What components are
A component is a piece you compose messages from, so you write it once and use it many times:
| Component | What it is |
|---|---|
| Header | The top block of an email: headline, subhead, hero fields. One value per field. |
| Summary | The body block: title, message, call-to-action label and link. |
| Signature | Who it is from, as text and image. |
| Sender | The from name, from address and reply-to HubSpot will use. |
| Template | The HubSpot email template the content renders into. |
A message picks one of each and becomes one email's content. Changing a component changes every message that uses it; check Dependencies on a component before editing something that is live.