I have disabled AntiVirus- Software and nothing has changed.
This is really strange, I can Access the URL with browser and the problem with the EM Client connection is that the Server does not seem to be reachable.
Here a screenshot of the EWS page using the Browser on the same PC where also EM Client is installed:
I've seen Kerio's web interface not play nicely with some anti-virus and other scanning solutions. Particularly those that meddle with the HTTP(S) connection. Perhaps it could be related to that if you have them running on the UTM.
Once I had Kerio Connect up and running, I wanted to see what was involved in creating user mailboxes. I also wanted to attach a client to the mail server to see what the end-user experience was like.
Once I had set up a few user mailboxes, I created a Windows 10 VM, and then downloaded the email client. Kerio Connect supports a variety of clients, and there is even a connector component for Outlook. For this review, however, I decided to try out the 64-bit Kerio Connect Client for Windows. GFI also offers a 32-bit version of this client, as well as a macOS version.
Initially, I had problems getting the client to connect to the mail server. After a bit of trial and error, I realized that the Kerio Connect installer does not automatically open the necessary firewall ports. Once I opened those ports on the mail server, the client was able to connect with no problem. You can see what the Kerio Connect Client looks like in the next screenshot.
One of the things that make the Kerio Connect Client different from some of the other clients on the market is that it has a built-in instant messaging feature. You can see what the instant messenger looks like in the next screenshot.
I also found that the Kerio Connect client allows you to label events and set reminders in a way that is very similar to Outlook. You can even add an attachment to a calendar item. You can see an example below.
Overall, I was really impressed by Kerio Connect. It has proven to be a very competent mail server that can hold its own against higher-priced competitors. End-users will find that the Kerio Connect Client includes all of the features that they have come to expect, but users also have the option of using a client of their own choosing.
I can't open png/jpg/pdf attachments directly to Preview app from Kerio Connect client app. but managed to locate the attachment in /private/var/folders.... and was able to open it from there. Permissions all looked ok. file in the /private/var/folders... are unlocked. What else should I do? No problems with Big Sur and older.
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