If your users spent Thursday afternoon staring at Outlook connection errors, they were not alone. A widespread Microsoft 365 outage that began yesterday (November 12, 2026) cut off access to Exchange Online mailboxes and the Microsoft services that depend on them, and recovery was still underway on Friday morning.
If you run your own mail server or manage email for clients, Spamhaus probably has more influence over your deliverability than you'd like. Spamhaus says its data protects 4.5 billion user mailboxes, so a listing can quickly turn into bounced mail and frustrated users.
In our last post, we discussed how to troubleshoot a missing inbound email in MDaemon (read it here). Today, we flip the scenario & discuss how to troubleshoot outbound email delivery issues.
Few support tickets are as common, or as frustrating, as "I was expecting an email and it never showed up." As an MDaemon administrator, your task is to determine the cause, which could be anywhere along a chain that stretches from the sender's outbox, across the internet, through your DNS and security layers, into MDaemon's queues and filters, and finally out to the user's mail client.
What's New in MDaemon 26.5
MDaemon 26.5 adds support for load balancers, a faster way for IMAP clients to move messages, and a refreshed Webmail theme. It also brings improvements to the ticketing system and Webmail security settings, plus the ability to brand the sign-in pages for Remote Administration and Webmail. Here is a closer look at what’s new.
October is Cybersecurity Awareness Month, which means it’s a good time for IT administrators and MSPs to review their email defenses. Email is still one of the most common ways attackers get into an organization. As we noted in our MSP post below, the FBI's Internet Crime Complaint Center logged more than $20.8 billion in reported losses in 2025, and business email compromise alone accounted for roughly $3 billion of that total.
Relying on users to configure their own mail clients can often lead to unexpected issues. A user enters the wrong port, picks STARTTLS where SSL was expected, or misspells the server name, and the result is often a help desk ticket.
Calendars are one of the features users notice most when they stop working, and one of the more common support requests from an administrator’s point of view. Where is the data stored? Which clients can connect? What do you need to back up so a restore brings calendars back intact?
Most email compromises don’t have to rely on sophisticated exploits; they often start with basic configuration gaps such as a missing SPF record, disabled screening rules, or misconfigured settings.
MDaemon includes a built-in Web Conferencing Server (added in version 25.5.0), allowing users to start audio, video, screen sharing, and chat sessions directly from MDaemon Webmail. Because the entire system runs on your own server, no conference data passes through a third-party cloud service unless you specifically choose to add one.
