Did you know you can configure your topic to allow for an email to trigger the send of a plain text bulletin?
If you need to get a quick message off to a subscriber group, as long as the feature is enabled, you can write an email message and send it to the unique topic email address which will cause your message to be sent to all subscribers.
This feature is configured by topic so you can turn this feature on for some topics and not others.
Learn more about the send by email feature on the Granicus support site.
If you have specific questions about how to set up your topics to trigger an email send you can reach out to govDelivery support for help.