Common issues with Microsoft SNDS encompass access problems, data discrepancies and interpretation difficulties, blocking events, integration challenges, limitations in scope, the impact of IP reputation, and potential authentication failures and false positives. Users report challenges accessing the platform, as well as discrepancies between SNDS data and other sources, potentially caused by differences in data processing. Expert opinions highlight SNDS's complexity and limited scope, as it only reflects traffic to Microsoft's email services. Improving sender reputation, ensuring proper authentication, maintaining clean email lists, and adhering to Microsoft's guidelines are essential for mitigating these issues and achieving successful email delivery.
13 marketer opinions
Common issues with Microsoft SNDS (Sender Network Data Services) include access problems, data discrepancies, blocking issues, integration challenges, and the impact of IP reputation, complaint rates, and spam trap hits. Users also report issues with data refresh rates and potential false positives. Proper list hygiene, careful integration testing, and close monitoring of sender reputation are essential.
Marketer view
Email marketer from Email Marketing Forum explains that the SNDS data refresh rate can vary, and there may be delays in data updates. Users should be patient and allow sufficient time for data to be updated before making critical decisions based on SNDS data.
27 May 2025 - Email Marketing Forum
Marketer view
Email marketer from Email Deliverability Forum shares that SNDS blocking issues can arise from sudden spikes in email volume, poor list hygiene practices, and sending emails to spam traps. Consistent monitoring of SNDS data is essential to identify and address these issues.
26 May 2022 - Email Deliverability Forum
4 expert opinions
Experts agree that common issues with Microsoft SNDS involve data inaccuracies and difficulties interpreting the data due to the platform's complexity and lack of comprehensive documentation. The data is also limited, only reflecting traffic to Microsoft's services (Outlook/Hotmail). Maintaining a good IP reputation is important as reported by SNDS to delivery your email
Expert view
Expert from Word to the Wise answers question about how SNDS reports your IP reputation which directly affects delivery of emails to Outlook and Hotmail accounts. Maintaining a good reputation, achieved through legitimate sending practices, is vital for reaching Microsoft's users' inboxes consistently.
17 Jul 2024 - Word to the Wise
Expert view
Expert from Spam Resource explains that difficulties in interpreting SNDS data can arise from the platform's complexity and lack of comprehensive documentation, making it challenging for senders to accurately diagnose deliverability issues and implement effective remediation strategies.
11 Nov 2022 - Spam Resource
5 technical articles
According to Microsoft's documentation, common SNDS issues involve access problems due to incorrect permissions, rate limiting due to excessive requests, authentication failures from incorrect credentials, awareness of data retention policies and addressing the root causes for blocking. To resolve these issues, one should improve sender reputation, reduce complaint rates, and implement proper authentication.
Technical article
Documentation from Microsoft Documentation explains that SNDS can implement rate limiting to protect its infrastructure from abuse or excessive data requests. Users encountering rate limiting should optimize their API requests and adhere to documented guidelines.
30 Jul 2023 - Microsoft Documentation
Technical article
Documentation from Microsoft Support explains that SNDS authentication failures can occur due to incorrect credentials or misconfigured API settings. Users should verify their authentication details and follow the recommended troubleshooting steps.
30 Aug 2021 - Microsoft Support
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