This is a very common issue we see. Best action is to notify an individual at said company and let them escalate. Many times, they will fix it and issue get resolved.
Thanks, Michael Irvine | Network Lead Great Computer Solutions O: 847-763-0763<tel:847-763-0763> | M: 224-435-6331<tel:224-435-6331> E: [email protected]<mailto:[email protected]> W: www.greatsys.com<http://www.greatsys.com> A: 5152 Main St, Skokie, IL 60077 Meet: Schedule a call with me<https://outlook.office365.com/owa/calendar/[email protected]/bookings/> [cid:storage_emulated_0__EmailTempImage_3_TempSignature_signature_image001_png_1702338525629] "Empowering Your Business Through Technology" -------- Original message -------- From: Graeme Fowler via mailop <[email protected]> Date: 2/20/24 07:27 (GMT-06:00) To: mailop <[email protected]> Subject: Re: [mailop] Office365: only accepts messages from people in its organization or on its allowed senders list CAUTION: This email originated from outside of the organization. Do not click any links or open attachments unless you recognize the sender and know the content is safe. On 20 Feb 2024, at 11:40, Andre van Eyssen via mailop <[email protected]> wrote: > The second word is the key. Pretty standard -- this is a group distribution > list that explodes to a larger set of recipients and you can't use it because > you're not on the whitelist. So whilst the distribution group configuration is deliberate (and very common in large corporate Exchange environments), there’s a basic operational mistake by the sender - they’ve either managed to do the rare trick of sending From: the DG’s email address, or they’ve set the Reply-To: header to reply to the DG. (it could also be done by an outbound transport rule, I know). As the list is restricted, that’s pretty poor business practice - “We expect you to reply to this message, but you can’t, and here’s why!” Graeme _______________________________________________ mailop mailing list [email protected] https://list.mailop.org/listinfo/mailop
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