On 2023-06-19 at 07:01 +0100, Klaus Ethgen wrote: > Am Mo den 19. Jun 2023 um 6:33 schrieb Hans-Martin Mosner: > > I'm inclined to repeat what I said before: If your setup breaks > > mail consistently, it's likely your setup that's to blame. Others > > seem to be able > > to receive Outlook mail just fine. Microsoft didn't ask you to > > implement an arbitrary connection rate limit, > > Well, they do some kind. They host attacking hosts.
As mentioned before, I don't think they are using for hosting third- party servers. They may host mailboxes for malicious customers, though. I blame them by using a big amount of IPs to deliver mails even for > the same mail and for giving a host for malicious hosts that try to > get spam out. I blame them also for doing connections that are > absolute not needed and a wast of bandwidth. Microsoft spreading their connection attempts through a large amount of IP addresses seems precisely suited for someone limiting the number of connections/mails by IP, as you are doing. > Moreover, the mail server is a low trafic server so 10/hour should be > ok for the most delivery systems. I get 2-4 mails from 40.92.* **per day** From spam mailboxes, though. Interestingly, I don't see those in the msbl Regards _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
