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Support 0 Reputation points
2025-11-24T20:28:18.05+00:00

I am unable to receive mail via our business mailboxes

Microsoft 365 and Office | Other
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  1. Carlo Luna 6,895 Reputation points Independent Advisor
    2025-11-24T21:11:04.6566667+00:00

    Hi Support,

    Thanks for reaching out. I know how disruptive it can be when emails stop coming through. Let’s work through this together.

    First, check your domain and DNS settings. Make sure your domain is verified in the Microsoft 365 Admin Center and that your MX records point to Microsoft 365 (<domain>.mail.protection.outlook.com). Incorrect DNS records are often the root cause of mail flow issues. You can also use tools like MXToolbox to confirm everything looks good.

    Second, confirm that the affected mailbox is active and licensed for Exchange Online. If the license has expired or the mailbox is disabled, incoming mail will be blocked.

    Third, run the Microsoft Support and Recovery Assistant (SaRA). This tool can automatically diagnose and fix common issues like profile corruption, sync problems, and connectivity errors.

    Next, check mail flow using Message Trace in the Exchange Admin Center. This will show if emails are reaching Microsoft 365 or getting quarantined. If you don’t see any trace, the issue might be with DNS or external routing.

    Finally, review the mailbox settings. Ensure there are no delivery restrictions, rules, or filters that might be redirecting or deleting messages. Also, check the Junk folder and quarantine for any misplaced emails.

    I hope you find this information helpful. Please let me know if you have any further questions If the answer is helpful, please click "Accept Answer".

    Regards,
    Carlo

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  2. Q&A Assist
    2025-11-24T20:28:27.5166667+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    If you are unable to receive mail via your business mailboxes, there are several potential issues to consider:

    1. Mailbox Approval: Ensure that the mailboxes are approved for email processing. You can do this by navigating to Settings > Email Configuration > Mailboxes, selecting the mailboxes, and then clicking Approve Email.
    2. Email Server Profile Configuration: Check the configuration of your email server profile. Make sure that the incoming and outgoing email ports are set correctly according to your email provider's documentation. For example, for Gmail, the incoming POP3 port is 995, and the outgoing SMTP port is 587.
    3. Check for Alerts: Review the Alerts section of your mailbox record for any specific errors or alerts that may indicate what the issue is. Common alerts include incorrect credentials or insufficient permissions.
    4. Test & Enable Mailboxes: After making any changes, use the Test & Enable Mailboxes feature to retest email processing for the enabled mailboxes. This can help identify any remaining issues.

    If you continue to experience problems, it may be beneficial to consult with your Exchange administrator or check your network configuration for any issues related to email delivery.

    References:

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