The Delayed email cancel key component is used together with these workflow components:
1.Cancel delayed email. Use this component to cancel a delayed email.
2.PDF Delayed email. This defines a delayed email.
3.Send emails from delay queue. This sends out any delayed emails, that has not been canceled.
There is also an email log option to cancel a delayed email.
The Delayed email cancel key can be used for setting a unique cancel key for an email, so that it can be canceled (In the InterFormNG2 settings) by referring to this key.
The Delayed email cancel key component has this parameter:
Cancel key
Here you should setup a unique cancel key, so a specific email can be canceled from the InterFormNG2 settings.