Increase destination column size in mail_forwarding table
The current size of the destination column in the mail_forwarding table (255 characters) is too small for several of my forwarding lists. I have increased mine to a TEXT field (65,535 characters) which works fine, however every time I upgrade ISPConfig, the upgrade process changes it back to char(255) and my lists get truncated.
Please change the size in future releases. Another user reported this issue in the forums too.