Hello Aarron, when I use the webmailer of my hoster and send an email to nonsene@blablaba.de I DO get an undeliverable email back. If I use my local outlook + MDaemon nothing comes back (in the w...

If you disable activesync entirely for a period of time does the CPU usage look normal then? Can you upload another set of webmail and airsync logs for us to look at?    

At the time when the logs ended, the MultiPOP check had not seen the bounce message yet. POP3 clients connect to the server, clients asks the server for a list of messages, client downloads messag...

Hi Arron, You are right, there has to be some usage of CPU, But what we are seeing is not normal, Spikes of CPU usage from worldclient.exe every 10-15s, from 20% up to 50% or more. We have arroun...

HI Arron, ok, I uploaded the files. I sent the testmail to "example@may-marketing.de" (the domain is ours as well, but there's no such user). Kind regards Klaus-Peter

Yes it does.  https://help.mdaemon.com/SecurityGateway/en/dmarc_verification.html We have fixed a number of issues in our ARC implementation for SG 11.0.0, which is currently in beta.  T...

@Arron does SecurityGateway support the ARC function?Can't find anything about this in the help.

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...