Outlook Deliverability: A Silent Shift with Serious Consequences

Starting on June 17th, 2025 at 11:10 UTC, multiple high-volume senders – particularly in France – began experiencing a sudden surge in DKIM failures on emails sent to Microsoft domains (Outlook, Hotmail, etc.). These bounces occurred even though SPF and DMARC were properly configured. What We’ve Observed Our engineers quickly identified the root cause: a […]

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Categories: Authentication, Deliverability, Providers

How Omeda Transformed Email Delivery with Postmastery

Omeda, a leading audience data platform, recently modernized its email infrastructure by partnering with Postmastery. Faced with growing email volumes and an aging internal system, Omeda made the strategic shift to PowerMTA, supported by Postmastery’s deep expertise in email delivery optimization. The results? Faster, more reliable delivery, crucial for time-sensitive communications, plus streamlined operations and […]

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Categories: Case Studies, Deliverability, General, Solutions

Deploying Business-Critical Emails with PowerMTA on Azure: A Bluetooth SIG Case Study

Objective: new email delivery solution Bluetooth SIG sends hundreds of thousands of automated outbound messages daily and successful email delivery is critical to Bluetooth SIG’s operations. Due to various technical constraints, Bluetooth SIG started a RFP process in early 2018 to select and implement a new email delivery solution, the Microsoft Azure hosted PowerMTA Project […]

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Categories: Case Studies, Deliverability, General, PowerMTA

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