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

# Scheduling and sending

> Send now, schedule for later, or optimize send time per recipient

The **Schedule** stage is the last step before a campaign goes out.

## Options

<CardGroup cols={2}>
  <Card title="Send now" icon="paper-plane">
    Sending begins immediately and is distributed across a short window rather than fired all at once.
  </Card>

  <Card title="Schedule" icon="calendar">
    Pick a date and time. Delivery is spread across roughly a two hour window around it.
  </Card>
</CardGroup>

Sends are always distributed rather than instantaneous. A sudden spike of identical mail hurts deliverability.

## Optimal send time

<Info>
  **Beta.** Requires prediction models, which are enabled per brand.
</Info>

Instead of one time for everyone, LTV.ai can place each recipient in whichever of eight three hour slots they are most likely to open in. The campaign is split across those slots over the day.

Use this for large, engagement sensitive sends. Use a fixed time when the timing itself matters, such as a sale opening.

## Before it schedules

LTV.ai checks a few things and will stop or warn you.

| Check                                                  | What happens                                                                            |
| ------------------------------------------------------ | --------------------------------------------------------------------------------------- |
| [Sending domain](/connect/sending-domain) not verified | Blocked until setup completes                                                           |
| Billing not set up                                     | Blocked                                                                                 |
| First ever send                                        | Confirmation required, volume capped                                                    |
| Warm-up in progress                                    | Blocked until the ramp finishes                                                         |
| More than 1.5x your largest previous send              | **Blocked.** Reduce the audience, or send a smaller campaign first to raise the ceiling |
| More than 1.7x your busiest day in the last 30 days    | **Warning only.** Acknowledge it and carry on                                           |

The last two are different limits and behave differently. The volume cap stops you. The capacity check only warns. See [Warm-up and sending limits](/send/warmup-and-limits).

See [Warm-up and sending limits](/send/warmup-and-limits).

## Sending through Klaviyo instead

Everything on this page applies to sending with LTV.ai. If your sending lives in Klaviyo, you can push the campaign there instead and schedule it in Klaviyo. See [Send with LTV.ai or Klaviyo](/send/sending-routes).