> ## Documentation Index
> Fetch the complete documentation index at: https://docs.cliqo.io/llms.txt
> Use this file to discover all available pages before exploring further.

# How to schedule and set the send pacing

> Send now, schedule for later, and spread the send over hours — when to use each mode.

## What you will learn

The campaign delivery modes and how send pacing protects your reputation on large lists.

## Send now or schedule

On the **Delivery** tab:

* **Send now** — when you confirm on **Review**, the campaign is queued and goes out shortly (the badge shows *Queued* until the send starts).
* **Schedule** — pick a date and time; the campaign shows as *Scheduled* and fires on its own at that time.
* **Smart send** — shows as *Coming soon*; it isn't available yet.

## Send pacing

Pacing spreads the send over a window instead of releasing everything in the same minute:

| Option | How it goes out |
| - | - |
| **Instant** | All at once |
| **1 hour · 4 hours · 8 hours · 24 hours** | Spread evenly across the window |

**When to use it**: large lists, or a base still in [warmup](https://docs.cliqo.io/en/entregabilidade/aquecimento.md). Sudden volume spikes are one of the classic triggers for blocks at mailbox providers — spreading the same volume over a few hours delivers the same result without the spike.

Two behaviors worth knowing:

* **Pacing is self-correcting.** If one slice falls behind, the next one compensates — the campaign finishes within the chosen window, with nothing left over.
* **No one receives twice.** Duplicate protection is per recipient, independent of how the send is sliced.

## While the send is running

The campaign report follows along live ("Sending…") and **you can close the screen — sending continues on the server**. If a send is interrupted midway, it resumes automatically from where it stopped ("Resuming automatically…"), and no one receives it twice. If the resume stops progressing for more than 10 minutes — or if the send fails —, the report shows the **Resume sending** button, which opens campaign setup with **Resume pending recipients**: it sends only to the pending recipients.

## Related articles

* [Warmup: how to send to a new base](https://docs.cliqo.io/en/entregabilidade/aquecimento.md)
* [How to read the campaign report](https://docs.cliqo.io/en/campanhas/ler-o-relatorio.md)


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