When setting up a forwarding on a mailbox with 2 or more forwarding addresses SolidCP sends the command through with a comma as entered into the solidcp.

This causes issues with version 17 of smartermail and higher as the forwarding api commands have changed.

See below example when creating a forward within SolidCP and specifying two or more forwarding email addresses

When setting two or more forwarding addresses within smartermail, SolidCP is unable to read the second or subsequent forwarding addresses.

Answered question