You had better use gmail, not yahoo or hotmail.
1. Connect NVR to router by ethernet cable.?Pay attention: there are 4 ethernet ports at back of NVR which includes 3 LAN port and 1 WAN port. Please use WAN port to connect router, not LAN port.
2. Check P2P status and make sure it is online.
3. Go to Motion detection set up. Enable it and tick Email motion option.
4. Please log in your gmail account.
5. Please open the website below
6. Please tick turn on.
7. Please set up email in DVR setting like picture below. If mail test succeeds, it is working.
SMTP server is smtp.gmail.com
port is 587 or 465.
user name is your gmail account
password is your gmail password
sender is your gmail account
sendee is receiver and can be any email