In amoCRM you can connect your mailbox. All new letters from unknown boxes (in the system there is no attached contact / company / leads) fall into the incoming leads.
On the letter mark the minimum information is displayed: the sender, time and brief information about the letter.
When you drag the application to any stage of the pipeline, the lead and the contact from which the letter is received are automatically created.
If you add a lead or contact for the letter - it disappears from the unsorted. In this case, if you unsubscribe a letter from a lead or contact - it will not appear in the incoming leads. You can not translate the letter yourself into incoming leads