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groups.io rejected your message to the following email addresses:

[email protected] ([email protected])
Your message couldn't be delivered. The error returned by the email server outside Office 365 suggests that the Internet's directory listing for the recipient's email domain (the text after the "@" symbol in the recipient's email address) doesn't exist or isn't set up correctly. A distinct and correct listing for the recipient's domain must exist to determine where to send the message. This can only be fixed by the recipient's email admin. To fix the problem, contact the recipient by some other means (by phone, for example) and give them the error message below to give to their email admin to fix.

For Email Admins
When Office 365 tried to send the message outside of Office 365 the external email server returned the error below. This error was reported by an email server outside Office 365 and it indicates that the Domain Name System (DNS) mail exchanger (MX) record or A record for the recipient's domain doesn't exist or isn't set up correctly. To fix this contact the recipient's email admin and ask them to work with their domain registrar (or Web host provider) to properly set up a correct MX and A record for their domain.

Only the recipient's email admin can fix this. Unfortunately, Office 365 support won't be able to help with these kinds of externally reported errors.

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groups.io gave this error:
Remote server returned invalid or missing DNS MX or A record for recipient domain -> 500 Invalid request, no reverse DNS for 40.92.19.97

Diagnostic information for administrators:

Generating server: CO1NAM03HT041.mail.protection.outlook.com

[email protected]
groups.io
Remote Server returned '550 5.4.350 Remote server returned invalid or missing DNS MX or A record for recipient domain -> 500 Invalid request, no reverse DNS for 40.92.19.97'

Original message headers:

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 ([fe80::109d:26e4:a72c:e0ab%4]) with mapi id 15.20.2474.018; Thu, 21 Nov 2019

 20:43:23 +0000

From: Linda Jones <lindacjones@...>

To: "[email protected]" <[email protected]>

Subject: RE: [spcomm] GO Broome Overdevelopment

Thread-Topic: [spcomm] GO Broome Overdevelopment

Thread-Index: AQHVoKgD1ZE+4KgXp0ypt4hbaTo0PKeWEeAAgAAB7ICAAAMMgIAAAAKQ

Date: Thu, 21 Nov 2019 20:43:23 +0000

Message-ID: <DM6PR11MB3593A08BD58B520BE00255D1AC4E0@...>

References: <CALFBnyNBbzTSVKCpTdFR_co5tqBPgTp2DH=ksjCP=K_QZSBy2Q@...>

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