User signed up, hit a paywall-free trial, has not done anything yet.
Hi {{first_name}},
Welcome to {{ProductName}}.
Start here to reach {{aha_moment}}: {{first_action_link}}
Estimated time: {{time_estimate}}.
Reply if anything looks broken.
{{Sender name}} One next action and one time estimate. Names the aha-moment outcome. Reply invitation in case anything is broken.
Single CTA. Specific time estimate ("90 seconds to first send"). A founder line for the first 1,000 signups.
A welcome that lists every feature. Multi-step drips that fire before the user has logged in once.