Hi, not sure if this helps but, these are the networks that my postfix server is setup to send email to O365 so users get their mail delivered
# Microsoft Networks 23.103.132.0/22 23.103.136.0/21 23.103.144.0/20 23.103.198.0/23 23.103.200.0/22 23.103.212.0/22 40.92.0.0/14 40.107.0.0/17 40.107.128.0/18 52.100.0.0/14 65.55.88.0/24 65.55.169.0/24 94.245.120.64/26 104.47.0.0/17 157.55.234.0/24 157.56.110.0/23 157.56.112.0/24 207.46.100.0/24 207.46.163.0/24 213.199.154.0/24 213.199.180.128/26 216.32.180.0/23 You may need to lock things down more than me but this is the list that works for me. -ANGELO FAZZINA ang...@uconn.edu University of Connecticut, ITS, SSG, Server Systems 860-486-9075 -----Original Message----- From: owner-postfix-us...@postfix.org <owner-postfix-us...@postfix.org> On Behalf Of Stuart Henderson Sent: Wednesday, October 2, 2019 11:04 AM To: postfix-users@postfix.org Subject: Re: outbound.protection.outlook.com On 2019/10/02 16:13, Henrik K wrote: > On Wed, Oct 02, 2019 at 02:50:23PM +0200, ratatouille wrote: > > Henrik K <h...@hege.li> schrieb am 02.10.19 um 15:46:18 Uhr: > > > > > On Wed, Oct 02, 2019 at 02:20:48PM +0200, Matus UHLAR - fantomas wrote: > > > > > > > > I got rid of it, since of too many false positives related to outlook, > > > > gmail > > > > etc. > > > > > > Why would you greylist something that's easily skipped using DNSWL etc? > > > > Thank you! I'll look for that stuff. > > Just use permit_dnswl_client before your postgrey > > permit_dnswl_client list.dnswl.org > check_policy_service inet:127.0.0.1:12345 > > These should be pretty much last lines in your checks, remember that is > accepts the message at that stage when listed. > > Of course you can also create manual whitelist lookup tables. > dnswl doesn't have a good list of Microsoft servers, less than half of their deliveries to me today came from servers listed on dnswl. I make my own list from their SPF records to exempt them from greylist-type checks. Examples of some currently used that aren't on dnswl: 104.47.0.33 104.47.4.33 104.47.9.33 104.47.9.36 104.47.12.33 104.47.13.33 104.47.46.33 104.47.58.33 104.47.125.33 104.47.126.33
