When you spin up a Microsoft 365 environment to handle email for your corporate or other organization, the system assigns you a default email domain that looks like something.onmicrosoft.com. T…
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Do you host your domain's email service on Microsoft Exchange Online/Microsoft 365? If so, you should note that IPv6 support is coming , and that Microsoft is enabling that s…
Did you know that Microsoft Outlook.com and O365 emails include special headers that break down the spam filtering results for email messages? These headers can help you decode t…
Microsoft recently announced that Exchange Online -- the email (and calendar, contacts and tasks) functionality provided in Microsoft 365 and Office 365 , will be subject to outb…
Bounce message. SMTP rejection. Deferral message. Non-delivery report (NDR). 5xx error. 4xx error. No matter what you call them, there are a zillion different kinds of them out …
