How to convert multiple CommuniGate email to MBOX file format with attachments? If you need to solve this issue then try CommuniGate to MBOX Converter. The professional program support all the Windows operating system of 32 bit and 64 bit. CommuniGate email to MBOX file format conversion program convert multiple CommuniGate email to MBOX file format in just one and saves the precious time of users. Download demo edition of this converter to convert first 25 CommuniGate to MBOX for free.