Summary
The Office 365 sender support form is located at sender.office.com. Access requires a Microsoft account. The portal provides tools and information to troubleshoot deliverability. If an IP is blocked, the delist portal within sender.office.com can be used. Monitor sender reputation with Microsoft's SNDS and JMRP. External tools, like MXToolbox, check blacklists. Review SPF, DKIM, and DMARC records. Follow email deliverability best practices. Other resources are available from Mailjet, SendGrid, SparkPost and Litmus for diagnosing and resolving delivery issues.
Key findings
- Sender Support Portal: sender.office.com is the primary resource.
- Microsoft Account: A Microsoft account is needed to access.
- SNDS & JMRP: Monitor reputation using SNDS and JMRP.
- Delist Portal: Use delist portal for IP blocks.
- Authentication: Review SPF, DKIM, and DMARC records.
Key considerations
- Proactive Monitoring: Regularly monitor reputation.
- Deliverability: Follow best practices.
- Troubleshooting: Use provided tools and information.
- External Tools: Leverage MXToolbox and other resources.
What email marketers say
10 marketer opinions
Finding the Office 365 sender support form involves several approaches. The primary method is to access the sender.office.com portal. Users must be logged into a Microsoft account (O365/Live/etc.) to use the form. If an IP address has been blocked, the delist portal within sender.office.com can be used. External tools like MXToolbox can help check domain and IP against blacklists. Microsoft's SNDS and JMRP programs can be used to monitor sender reputation. Additional steps include reviewing SPF, DKIM, and DMARC records, and implementing deliverability best practices.
Key opinions
- Primary Portal: The sender.office.com portal is the main resource for sender support.
- Microsoft Account Required: Accessing the support form requires a Microsoft account.
- Delist Portal: The delist portal within sender.office.com helps with IP block issues.
- External Tools: MXToolbox can be used to check blacklists.
- SNDS and JMRP: Microsoft SNDS and JMRP monitor sender reputation.
Key considerations
- Authentication Records: Ensure SPF, DKIM, and DMARC records are properly configured.
- Deliverability Best Practices: Follow email deliverability best practices to avoid blocks.
- Reputation Monitoring: Regularly monitor sender reputation with Microsoft.
- MS Account: A Microsoft Account is required to use the Office 365 sender support form.
Marketer view
Email marketer from EmailArchitect outlines general troubleshooting steps, starting with the sender.office.com portal. They advise to also review SPF, DKIM, and DMARC records.
22 Apr 2024 - EmailArchitect
Marketer view
Email marketer from SparkPost offers best practices such as proper authentication and list management to avoid being blocked by Office 365.
15 Sep 2023 - SparkPost
What the experts say
3 expert opinions
The Office 365 sender support form can be found at sender.office.com. In addition to utilizing the support form, it's crucial to monitor your sending reputation using Microsoft's Smart Network Data Services (SNDS) and Junk Mail Reporting Program (JMRP) to identify and address deliverability issues proactively.
Key opinions
- Direct Link: The direct link to the O365 sender support is sender.office.com.
- SNDS/JMRP Importance: Microsoft's SNDS and JMRP are crucial for monitoring sending reputation.
Key considerations
- Reputation Monitoring: Regularly monitor your sender reputation using SNDS and JMRP.
- Proactive Issue Identification: Use SNDS/JMRP to proactively identify and address deliverability issues.
Expert view
Expert from Email Geeks shares the correct link for O365 sender support: sender.office.com.
18 Mar 2025 - Email Geeks
Expert view
Expert from Email Geeks provides the context for the sender support link form.
31 Mar 2022 - Email Geeks
What the documentation says
4 technical articles
Microsoft's documentation provides multiple resources for addressing Office 365 sender support. The primary Sender Support portal is located at sender.office.com, offering tools and information for troubleshooting delivery issues. In addition, Microsoft provides guidance on troubleshooting blocked senders in Outlook, interpreting NDR error codes from Exchange Online Protection (EOP), and leveraging the Smart Network Data Services (SNDS) program to monitor IP reputation and complaint rates.
Key findings
- Sender Support Portal: sender.office.com is the primary hub for sender support resources.
- Blocked Senders: Microsoft provides steps to troubleshoot blocked senders within Outlook.
- NDR Codes: Understanding NDR error codes from EOP aids in diagnosing delivery problems.
- SNDS Program: SNDS helps monitor IP reputation and complaint rates.
Key considerations
- Troubleshooting Steps: Follow the recommended steps for troubleshooting blocked senders.
- NDR Interpretation: Accurately interpret NDR codes to identify the root cause of delivery issues.
- Proactive Monitoring: Actively monitor IP reputation and complaint rates through SNDS.
Technical article
Documentation from Microsoft Learn explains how to navigate to the Sender Support portal at sender.office.com. It outlines the tools and information available to troubleshoot delivery issues related to Office 365.
26 May 2021 - Microsoft Learn
Technical article
Documentation from Microsoft Learn describes how to interpret Non-Delivery Report (NDR) error codes from Exchange Online Protection (EOP). This helps diagnose specific delivery problems.
25 Nov 2023 - Microsoft Learn
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