In case the images in your email are not appearing in GMail, then you might need to disable the HTTPS settings
To disable the HTTPS for your gmail account
- Log in to your Gmail account.
- Click "Settings" in the right corner.
- Scroll to the Browser Connection, under the General tab and check "Don't always use https".
- Click "Save Changes"
- Log out of Gmail.
Delete your browser cookies and try again.
In case you do NOT want to disable the HTTPS settings
- Refresh the screen using the F5 key
- In the security warning alert, choose No.
This should let you view the campaign email images in GMail.