transport (consolidated to ONE warm IP) ===
# out05 = .94 / mta05. The multi-IP snowshoe rotation was removed
# 2026-06-23 (snowshoe footprint hurt domain reputation). To re-expand
# later, re-add transports here + host IPs + SPF, SLOWLY.
out05 unix - - n - - smtp
-o smtp_bind_address=207.174.124.94
-o smtp_helo_name=mta05.performancewest.net
-o syslog_name=postfix/out05
-o smtp_destination_concurrency_limit=2
-o smtp_destination_rate_delay=2s
-o smtp_destination_recipient_limit=2
# === Healthcare HOT stream ===
# Consolidated to ONE warm IP 2026-06-23: port 2526 -> hcout1 (.107).
# Ports 2527/2528 + hcout2/hcout3 (.108/.109) removed (snowshoe). The
# content_filter forces 2526 onto hcout1, overriding the global trucking
# transport_maps so hc mail never uses the trucking IP.
2526 inet n - y - - smtpd
-o syslog_name=postfix/hcsubmit107
-o smtpd_client_restrictions=permit_mynetworks,reject
-o smtpd_recipient_restrictions=permit_mynetworks,reject_unauth_destination
-o smtpd_helo_required=no
-o content_filter=hcout1:
hcout1 unix - - y - - smtp
-o smtp_bind_address=207.174.124.107
-o smtp_helo_name=hcmta01.performancewest.net
-o syslog_name=postfix/hcout1
-o smtp_destination_concurrency_limit=10
-o smtp_destination_rate_delay=0s
-o smtp_destination_recipient_limit=20
sinktest unix - - n - - smtp
-o smtp_send_xforward_command=no