I couldn't get this working with Gmail.
Tried setting up an Amazon SES account without a successful test.
Tried installing a free mailserver App and still couldn't complete a successful mail test from HikVision.
... but this worked:
Created a new email address with gmx.co.uk (or gmx.com).
Performing a HIKVISION Test send resulting in an automated email item from GMX titled "Failed access via e-mail program". This explains how to enable third-party app integration. As follows: In your GMX.co.uk mail settings, you must configure "Send and receive emails via external program (Outlook, Thunderbird).." and complete their Captcha to enable this feature.
My Email settings are:
Sender:myname@gmx.co.uk
Sender's Address:myname@gmx.co.uk
SMTP Server:mail.gmx.com
SMTP Port: 587
(ticked) Enable SSL
(ticked) Attached Image
Interval:5s
(ticked) Authentication
User Name:myname@gmx.co.uk
Password/Confirm:***************
Notes: Port 465 didn't work for me, 587 does.
Not all emails contain an image attachment(s), which I'm currently investigating.
I've used TeamViewer to remotely access my home PC to configure through Internet Explorer via http://192.168.1.115
I hope this helps those struggling with email setup!
Best wishes,
Nick H