Try this:
Also, check the properties of the distribution group. Under “delivery restrictions”, the default is to permit only if senders are within the domain.
J.E.B.
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Appx Cleanup for Windows 10/11 Performance
Clear System Volume Information (and Disable Sentinel One)
Delete and recreate NTFS USN journal for performance gains
DISM Cleans Up Windows Updates and Cache
Fix Corrupt Windows using DISM and Updated INSTALL.WIM
Release server RAID bandwidth by removing Windows Defender
Renoberate & Clear Windows Logs
Set Windows to Prefer IPv4 over IPv6 (when Microsoft v6 networking goes haywire)
To Get HPE Product Number: The HPE PartSurfer!
Use All Available CPU Power in Current Windows!
Antivirus/Antimalware Tools and Issues
Outlook & Exchange / Exchange Online
POTS lines (modems, FAX, etc.)
Remote Access, Remote Desktop, Terminal Server
Virtual Machines & Environments
Try this:
Also, check the properties of the distribution group. Under “delivery restrictions”, the default is to permit only if senders are within the domain.
J.E.B.
Categories: Email Exchange and Exchange Online