When notifications are sent from Expiration Reminder they have a special code in them that when the receiver replies and sends it, automatically Expiration Reminder receives the request and saves it the system. It then notifies the account owner of an incoming message.
The person that replies the message can do so from any email client including Microsoft Outlook, Gmail, iOS Mail, Android Inbox, etc. All clients are supported by Expiration Reminder.
You’ll notice that a message was received by having a look at the envelope icon on the top menu.
To view messages, click on the envelope icon on the top menu and then click on View All Messages.
The inbox shows a list of all messages received that are still with an active status.