There is nothing broken about it, any large-scale sending environment has pools of IP addresses for deliveries, and when a message comes out of the delayed queue it is typically loaded back into the pool, where it is randomly assigned to an IP for its delivery attempt.
The only time you should be seeing the same IP from a large-scale sending environment is if the tenant is using a single dedicated IP. If that tenant has multiple dedicated IPs, they will likely be used in a pool again. And biggest spam provider? The reason most global statistics are done on a per-capita basis is because otherwise a large country like China would be the top in every category. What matters is what percentage of the population is in a certain demographic, so of course Microsoft has a non-trivial amount of malicious messages, they send an extremely large amount of mail. The more important question is what percentage of it is spam, and what they are doing about it. Microsoft isn't some deceptive organization with a target market of spammers, it's a collection of people acting in good faith and doing their best to deal with a significant challenge, show a little empathy rather than treat them like the spam reaching your network is some kind of malicious plot. Mike -----Original Message----- From: mailop <mailop-boun...@mailop.org> On Behalf Of Klaus Ethgen via mailop Sent: Tuesday, June 20, 2023 2:45 AM To: mailop@mailop.org Subject: Re: [mailop] [EXTERNAL] Re: Strange mail delivery from microsoft Am Mo den 19. Jun 2023 um 21:55 schrieb Michael Wise via mailop: > If you're using GreyListing, know that a given email will not be coming from > the same IP address twice. > > The outgoing IP address is randomized for ... reasons. I substitute "no". That is absolutely ignorant to tell the people that you do mail in a broken way and tell them it is for a reason, you don't want to tell. On the same time being one of the biggest spam provider. Gruß Klaus -- Klaus Ethgen http://www.ethgen.ch/ pub 4096R/4E20AF1C 2011-05-16 Klaus Ethgen <kl...@ethgen.ch> Fingerprint: 85D4 CA42 952C 949B 1753 62B3 79D0 B06F 4E20 AF1C _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
