diff --git a/postgrey_whitelist_clients b/postgrey_whitelist_clients
index aa3e2dc..b6ad48a 100644
--- a/postgrey_whitelist_clients
+++ b/postgrey_whitelist_clients
@@ -5,117 +5,21 @@
 #
 # postgrey version: ##VERSION##, build date: ##DATE##
 
-# greylisting.org: Southwest Airlines (unique sender, no retry)
-southwest.com
-# greylisting.org: isp.belgacom.be (wierd retry pattern)
-isp.belgacom.be
-# greylisting.org: Ameritrade (no retry)
-ameritradeinfo.com
-# greylisting.org: Amazon.com (unique sender with letters)
-amazon.com
-# 2004-05-20: Linux kernel mailing-list (unique sender with letters)
-vger.kernel.org
-# 2004-06-02: karger.ch, no retry
-karger.ch
-# 2004-06-02: lilys.ch, (slow: 4 hours)
-server-x001.hostpoint.ch
-# 2004-06-09: roche.com (no retry)
-gw.bas.roche.com
-# 2004-06-09: newsletter (no retry)
-mail.hhlaw.com
-# 2004-06-09: no retry (reported by Ralph Hildebrandt)
-prd051.appliedbiosystems.com
-# 2004-06-17: swissre.com (no retry)
-swissre.com
-# 2004-06-17: dowjones.com newsletter (unique sender with letters)
-returns.dowjones.com
-# 2004-06-18: switch.ch (works but personnel is confused by the error)
-domin.switch.ch
-# 2004-06-23: accor-hotels.com (slow: 6 hours)
-accor-hotels.com
-# 2004-06-29: rr.com (no retry, reported by Duncan Hill)
-/^ms-smtp.*\.rr\.com$/
-# 2004-06-29: cox.net (no retry, reported by Duncan Hill)
-/^lake.*mta.*\.cox\.net$/
-# 2004-06-29: motorola.com (no retry)
-mot.com
-# 2004-07-01: nic.fr (address verification, reported by Arnaud Launay)
-nic.fr
-# 2004-07-01: verizon.net (address verification, reported by Bill Moran and Eric, adapted by Adam C. Mathews)
-/^s[cv]\d+pub\.verizon\.net$/
-# 2004-07-02: cs.columbia.edu (no retry)
-cs.columbia.edu
+# 2018-01-16: Microsoft Exchange Online - German Pool (large pool, reported by Alexander Wilms)
+51.4.72.0/24
+51.5.72.0/24
+51.4.80.0/27
+51.5.80.0/27
 # 2004-07-02: papersinvited.com (no retry)
 66.216.126.174
-# 2004-07-02: telekom.de (slow: 6 hours)
-/^mail(out)?\d+\.telekom\.de$/
-# 2004-07-04: tiscali.dk (slow: 12 hours, reported by Klaus Alexander Seistrup)
-/^smtp\d+\.tiscali\.dk$/
-# 2004-07-04: freshmeat.net (address verification)
-freshmeat.net
-# 2004-07-11: zd-swx.com (unique sender with letters, reported by Bill Landry)
-zd-swx.com
-# 2004-07-11: lockergnome.wc09.net (unique sender with letters, reported by Bill Landry)
-lockergnome.wc09.net
-# 2004-07-19: mxlogic.net (no retry, reported by Eric)
-p01m168.mxlogic.net
-p02m169.mxlogic.net
-# 2004-09-08: intel.com (pool on different subnets) 
-/^fmr\d+\.intel\.com$/
-# 2004-09-17: cox-internet.com (no retry, reported by Rod Roark)
-/^fe\d+\.cox-internet\.com$/
-# 2004-10-11: logismata.ch (no retry)
-logismata.ch
-# 2004-11-25: brief.cw.reum.de (no retry, reported by Manuel Oetiker)
-brief.cw.reum.de
-# 2004-12-03: ingeno.ch (no retry)
-qmail.ingeno.ch
-# 2004-12-06: rein.ch (no retry)
-mail1.thurweb.ch
-# 2005-01-26: tu-ilmenau.de (no retry)
-piggy.rz.tu-ilmenau.de
-# 2005-04-06: polymed.ch (no retry)
-mail.polymed.ch
-# 2005-06-08: hu-berlin.de (slow: 6 hours, reported by Joachim Schoenberg)
-rz.hu-berlin.de
-# 2005-06-17: gmail.com (big pool, reported by Beat Mueller)
-proxy.gmail.com
-# 2005-06-23: cacert.org (address verification, reported by Martin Lohmeier)
-cacert.org
-# 2005-07-27: polytech.univ-mrs.fr (no retry, reported by Giovanni Mandorino)
-polytech.univ-mrs.fr
-# 2005-08-05: gnu.org (address verification, reported by Martin Lohmeier)
-gnu.org
-# 2005-08-17: ciphirelabs.com (needs fast responses, reported by Sven Mueller)
-cs.ciphire.net
-# 2005-11-11: lufthansa (no retry, reported by Peter Bieringer)
-/^gateway\d+\.np4\.de$/
-# 2005-11-23: arcor-online.net (slow: 12 hours, reported by Bernd Zeimetz)
-/^mail-in-\d+\.arcor-online\.net$/
-# 2005-12-29: netsolmail.com (no retry, reported by Gareth Greenaway)
-netsolmail.com
-# mail.likopris.si (no retry, reported by Vito Robar)
-193.77.153.67
-# jcsw.nato.int (several servers, no retry, reported by Vito Robar)
-195.235.39
-# tesla.vtszg.hr (no retry, reported by Vito Robar)
-tesla.vtszg.hr
-# mailgw*.iai.co.il (pool of several servers, reported by Vito Robar)
-/^mailgw.*\.iai\.co\.il$/
-# gw.stud-serv-mb.si (no retry, reported by Vito Robar)
-gw.stud-serv-mb.si
-# mail.commandtech.com (no retry, reported by Vito Robar)
-216.238.112.99
-# duropack.co.at (no retry, reported by Vito Robar)
-193.81.20.195
-# mail.esimit-tech.si (no retry, reported by Vito Robar)
-193.77.126.208
 # mail.resotel.be (ocasionally no retry, reported by Vito Robar)
 80.200.249.216
-# mail2.alliancefr.be (ocasionally no retry, reported by Vito Robar)
-mail2.alliancefr.be
-# webserver.turboinstitut.si (no retry, reported by Vito Robar)
-webserver.turboinstitut.si
+# 2018-09-23: Mailchimp (large pool)
+148.105.0.0/16
+# mail.esimit-tech.si (no retry, reported by Vito Robar)
+193.77.126.208
+# mail.likopris.si (no retry, reported by Vito Robar)
+193.77.153.67
 # mil.be (pool of different servers, reported by Vito Robar)
 193.191.218.141
 193.191.218.142
@@ -123,188 +27,306 @@ webserver.turboinstitut.si
 194.7.234.141
 194.7.234.142
 194.7.234.143
-# mail*.usafisnews.org (no retry, reported by Vito Robar)
-/^mail\d+\.usafisnews\.org$/
-# odk.fdv.uni-lj.si (no retry, reported by Vito Robar)
-/^odk.fdv.uni-lj.si$/
-# rak-gentoo-1.nameserver.de (no retry, reported by Vito Robar)
-rak-gentoo-1.nameserver.de
-# dars.si (ocasionally no retry, reported by Vito Robar)
-mx.dars.si
+# duropack.co.at (no retry, reported by Vito Robar)
+193.81.20.195
+# jcsw.nato.int (several servers, no retry, reported by Vito Robar)
+195.235.39
+# 2018-09-23: Mailchimp (large pool)
+198.2.128.0/18
+# 2018-09-23: Mailchimp (large pool)
+205.201.128.0/20
+# 2017-01-06: biglumber.com, sends verification email and doesn't retry
+206.222.31.58
 # cosis.si (no retry, reported by Vito Robar)
 213.143.66.210
-# mta?.siol.net (sometimes no or slow retry; they use intermail, reported by Vito Robar)
-/^mta[12].siol.net$/
-# pim-N-N.quickinspirationsmail.com (unique sender, reported by Vito Robar)
-/^pim-\d+-\d+\.quickinspirationsmail\.com$/
-# flymonarch (no retry, reported by Marko Djukic)
-flymonarch.com
-# wxs.nl (no retry, reported by Johannes Fehr)
-/^p?smtp.*\.wxs\.nl$/
-# ibm.com (big pool, reported by Casey Peel)
-ibm.com
-# messagelabs.com (big pool, reported by John Tobin)
-messagelabs.com
+# mail.commandtech.com (no retry, reported by Vito Robar)
+216.238.112.99
+# 2018-01-16: Microsoft Exchange Online - German Pool (large pool, reported by Alexander Wilms)
+2a01:4180:4051:0800::/64
+2a01:4180:4050:0800::/64
+2a01:4180:4051:0400::/64
+2a01:4180:4050:0400::/64
+
+# 2004-06-23: accor-hotels.com (slow: 6 hours)
+accor-hotels.com
+airbnb.com
+# greylisting.org: Amazon.com (unique sender with letters)
+amazon.com
+# 2016-09-13: amazonses.com (github #35, #37, #38)
+amazonses.com
+# greylisting.org: Ameritrade (no retry)
+ameritradeinfo.com
+# 2022-01-22: barracuda.com (large pool, #90)
+barracuda.com
+# 2017-01-11: battle.net (long retry, #44)
+battle.net
 # ptb.de (slow, reported by Joachim Schoenberg)
 berlin.ptb.de
-# registrarmail.net (unique sender names, reported by Simon Waters)
-registrarmail.net
-# google.com (big pool, reported by Matthias Dyer, Martin Toft)
-google.com
-# orange.fr (big pool, reported by Loïc Le Loarer)
-/^smtp\d+\.orange\.fr$/
-# citigroup.com (slow retry, reported by Michael Monnerie)
-/^smtp\d+.citigroup.com$/
-# cruisingclub.ch (no retry)
-mail.ccs-cruising.ch
+# 2010-06-10: Microsoft servers (long/no retry, reported by Roy McMorran)
+bigfish.com
+booking.com
+# 2004-11-25: brief.cw.reum.de (no retry, reported by Manuel Oetiker)
+brief.cw.reum.de
+# 2005-06-23: cacert.org (address verification, reported by Martin Lohmeier)
+cacert.org
+calendly.com
+# 2024-02-04: large pool
+cloudflare.net
+# 2005-08-17: ciphirelabs.com (needs fast responses, reported by Sven Mueller)
+cs.ciphire.net
+# 2004-07-02: cs.columbia.edu (no retry)
+cs.columbia.edu
+delta-system.net
+# French tax authority, no retry
+dgfip.finances.gouv.fr
+# 2023-07-14: dhosting.com (large pool)
+dhosting.com
 # digg.com (no retry, Debian #406774)
 diggstage01.digg.com
-# liberal.ca (retries only during 270 seconds, Debian #406774)
-smtp.liberal.ca
-# pi.ws (pool + long retry, Debian #409851)
-/^mail[12]\.pi\.ws$/
-# rambler.ru (big pool, reported by Michael Monnerie)
-rambler.ru
-# free.fr (big pool, reported by Denis Sacchet)
-/^(?:smtp\w*|postfix)[0-9]+-g[0-9]+\.free\.fr$/
-# thehartford.com (pool + long retry, reported by Jacob Leifman)
-/^netmail\d+\.thehartford\.com$/
-# abb.com (only one retry, reported by Roman Plessl)
-/^nse\d+\.abb\.com$/
-# 2007-07-27: sourceforge.net (sender verification)
-lists.sourceforge.net
-# 2007-08-06: polytec.de (no retry, reported by Patrick McLean)
-polytec.de
-# 2007-09-06: qualiflow.com (no retry, reported by Alex Beckert)
-/^mail\d+\.msg\.oleane\.net$/
-# 2007-09-07: nrl.navy.mil (no retry, reported by Axel Beckert)
-nrl.navy.mil
-# 2007-10-18: aliplast.com (long retry, reported by Johannes Feigl)
-mail.aliplast.com
-# 2007-10-18: inode.at (long retry, reported by Johannes Feigl)
-/^mx\d+\..*\.inode\.at$/
-# 2008-02-01: bol.com (no retry, reported by Frank Breedijk)
-/^.*?.server.arvato-systems.de$/
-# 2008-06-05: registeredsite.com (no retry, reported by Fred Kilbourn)
-/^(?:mail|fallback-mx)\d+.atl.registeredsite.com$/
-# 2008-07-17: mahidol.ac.th (no retry, reported by Alex Beckert)
-saturn.mahidol.ac.th
+# 2004-06-18: switch.ch (works but personnel is confused by the error)
+domin.switch.ch
 # 2008-07-18: ebay.com (big pool, reported by Peter Samuelson)
 ebay.com
-# 2008-07-22: yahoo.com (big pool, reported by Juan Alonso)
-yahoo.com
-# 2008-11-07: facebook (no retry, reported by Tim Freeman)
-/^outmail\d+\.sctm\.tfbnw\.net$/
-# 2016-09-13: facebook (updated names, github #30)
-outmail.facebook.com
-# 2017-02-03: facebook (other names, reported by Harald Paulsen)
-outappmail.facebook.com
+etsy.com
+# 2014-12-18: mail.ru (retries from fallback*.mail.ru, reported by Andriy Yurchuk)
+/^fallback\d+\.mail\.ru$/
+/^fallback\d+\.m\.smailru\.net$/
+# 2004-09-17: cox-internet.com (no retry, reported by Rod Roark)
+/^fe\d+\.cox-internet\.com$/
+fedex.com
+# flymonarch (no retry, reported by Marko Djukic)
+flymonarch.com
+# 2004-09-08: intel.com (pool on different subnets)
+/^fmr\d+\.intel\.com$/
+# 2010-06-10: Microsoft servers (long/no retry, reported by Roy McMorran)
+frontbridge.com
+# 2004-07-04: freshmeat.net (address verification)
+freshmeat.net
+# 2005-11-11: lufthansa (no retry, reported by Peter Bieringer)
+/^gateway\d+\.np4\.de$/
+# 2016-11-01: gem.godaddy.com (github #39)
+gem.godaddy.com
+# 2016-11-16: github long retry (github #41)
+github.com
+github.net
+# 2005-08-05: gnu.org (address verification, reported by Martin Lohmeier)
+gnu.org
+# google.com (big pool, reported by Matthias Dyer, Martin Toft)
+google.com
+# gw.stud-serv-mb.si (no retry, reported by Vito Robar)
+gw.stud-serv-mb.si
+# 2010-01-08: tifr.res.in (no retry, reported by Alex Beckert)
+home.theory.tifr.res.in
+# ibm.com (big pool, reported by Casey Peel)
+ibm.com
+# greylisting.org: isp.belgacom.be (wierd retry pattern)
+isp.belgacom.be
+# 2004-06-02: karger.ch, no retry
+karger.ch
+# 2004-06-29: cox.net (no retry, reported by Duncan Hill)
+/^lake.*mta.*\.cox\.net$/
+linkedin.com
+# 2007-07-27: sourceforge.net (sender verification)
+lists.sourceforge.net
+# 2004-07-11: lockergnome.wc09.net (unique sender with letters, reported by Bill Landry)
+lockergnome.wc09.net
+# 2004-10-11: logismata.ch (no retry)
+logismata.ch
+# 2015-08-19 (big pool)
+mail.alibaba.com
+# 2007-10-18: aliplast.com (long retry, reported by Johannes Feigl)
+mail.aliplast.com
+# 2015-08-19 (big pool)
+mail.aliyun.com
+# cruisingclub.ch (no retry)
+mail.ccs-cruising.ch
+# 2022-01-22: infomaniak.ch (large pool, #88)
+mail.infomaniak.ch
+# 2004-06-09: newsletter (no retry)
+mail.hhlaw.com
 # 2018-01-12: facebook (other names, reported by Pascal Herbert)
 mail-mail.facebook.com
-# 2009-02-10: server14.cyon.ch (long retry, reported by Alex Beckert)
-server14.cyon.ch
+# 2017-05-18: ovh.net (large pool, repoted by Tobias Hannaske)
+mail-out.ovh.net
+# 2005-04-06: polymed.ch (no retry)
+mail.polymed.ch
+# 2004-12-06: rein.ch (no retry)
+mail1.thurweb.ch
+# mail2.alliancefr.be (ocasionally no retry, reported by Vito Robar)
+mail2.alliancefr.be
+# 2022-01-22: mailgun.net (large pool, #87)
+mailgun.com
+mailgun.net
+mailgun.us
+mailhop.org
+# 2022-01-22: mailspamprotection.com (large pool, #82)
+mailspamprotection.com
+# 2008-06-05: registeredsite.com (no retry, reported by Fred Kilbourn)
+/^(?:mail|fallback-mx)\d+.atl.registeredsite.com$/
+# pi.ws (pool + long retry, Debian #409851)
+/^mail[12]\.pi\.ws$/
+# 2005-11-23: arcor-online.net (slow: 12 hours, reported by Bernd Zeimetz)
+/^mail-in-\d+\.arcor-online\.net$/
+# 2004-07-02: telekom.de (slow: 6 hours)
+/^mail(out)?\d+\.telekom\.de$/
+# mail*.usafisnews.org (no retry, reported by Vito Robar)
+/^mail\d+\.usafisnews\.org$/
+# 2007-09-06: qualiflow.com (no retry, reported by Alex Beckert)
+/^mail\d+\.msg\.oleane\.net$/
+# mailgw*.iai.co.il (pool of several servers, reported by Vito Robar)
+/^mailgw.*\.iai\.co\.il$/
 # 2009-08-19: 126.com (big pool)
 /^m\d+-\d+\.126\.com$/
-# 2010-01-08: tifr.res.in (no retry, reported by Alex Beckert)
-home.theory.tifr.res.in
-# 2010-01-08: 1blu.de (long retry, reported by Alex Beckert)
-ms4-1.1blu.de
-# 2010-03-17: chello.at (big pool, reported by Jan-willem van Eys)
-/^viefep\d+-int\.chello\.at$/
-# 2010-05-31: nic.nu (long retry, reported by Ivan Sie)
-mx.nic.nu
+me.com
+# messagelabs.com (big pool, reported by John Tobin)
+messagelabs.com
 # 2010-06-10: Microsoft servers (long/no retry, reported by Roy McMorran)
-bigfish.com
-frontbridge.com
 microsoft.com
-# 2010-06-18: Google/Postini (big pool, reported by Warren Trakman)
-postini.com
-# 2011-02-04: evanzo-server.de (no retry, reported by Andre Hoepner)
-/^mx.*\.evanzo-server\.de$/
-# 2011-05-02: upcmail.net (big pool, reported by Michael Monnerie)
-upcmail.net
-# 2013-12-18: orange.fr (big pool, reported by fulax)
-/^smtp\d+\.smtpout\.orange\.fr$/
+mimecast.com
+# 2004-06-29: motorola.com (no retry)
+mot.com
 # 2014-01-29: gmx/web.de/1&1 (long retry, reported by Axel Beckert)
 mout-xforward.gmx.net
-mout-xforward.web.de
 mout-xforward.kundenserver.de
 mout-xforward.perfora.net
-# 2014-12-18: mail.ru (retries from fallback*.mail.ru, reported by Andriy Yurchuk)
-/^fallback\d+\.mail\.ru$/
-/^fallback\d+\.m\.smailru\.net$/
-# French tax authority, no retry
-dgfip.finances.gouv.fr 
+mout-xforward.web.de
+# 2010-01-08: 1blu.de (long retry, reported by Alex Beckert)
+ms4-1.1blu.de
+# 2004-06-29: rr.com (no retry, reported by Duncan Hill)
+/^ms-smtp.*\.rr\.com$/
+# mta?.siol.net (sometimes no or slow retry; they use intermail, reported by Vito Robar)
+/^mta[12].siol.net$/
+# 2016-05-05: mtasv.net (no retry, reported by @chriscowley)
+mtasv.net
+# dars.si (ocasionally no retry, reported by Vito Robar)
+mx.dars.si
+# 2010-05-31: nic.nu (long retry, reported by Ivan Sie)
+mx.nic.nu
+# 2007-10-18: inode.at (long retry, reported by Johannes Feigl)
+/^mx\d+\..*\.inode\.at$/
+# 2011-02-04: evanzo-server.de (no retry, reported by Andre Hoepner)
+/^mx.*\.evanzo-server\.de$/
+# thehartford.com (pool + long retry, reported by Jacob Leifman)
+/^netmail\d+\.thehartford\.com$/
+# 2005-12-29: netsolmail.com (no retry, reported by Gareth Greenaway)
+netsolmail.com
+# 2004-07-01: nic.fr (address verification, reported by Arnaud Launay)
+nic.fr
+# 2007-09-07: nrl.navy.mil (no retry, reported by Axel Beckert)
+nrl.navy.mil
+# abb.com (only one retry, reported by Roman Plessl)
+/^nse\d+\.abb\.com$/
+# odk.fdv.uni-lj.si (no retry, reported by Vito Robar)
+/^odk.fdv.uni-lj.si$/
 # 2015-06-10: magisto.com (requested by postmaster)
 /^o\d+\.ntdc\.magisto\.com$/
+# 2017-02-03: facebook (other names, reported by Harald Paulsen)
+outappmail.facebook.com
 # 2015-07-23: outlook.com (github #20)
 outlook.com
-# 2015-08-19 (big pool)
-mail.alibaba.com
-mail.aliyun.com
-# 2016-05-05: mtasv.net (no retry, reported by @chriscowley)
-mtasv.net
-# 2016-09-13: amazonses.com (github #35, #37, #38)
-amazonses.com
-# 2016-09-13: startcom.org (github #7)
-startcom.org
-# 2016-11-01: gem.godaddy.com (github #39)
-gem.godaddy.com
-# 2016-11-16: github long retry (github #41)
-github.com
-github.net
-# 2017-01-06: biglumber.com, sends verification email and doesn't retry
-206.222.31.58
-# 2017-01-11: battle.net (long retry, #44)
-battle.net
-# 2017-02-09: twitter.com (big pool, #46)
-twitter.com
-# 2017-05-02: rrze.uni-erlangen.de (University Erlangen-Nuremberg (fau.de) uses different IPv4 and IPv6 addresses for their Mailserver)
-rrze.uni-erlangen.de
-# 2017-05-18: ovh.net (large pool, repoted by Tobias Hannaske)
-mail-out.ovh.net
-# 2017-06-07: evanzo-server.de (no retry, reported by Patrick Terlisten)
-/^smarthost.*\.evanzo-server\.de$/
+# 2016-09-13: facebook (updated names, github #30)
+outmail.facebook.com
+# 2008-11-07: facebook (no retry, reported by Tim Freeman)
+/^outmail\d+\.sctm\.tfbnw\.net$/
+# wxs.nl (no retry, reported by Johannes Fehr)
+/^p?smtp.*\.wxs\.nl$/
+# 2004-07-19: mxlogic.net (no retry, reported by Eric)
+p01m168.mxlogic.net
+p02m169.mxlogic.net
+# 2005-01-26: tu-ilmenau.de (no retry)
+piggy.rz.tu-ilmenau.de
+# pim-N-N.quickinspirationsmail.com (unique sender, reported by Vito Robar)
+/^pim-\d+-\d+\.quickinspirationsmail\.com$/
+# 2007-08-06: polytec.de (no retry, reported by Patrick McLean)
+polytec.de
+# 2005-07-27: polytech.univ-mrs.fr (no retry, reported by Giovanni Mandorino)
+polytech.univ-mrs.fr
+# 2010-06-18: Google/Postini (big pool, reported by Warren Trakman)
+postini.com
+# 2004-06-09: no retry (reported by Ralph Hildebrandt)
+prd051.appliedbiosystems.com
 # 2018-01-16: Microsoft Exchange Online - German Pool (large pool, reported by Alexander Wilms)
-51.4.72.0/24
-51.5.72.0/24
-51.4.80.0/27
-51.5.80.0/27
-2a01:4180:4051:0800::/64
-2a01:4180:4050:0800::/64
-2a01:4180:4051:0400::/64
-2a01:4180:4050:0400::/64
 protection.outlook.de
-# 2018-04-25: Mailchimp test newsletter (unique sender each time)
-systemalerts.mailchimp.com
+# 2019-06-25: protonmail.ch (large pool, #76)
+protonmail.ch
+# 2005-06-17: gmail.com (big pool, reported by Beat Mueller)
+proxy.gmail.com
+# 2004-12-03: ingeno.ch (no retry)
+qmail.ingeno.ch
+# 2004-06-09: roche.com (no retry)
+gw.bas.roche.com
+# rak-gentoo-1.nameserver.de (no retry, reported by Vito Robar)
+rak-gentoo-1.nameserver.de
+# rambler.ru (big pool, reported by Michael Monnerie)
+rambler.ru
 # 2018-09-02: reflexion.net (large pool, reported by @shiz0)
 reflexion.net
-# 2018-09-23: Mailchimp (large pool)
-205.201.128.0/20
-198.2.128.0/18
-148.105.0.0/16
+# registrarmail.net (unique sender names, reported by Simon Waters)
+registrarmail.net
 # 2019-05-27: rekkiapp.com (large pool, #74)
 rekki.com
-# 2019-06-25: protonmail.ch (large pool, #76)
-protonmail.ch
-# 2022-01-22: townsuite.com (long retry)
-townsuite.com
-# 2022-01-22: mailspamprotection.com (large pool, #82)
-mailspamprotection.com
-# 2022-01-22: mailgun.net (large pool, #87)
-mailgun.com
-mailgun.net
-mailgun.us
-# 2022-01-22: infomaniak.ch (large pool, #88)
-mail.infomaniak.ch
-# 2022-01-22: barracuda.com (large pool, #90)
-barracuda.com
+# 2004-06-17: dowjones.com newsletter (unique sender with letters)
+returns.dowjones.com
+# 2017-05-02: rrze.uni-erlangen.de (University Erlangen-Nuremberg (fau.de) uses different IPv4 and IPv6 addresses for their Mailserver)
+rrze.uni-erlangen.de
+# 2005-06-08: hu-berlin.de (slow: 6 hours, reported by Joachim Schoenberg)
+rz.hu-berlin.de
+# 2008-07-17: mahidol.ac.th (no retry, reported by Alex Beckert)
+saturn.mahidol.ac.th
+# 2004-07-01: verizon.net (address verification, reported by Bill Moran and Eric, adapted by Adam C. Mathews)
+/^s[cv]\d+pub\.verizon\.net$/
+sendgrid.net
+# 2004-06-02: lilys.ch, (slow: 4 hours)
+server-x001.hostpoint.ch
+# 2009-02-10: server14.cyon.ch (long retry, reported by Alex Beckert)
+server14.cyon.ch
+# 2008-02-01: bol.com (no retry, reported by Frank Breedijk)
+/^.*?.server.arvato-systems.de$/
+shopify.com
+# 2017-06-07: evanzo-server.de (no retry, reported by Patrick Terlisten)
+/^smarthost.*\.evanzo-server\.de$/
+# liberal.ca (retries only during 270 seconds, Debian #406774)
+smtp.liberal.ca
 # 2022-01-22: smtp2go.com (large pool, #92)
 smtp2go.com
-# 2023-07-14: dhosting.com (large pool)
-dhosting.com
-# 2024-02-04: large pool
-cloudflare.net
-me.com
-mimecast.com
-sparkpostmail.com
\ No newline at end of file
+# free.fr (big pool, reported by Denis Sacchet)
+/^(?:smtp\w*|postfix)[0-9]+-g[0-9]+\.free\.fr$/
+# citigroup.com (slow retry, reported by Michael Monnerie)
+/^smtp\d+.citigroup.com$/
+# orange.fr (big pool, reported by Loïc Le Loarer)
+/^smtp\d+\.orange\.fr$/
+# 2013-12-18: orange.fr (big pool, reported by fulax)
+/^smtp\d+\.smtpout\.orange\.fr$/
+# 2004-07-04: tiscali.dk (slow: 12 hours, reported by Klaus Alexander Seistrup)
+/^smtp\d+\.tiscali\.dk$/
+# greylisting.org: Southwest Airlines (unique sender, no retry)
+southwest.com
+sparkpostmail.com
+spotify.com
+# 2016-09-13: startcom.org (github #7)
+startcom.org
+# 2004-06-17: swissre.com (no retry)
+swissre.com
+# 2018-04-25: Mailchimp test newsletter (unique sender each time)
+systemalerts.mailchimp.com
+teamsystemdigital.com
+# tesla.vtszg.hr (no retry, reported by Vito Robar)
+tesla.vtszg.hr
+# 2022-01-22: townsuite.com (long retry)
+townsuite.com
+# 2017-02-09: twitter.com (big pool, #46)
+twitter.com
+# 2011-05-02: upcmail.net (big pool, reported by Michael Monnerie)
+upcmail.net
+# 2004-05-20: Linux kernel mailing-list (unique sender with letters)
+vger.kernel.org
+# 2010-03-17: chello.at (big pool, reported by Jan-willem van Eys)
+/^viefep\d+-int\.chello\.at$/
+# webserver.turboinstitut.si (no retry, reported by Vito Robar)
+webserver.turboinstitut.si
+wetransfer.com
+widestore.net
+# 2008-07-22: yahoo.com (big pool, reported by Juan Alonso)
+yahoo.com
+# 2004-07-11: zd-swx.com (unique sender with letters, reported by Bill Landry)
+zd-swx.com