I realize this thread is a bit dated now, but in case anyone else needs this answer...
Yes, you can increase it by changing the config file using these instructions:
1. Stop the Mail Flow Central service.
2. Stop the MySQL service.
3. Make a backup copy of your my.cnf file — my.cnf.bak.
4. Use a text editor of your choice (one that will not imbed any formatting or RTF
information into a plain text document) to edit the c:/my.cnf file.
5. Change the maximum database size from the current value (this size is set to 10GB by
default in Mail Flow Central version 1.2) to your new desired value. You must never
reduce the value in the file. Find the following line in your file:
innodb_data_file_path = ibdata1:10G:autoextend:max:10G
Increase the value indicated after the string “max:” For example, to change the maximum
database size from 10GB to 90GB, the modified line would look like this:
innodb_data_file_path = ibdata1:10G:autoextend:max:90G
6. Save the c:/my.cnf file and exit the editor.
7. Start the MySQL service.
8. Once the MySQL service has started, start the Mail Flow Central service.
Hope that helps someone.
