Sending

Three shapes of a send, and everything that surrounds them.
  • A campaign is one email, one audience, one departure. You pick the moment: now, or a date.
  • A sequence is a journey. Contacts enter on a trigger — joining a list, receiving a tag — and walk the steps at their own pace. Two contacts who entered a week apart are in two different places.
  • A series is a sequence on a calendar instead of a trigger. Nobody is enrolled and nobody walks anything: the whole audience receives dated operations together — step 1 on day 1, step 2 three days later.
Not sure which one you need? Campaign, sequence or series? tells them apart in one line each, with an example of all three and the question that picks the right one.
All three go out against the same balance, under the same rules — a verified domain, a valid sender address, a working unsubscribe link.

Before the first email

Four things must be true, and the sending settings screen shows them as a checklist:
  1. your organization is allowed to send;
  2. a domain is verified and proved;
  3. the sender address book has an address on it;
  4. your balance covers the audience.
Anything missing is named rather than guessed at — why a send is refused lists every case and the one action that clears it.

Who never receives

Three exclusions are applied at departure, not when you pick the audience:
  • unsubscribed contacts;
  • addresses on the suppression list — hard bounces and spam complaints, permanent and organization-wide;
  • people who declined the send's topic.
Which is why the number of emails sent is often lower than the audience you were shown.

Before you press send

The spam risk report reads your subject, preview text and body the way a filter would, and names what is likely to hurt — a subject that oversells, urgency that is not real, a missing unsubscribe link. It is advice, never a gate: it has never stopped a send.

After

Every send is logged per recipient. The statistics say what arrived, what was opened and what was clicked — and are honest about what those words can and cannot prove. New contacts arriving through a form pass through sign-up and double opt-in before any of this applies to them. A sequence can also call your own systems on the way: what a webhook step posts, and what it never carries.