In Constant Contact: create a new email → choose “Code your own” (custom code email) → paste this HTML. Images must already be hosted (Constant Contact library, your DAM, or any public URL).
Constant Contact build sheet
This email has conditional rows. Constant Contact shows dynamic content only in its drag-and-drop editor, so a custom-code send would show every variant. Build the approved email in drag-and-drop and give each row the rule below. Test sends won't show rows that depend on custom fields; use Constant Contact's preview toggles.