I believe I found and fixed the issue, can you try the update process again for me?

@Arron  Russian language Ip address - 37.19.202.45

I have not been able to reproduce the issue. Can you confirm that the issue is still occurring for you? What language MDaemon install are you using? If you ping files.mdaemon.com, what IP addres...

The content of the CFAttachwrn.dat file can only be in plain text.  There is a content filter action that you can use to insert an HTML warning, however, the only way I found to detect the me...

@Arron  Hi Arron, We have the same problem. We can't upgrade from version 25.0.3. There was an error. Please check your internet connection and try again. Best regards, Slava  

Microsoft fixed the issue originally discussed in this thread, unfortunately there is another issue in Outlook that prevents the calendar from synching correctly, which sounds like the issue you ar...

It is.. Thanks, Leigh!

Is it possible to customize the message from the cfattachwrn.dat file and replace it with an HTML formatted message that users would receive instead of the plain text one? Here’s the current...

Hi everyone, I’m still experiencing the same issue described in this thread — Outlook (after version 2312) does not upload or modify calendar appointments to the MDaemon server via Act...

Thank you for the clarification.  For now I will reconfigure my ACME client and scripts to point to the 'Personal' certificate store.  I would say it would be good to add the WebHosting s...

Our System Requirements page lists examples along with number of users here: https://mdaemon.com/pages/mdaemon-system-requirements It does not really have examples for Windows 11, because that is...

MDaemon does not currently let you configure where it looks for certificates. It looks in the local machine's "Personal" and "Trusted Root Certification Authorities" certificate stores.  The c...

After much grief with Server 2022 in our small office environment we're considering either (a) an upgrade to Server 2025 or (b) a dedicated Windows 11 machine for MDaemon. What's the official reco...

I'm testing the new version of Mdaemon specifically for the 'Automatically detect and activate newer certficates' feature.   I do have one question- on this particular server the certfic...

This should be fixed, let us know if you are still having issues

We'll get it fixed up. For now you can work around it by manually downloading from https://mdaemon.com/pages/downloads-mdaemon-mail-server-free-trial . Thank you for letting us know.

Hi Arron, We're having trouble downloading this update to MD25.5.0 using the MDaemon Software Product Update Checker.  Downloading seems to get most/all the way through and ends with There w...

Just an update that the rule has been catching bad messages.  Great work Matthew!

MDaemon 25.5.1 is now available! It can be downloaded from https://mdaemon.com/pages/downloads-mdaemon-mail-server-free-trial. MDaemon 25.5.1 - 10/7/2025 CHANGES AND NEW FEATURES [28571] W...

SecurityGateway 11.0.3 is now available! It can be downloaded from https://mdaemon.com/pages/downloads-security-gateway-free-trial. SecurityGateway 11.0.3 - 10/7/2025 CHANGES AND NEW FEATURE...