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- Delivery restriction check failed because the sender was not . . .
Typically, this error message means that the distribution group has restricted the sender's emails
- Undeliverable notices for Microsoft Teams O365 Groups | Microsoft . . .
Status code: 550 5 7 193 The Office 365 group, RvB@jciaalst be, is configured to reject messages sent to it from outside its organization -- unless the sender is a guest group member jeroen huylebroeck@jciaalst be isn't part of the organization, and it isn't a guest group member
- Group Won’t Accept Mail From ‘Outside’ | PeteNetLive
Exchange has been this way for a long time here’s me explaining this very problem with older versions of Exchange If you create a ‘Group’, be that a Distribution Group, or a ‘Microsoft 365’ Group, the default setting is to NOT ALLOW mail from anyone outside your organisation
- Delivery failed because the sender isnt a group member error . . . - Front
This error is received because the distribution group you are emailing might not allow certain individuals to send email to the group We recommend contacting the recipient's IT team to ensure that the intended individuals can send messages to that distribution group
- Get non delivery message saying user cannot send to group, but user IS . . .
Based on your description, please first kindly refer to this official document to check the result NDR 550 5 7 193 when external users send email to Microsoft 365 group - Exchange | Microsoft Learn
- Emails sent to mailbox of Teams groups are rejected - Reddit
Emails sent to mailbox of Teams groups are rejected with the message "Delivery failed because the sender isn't a group member or external senders aren't permitted to send to this group "
- NDR 550 5. 7. 193 when external users send email to a Microsoft 365 group
Provides a resolution for an issue in which external senders receive NDR 550 5 7 193 when they send an email message to a Microsoft 365 group
- O365 Exchange 2016 Hybrid - Microsoft 365 group cannot receive external . . .
We have an Exchange 2016 and O365 hybrid environment We have several converted Microsoft 365 groups that cannot receive external e-mails, even though “Let people outside the organization send email to the group” is checked
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