agree Gary. There's a reason my day job moved their 280k+ employees (plus countless non-human mailboxes) from Lotus Notes to Microsoft. It's been working much, much better since the move.
On Tue, Nov 11, 2025 at 9:35 AM Gary Sparkes via NANOG < [email protected]> wrote: > Can confirm on that one, Exchange / Outlook are the ones that play > extremely well in this scenario. Microsoft learned these lessons very early > on.... One hilarious example was internal to them in 1997, for instance > (not the same type of problem, but still one of many things that they > learned well early in exchange's life). > > For all MS's faults, Exchange really is a damn good product at the end of > the day if it's set up per documentation (ie: not a single server) and you > actually use any of its functionality. It's the most set-it-and-forget-it > and self-healing system outside of normal patching I've ever had to deal > with at scale (largest of 70k users, smallest of 100 users). > > -----Original Message----- > From: Ryan Hamel via NANOG <[email protected]> > Sent: Tuesday, November 11, 2025 2:16 AM > To: [email protected] > Cc: Ryan Hamel <[email protected]> > Subject: Re: [Ext] trolling > > Endre, > > Exchange only sends one reply to each sender ( > https://learn.microsoft.com/en-us/troubleshoot/exchange/client-connectivity/one-reply-sent-sender), > and it's also configurable too ( > https://learn.microsoft.com/en-us/troubleshoot/exchange/email-delivery/understand-troubleshoot-oof-replies > ). > > Ryan Hamel > > ________________________________ > From: Endre Szabo via NANOG <[email protected]> > Sent: Monday, November 10, 2025 10:50 PM > To: [email protected] <[email protected]> > Cc: Endre Szabo <[email protected]> > Subject: Re: [Ext] trolling > > Caution: This is an external email and may be malicious. Please take care > when clicking links or opening attachments. > > > On Mon, Nov 10, 2025 at 15:14:26+0000, Giorgio Bonfiglio via NANOG wrote: > > Also, speaking about technical limitations - which mailserver in the > world does send one auto-reply PER MESSAGE to the same sender? I haven't > seen this in ages, most seem to be sending only once or at worst once every > day or so. > > Oh, I know the answer to this one! It's a niche player in the market, and > it's well known for not following standards or best practices. Like, they > could have ignored messages with List-* headers, for example, right? The > server in question is called Microsoft Exchange. > > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/BUZSGS4UJJTCCBMVNGCFM7UDKQSDQTDA/ > < > https://lists.nanog.org/archives/list/[email protected]/message/BUZSGS4UJJTCCBMVNGCFM7UDKQSDQTDA/ > > > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/BRXFVZBOV3TQZAFCV2IVOXEIXEL4DMSC/ > _______________________________________________ > NANOG mailing list > > https://lists.nanog.org/archives/list/[email protected]/message/QULMBW6OKPDS6B4TZ5OARL2W5XKPI3HF/ > _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/D4PCTACWYSLZAWZFJH6F63MJ4YJKXO7R/
