Calendar meeting invitations are duplicated
radarsymphony last edited by
I am experiencing an issue where calendar event messages are sent twice from kopano. These calendar -related events originate in a kopano inbox in our system and are sent to another kopano inbox in our system. I have not heard any reports of external clients creating or receiving this issue.
When a calendar event is created, the recipient receives two event notifications (e.g., update to event, new invitation, cancellation, etc). This duplication seems to just happen with calendar-related messages only (as opposed to other mail) and happens sporadically (i.e., I am having trouble identifying cause and replicating).
I compared the two message headers and see two similar, but slightly different messages.
- Same Message-Id
- Received by MTA at same second
- both received by kopano-spooler at same time
- Different ESMTP id
- Differences in dkim b value etc
This leads me to believe that the messages are duplicated leaving the sender’s inbox potentially on-route to the spooler via MAPI? Having trouble tracking it down.
Our system is running in docker containers.
kopano core v11.0.2
I am not sure what else would be useful, but I will look for whatever will help us identify the cause.
I have looked through the following posts, but each seems to be describing a different issue than I am experiencing. The first post is seems the most similar: