To help you manage speaker communications more thoughtfully, especially for VIPs or high-profile guests, you can enable the 'Suppress non-critical emails?' settings to give you more control over which emails are sent out.
To enable this for a speaker, head to Content > Presenters, click the "..." next to the speaker's record, then go to the Settings tab and toggle on the 'Suppress non-critical emails' option.
When enabled, the speaker will not receive the following types of emails:
Notifications about new comments or replies
Automated talk reminder emails
Post-event messages like “Thanks for being a part of the event”