Some CPU usage is normal. How much CPU is webmail using after disabling the contact sync?  How many webmail users to you have?   How many ActiveSync users do you have?

If the ISP is generating the bounce, and you can see it in the hosted mailbox, then we need to figure out if its being downloaded by MDaemon.   Can you upload MDaemon's MultiPOP and rout...

Update: my provider says that "bouncing" are being sent back to the sender. We tested this and this is what they have sent back: "This message was created automatically by mail delivery software....

Many thanks for the quick answers! Sorry, it was actually the mail server behind it. I deactivated DMARC there and the message went through.

After disabling the sync of the above mentioned user's contacts, we still have a high CPU usage. On the other hand, in the graphs we see that the high usage tends to be during office hours.  ...

Hello Arron, thank's for answering my post! That's superb service, almost no other software company is offering. Always worth a recommendation your software and your service! Thanks! As to the pr...

Are the messages being sent out via MDaemon?  What does the outbound SMTP log show is happening? In Remote Administration under Setup | Mail Queues/DSN, in the section for "Fate of underliver...

Hello Everybody, when we send out emails to incorrect emails we don't get any bounces at all (we download them per Multipop to our local MDaemon). However, when we bypass MDaemon and access an IM...

Indeed, that was the problem. Thanks a lot! 

Login to Remote Administration as the Global Admin.  Go to Main | Remote Admin Settings.  If the box for "Enable mailing list subscriptions manager." is not checked, check it.  It ...

Hello:I was running MDaemon server in a very old version (15), and recently updated it to latest version available (25.02). Fortunately everything went well, but after few days using the new versio...

Is the "550 Message rejected due to senders DMARC policy" error being returned by SecurityGateway or by the server SecurityGateway is trying to send the message to?  The message transcript inc...

Thank you very much for the quick solution, I tested it and it works. The times obtained, I tested several sessions, are between 35 and 47s. Even before the upgrade it didn't open instantly, star...

There is a user on your server that has a large contacts folder (12496 items) and their phone is repeatedly synching the contacts.  The user is mi*****.go*****za@yourdomain.com.  Can you ...

We have fixed this for the next version of MDaemon.  If you'd like the fix now you can download the WebAdmin.dll from https://mdaemon.sharefile.com/public/share/web-sdcafb10a7ba44de284eb137f43...

Check this : The DMARC reject policy instructs the email-receiving servers to refuse to accept email that fails DMARC verification. This behavior is a great way to combat the sending of unauthoriz...

Hello Oliver, Check ANTI-SPOOFING and DMARC VERIFICATION. Send screenshoot please.

Hello, I always get the result "Delivery failed" in the message log for the following mail I cannot find an error in the DMARC processing in the average.The sender is also on the whitelist ........

We are still working on it.

Hi Arron,  Have you been able to check  the airsync log?