I’ve now added the option to send text-only e-mails. This will apply to all e-mails coming from WxNotify. (weather alerts, daily forecasts, monthly tests, etc.)
You can turn this on by signing into your account at https://www.wxnotify.com/login/, clicking on profile menu in upper right and selecting “Settings”. The first option is now “Send emails in HTML format. (sends plain text emails if set to ‘No’)”, which is set to ‘Yes’ by default. To change, just move the slider to “No” and apply the settings.