Teams meeting invites quarantined

Matthew Shaw 0 Reputation points
2024-03-11T15:46:45.8666667+00:00

Hi, we are having problems with email (Teams) invites being blocked/quarantined by external companies. I have checked our SPF, DKIM etc extensively and can't identify any obvious cause. We use O365 and exchange, can you suggest any resolutions or further testing I can try as this is now causing extensive issues to our business.

Microsoft Exchange Online
Microsoft Teams
Microsoft Teams
A Microsoft customizable chat-based workspace.
9,022 questions
Outlook
Outlook
A family of Microsoft email and calendar products.
2,905 questions
{count} votes

1 answer

Sort by: Most helpful
  1. JimmyYang-MSFT 48,541 Reputation points Microsoft Vendor
    2024-03-12T08:38:24.1666667+00:00

    Hi @Matthew Shaw

    Are there any NDR error messages when email invites blocked?

    What is your environment now? Exchange Online or hybrid environment?

    If you send normal emails to external organization, can they receive it normally?

    It sounds like you have already done some troubleshooting to identify the cause of the issue. One thing you could try is checking if your domain is on any email blacklists. You can use a tool like MX Toolbox to check this.


    If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

    Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.