Use custom event emails when the built-in transactional emails do not cover the message you want to send. You can create a one-off Broadcast or an ongoing Auto campaign.
Custom email creation requires the Email Broadcasts & Sequences plan feature. Trial accounts cannot create broadcast or automated emails, and email creation may remain unavailable until the account email address is verified and the trial is complete.
Create the email
Go to Emails and select Create Email.
Choose Broadcast for a one-off send or Auto for an ongoing campaign, then select Create.
Add the subject and message content. Use mail merge fields only when the selected message and audience make that field available.
Open Audience Filters to choose who should receive the email.
Set the scheduling rules, then review the Message Settings, including the internal title and customer-facing subject.
Preview the email and send a test message before relying on the scheduled send.
When settings are locked
Audience rules cannot be changed for transactional emails, follow-up emails, or messages that have already been sent. Scheduling rules are also locked for transactional emails and already-sent messages. Duplicate an eligible broadcast or automated email when you need a new editable copy.