Task Email Relationship

Dear community,

there is no way to add task_email relationship? I tried to add the relation to task, but i cannot find email module in the related module dropdown list.

We want to create tasks triggered by inbound emails automaticlly and we need the created task automaticlly attached to this email. If this is not possible, which module is better then task in this case? Or should i just create my own custom module?

Thx in advance!