Moreover, adding the entire mailbird.exe processes and domains to exclusions is not a safe strategy.
The process/file exclusions setting is rarely, if ever, needed, and only then for one's AV (not for other legit processes or applications). If you exclude mailbird.exe from MBAM's protection, you are creating a security hole.
Similarly, MBAM blocks IPs and websites for a reason. While it's possible that the IP blocks could be a False Positive, adding them to exclusions without further research could be dangerous.