If you are seeing an email appear twice in your inbox (i.e. duplicate emails), this is generally because you are using the Unified Inbox feature - this means that if you have two email accounts connected to Mailbird with the Unified Inbox enabled, you will receive an email (which was sent to both email addresses) in each individual inbox. Consequently, this email will be displayed twice in the Unified inbox, and will seem to be duplicated, but in reality it isn't.
You can disable the Unified inbox, and these emails will no longer appear to be duplicated. It's important to note that Mailbird does not 'merge' identical emails.
In order to find out how to disable the Unified Inbox view, please click here to see what steps to follow, but if you still require assistance, please do not hesitate to contact our Customer Happiness Team by clicking here.