It is in InterformNG2 possible to setup a workflow as an email reader from an input email server and extract data from the incoming email with the workflow input type, Read from email server.
First you need to click this icon:
and then you can add a new email server input setting like below:
Currently the only protocols supported are: IMAP and POP3.
The option to delete email does not not on all mail servers, Gmail e.g. ignores the delete function for POP3 connections.