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Postmastery has published the tenth edition of its Email Delivery Benchmark, covering April to June 2026. It is drawn from 15.5 billion transactions sent by large ESPs and compares delivery, bounce and deferral rates at 15 mailbox providers Comcast was the hardest provider to deliver to. It accepted 88.12% of mail sent to it, bounced […]
Microsoft’s service-health record, as extracted for one large tenant, shows three Exchange Online incidents between 31 August and 9 September. None shares a cause with the others. 31 August to 3 September: MO1465074 At 14:56 UTC on 31 August, Microsoft opened an incident covering Exchange Online, Microsoft Graph, Teams, Purview, Defender XDR, OneDrive, SharePoint, Universal […]
Twilio SendGrid reported a significant increase in Microsoft 365 blocking last week, with block rates rising by 10 to 15 per cent across its sending IP estate. The incident began at approximately 21:45 UTC on 14 August. SendGrid said the increase affected domains hosted on Microsoft 365 and was being seen across all Twilio SendGrid […]
Microsoft has removed spam-trap hit counts from the SNDS Data Report as of 22 July, compounding a JMRP migration that already strips complaint bodies and sender details.
Postmastery has released the ninth edition of its Email Delivery Benchmark, covering January to March 2026. The report is built from 15.5 billion email transactions and sets out how mail from participating senders performed across fifteen mailbox providers. The headline is steady. Most major providers accepted well over 97% of mail. Seznam led on delivery […]
The FBI has issued a public service announcement (PSA 260521, 21 May) warning about Kali365, a phishing-as-a-service platform first spotted in April and sold mainly through Telegram. It is still making mainstream news three weeks later, and for good reason: it represents the clearest sign yet that commodity phishing has moved past credential theft entirely. […]
On January 22, 2026, Microsoft experienced a major outage affecting Microsoft 365, Outlook email, Teams, and other cloud services, impacting tens of thousands of users across North America and beyond. The disruption interrupted critical email communication, collaboration, and file access during peak business hours, underscoring the challenges of maintaining reliability in large-scale cloud infrastructure. (Reuters) […]
Cybersecurity professionals are facing a new challenge that’s quietly undermining traditional email defenses. Threat actors have discovered that Scalable Vector Graphics (SVG) files offer an almost perfect camouflage for phishing attacks, exploiting both technological blind spots and human psychology to devastating effect. A Wolf in Sheep’s Clothing The beauty of SVG-based attacks lies in their […]
Microsoft Outlook and Hotmail experienced a significant global outage beginning July 9, 2025, at around 22:20 UTC, extending into July 10, disrupting email access for millions of users worldwide. Some have been discussing online the impact and indicating stats will be whack as a result. It is important to understand the important but not overstate it. We […]
There’s a lot to think about when building an email; headers, footers, testing and of course the content itself. Here’s Part 2 in ‘Email Anatomy’ series, where Andy Thorpe from Pure360 takes you through the from name, reviewing the preview pane appearance and pre-headers. From name This is the bit in the inbox that shows […]
