Troubleshooting
Microsoft Outlook is not sending emails
5min
If you're using Firstsales.io to send emails via Microsoft Outlook and encounter issues where emails are not being sent or accounts become disconnected, several factors could be responsible. This troubleshooting guide will help you identify and resolve common issues, including:
- Exceeding daily sending limits
- Account suspensions
- Configuration errors
- Other potential problems
1. Exceeding Microsoft Outlook Sending Limits
Microsoft enforces specific sending limits to prevent spam and ensure system reliability. If these limits are exceeded, your account may be temporarily restricted from sending emails. Key limits include:
- Daily Sending Limit per User: Up to 10,000 recipients per day. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
- Recipients per Message: Up to 500 recipients in the To, Cc, and Bcc fields combined. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
- Recipient Rate Limit: A maximum of 10,000 recipients per 24-hour period. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
Exceeding these limits can result in a temporary suspension of your sending capabilities. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
2. Account Suspension Reasons
Microsoft may suspend accounts for various reasons, including:
- Suspicious Activity: Unusual sending patterns or behaviors that resemble spam can trigger automatic suspensions. https://support.microsoft.com/en-us/account-billing/account-has-been-locked-805e8b0d-4141-29b2-7b65-df6ff6c9ce27
- Policy Violations: Violating Microsoft’s mail policies, such as sending spam or harmful content, can lead to suspension. https://www.microsoft.com/en-gb/DigitalSafety/moderation-and-enforcement/account-suspension
- Unverified Sign-ins: Sign-in attempts from unrecognized locations or devices may result in temporary suspensions to protect account security. https://support.microsoft.com/en-us/account-billing/account-has-been-locked-805e8b0d-4141-29b2-7b65-df6ff6c9ce27
3. Configuration Errors
Incorrect settings can disrupt email sending. Ensure the following configurations are correct:
- SMTP Server Settings:
- Server Address: smtp.office365.com
- Port: 587 (TLS)
- Authentication: Use your full Outlook email address and password.
- OAuth 2.0 Authentication: Ensure that OAuth 2.0 is properly configured, as older authentication methods may not be supported.
4. Other Potential Issues
- Billing Problems: Unresolved billing issues can lead to account suspension. Verify that your billing information is current and that there are no outstanding payments. https://support.microsoft.com/en-us/office/reactivate-an-account-that-has-been-blocked-08e0c662-384e-40ab-876e-6ffa35a547a6
- Third-Party App Interference: Authorized third-party apps with access to your account can cause unexpected changes, including suspensions. Review and manage app permissions regularly. https://support.microsoft.com/en-us/account-billing/account-has-been-locked-805e8b0d-4141-29b2-7b65-df6ff6c9ce27
- Domain Registration Issues: Expired domain registrations can disrupt email services. Ensure your domain is active and properly configured. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
Troubleshooting Steps
- Check Sending Limits: Review your email activity to ensure you haven’t exceeded Microsoft’s sending limits. If you have, wait 24 hours for the limits to reset. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
- atus*: Log in to the Microsoft Admin Center to check for suspension notices or alerts. If suspended, follow the provided instructionccount. https://support.microsoft.com/en-us/account-billing/account-has-been-locked-805e8b0d-4141-29b2-7b65-df6ff6c9ce27
- Verify SMTP Settings: Ensure that your SMTP server settings in Firstsales.io match Microsoft’s recommended configurations.
- Update Authentication Methods: Confirm that you’re using supported authentication methods, such as OAuth 2.0, especially if using devices or apps that may not support newer protocols.
- Inspect Third-Party Apps: Review any third-party applications with access to your Microsoft account to ensure they are not causing issues. https://support.microsoft.com/en-us/account-billing/account-has-been-locked-805e8b0d-4141-29b2-7b65-df6ff6c9ce27
- Contact Support: If issues persist, reach out to Microsoft Support or consult the Firstsales.io support team for assistance.
Preventive Measures
- Monitor Email Activity: Regularly track your email sending patterns to stay within acceptable limits.
- Educate Users: Ensure all users are aware of Microsoft’s policies and sending limits to prevent accidental violations.
- Regular Audits: Periodically review account settings, third-party app permissions, and domain statuses to maintain seamless email operations.
Logical Reasoning: Ensuring Comprehensive Coverage
To ensure this guide addresses all potential issues, consider the following questions and answers:
- What happens if I exceed the daily sending limit?
- Your account may be temporarily restricted from sending emails. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
- Can third-party apps cause account suspensions?
- Yes, authorized third-party apps can make changes on behalf of the admin, potentially leading to suspensions. https://support.microsoft.com/en-us/account-billing/account-has-been-locked-805e8b0d-4141-29b2-7b65-df6ff6c9ce27
- How can I restore a suspended Microsoft account?
- Use the Microsoft account reset page to reactivate the account, provided the suspension wasn’t due to severe policy violations. https://support.microsoft.com/en-us/office/reactivate-an-account-that-has-been-blocked-08e0c662-384e-40ab-876e-6ffa35a547a6
- Are there specific SMTP settings required for Microsoft Outlook?
- Yes, usem with port 587 (TLS), and ensure proper authentication.
- What should I do if my domain registration expires?
- Renew your domain registration promptly to prevent dl services. https://learn.microsoft.com/en-us/office365/servicedescriptions/exchange-online-service-description/exchange-online-limits
Updated 02 Dec 2024
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