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

# Update Email

> Update a scheduled email.

export const ResendParamField = ({children, body, path, ...props}) => {
  const [lang, setLang] = useState(() => {
    return localStorage.getItem('code') || '"Node.js"';
  });
  useEffect(() => {
    const onStorage = event => {
      const key = event.detail.key;
      if (key === 'code') {
        setLang(event.detail.value);
      }
    };
    document.addEventListener('mintlify-localstorage', onStorage);
    return () => {
      document.removeEventListener('mintlify-localstorage', onStorage);
    };
  }, []);
  const toCamelCase = str => typeof str === 'string' ? str.replace(/[_-](\w)/g, (_, c) => c.toUpperCase()) : str;
  const resolvedBody = useMemo(() => {
    const value = JSON.parse(lang);
    return value === 'Node.js' ? toCamelCase(body) : body;
  }, [body, lang]);
  const resolvedPath = useMemo(() => {
    const value = JSON.parse(lang);
    return value === 'Node.js' ? toCamelCase(path) : path;
  }, [path, lang]);
  return <ParamField body={resolvedBody} path={resolvedPath} {...props}>
      {children}
    </ParamField>;
};

## Path Parameters

<ParamField path="id" type="string" required>
  The Email ID.
</ParamField>

## Body Parameters

<ResendParamField body="scheduled_at" type="string">
  Schedule email to be sent later. The date should be in ISO 8601 format (e.g:
  2026-08-05T11:52:01.858Z).
</ResendParamField>

<RequestExample>
  ```ts Node.js theme={"theme":{"light":"github-light","dark":"vesper"}}
  import { Resend } from 'resend';

  const resend = new Resend('re_xxxxxxxxx');

  const oneMinuteFromNow = new Date(Date.now() + 1000 * 60).toISOString();

  const { data, error } = await resend.emails.update({
    id: '49a3999c-0ce1-4ea6-ab68-afcd6dc2e794',
    scheduledAt: oneMinuteFromNow,
  });
  ```

  ```php PHP theme={"theme":{"light":"github-light","dark":"vesper"}}
  $resend = Resend::client('re_xxxxxxxxx');

  $oneMinuteFromNow = (new DateTime())->modify('+1 minute')->format(DateTime::ISO8601);

  $resend->emails->update('49a3999c-0ce1-4ea6-ab68-afcd6dc2e794', [
    'scheduled_at' => $oneMinuteFromNow
  ]);
  ```

  ```python Python theme={"theme":{"light":"github-light","dark":"vesper"}}
  import resend
  from datetime import datetime, timedelta

  resend.api_key = "re_xxxxxxxxx"

  one_minute_from_now = (datetime.now() + timedelta(minutes=1)).isoformat()

  update_params: resend.Emails.UpdateParams = {
    "id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794",
    "scheduled_at": one_minute_from_now
  }

  resend.Emails.update(params=update_params)
  ```

  ```ruby Ruby theme={"theme":{"light":"github-light","dark":"vesper"}}
  require "resend"

  Resend.api_key = "re_xxxxxxxxx"

  one_minute_from_now = (Time.now + 1 * 60).strftime("%Y-%m-%dT%H:%M:%S.%L%z")

  update_params = {
    "email_id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794",
    "scheduled_at": one_minute_from_now
  }

  Resend::Emails.update(update_params)
  ```

  ```go Go theme={"theme":{"light":"github-light","dark":"vesper"}}
  package main

  import (
  	"time"

  	"github.com/resend/resend-go/v3"
  )

  func main() {
  	client := resend.NewClient("re_xxxxxxxxx")

  	oneMinuteFromNow := time.Now().Add(time.Minute * time.Duration(1))
  	oneMinuteFromNowIso := oneMinuteFromNow.Format("2006-01-02T15:04:05-0700")

  	updateParams := &resend.UpdateEmailRequest{
  		Id:          "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794",
  		ScheduledAt: oneMinuteFromNowIso,
  	}

  	client.Emails.Update(updateParams)
  }
  ```

  ```rust Rust theme={"theme":{"light":"github-light","dark":"vesper"}}
  use chrono::{Local, TimeDelta};
  use resend_rs::types::UpdateEmailOptions;
  use resend_rs::{Resend, Result};

  #[tokio::main]
  async fn main() -> Result<()> {
    let resend = Resend::new("re_xxxxxxxxx");

    let one_minute_from_now = Local::now()
      .checked_add_signed(TimeDelta::minutes(1))
      .unwrap()
      .to_rfc3339();

    let update = UpdateEmailOptions::new()
      .with_scheduled_at(&one_minute_from_now);

    let _email = resend
      .emails
      .update("49a3999c-0ce1-4ea6-ab68-afcd6dc2e794", update)
      .await?;

    Ok(())
  }
  ```

  ```java Java theme={"theme":{"light":"github-light","dark":"vesper"}}
  import com.resend.*;

  public class Main {
      public static void main(String[] args) {
          Resend resend = new Resend("re_xxxxxxxxx");

          String oneMinuteFromNow = Instant
            .now()
            .plus(1, ChronoUnit.MINUTES)
            .toString();

          UpdateEmailOptions updateParams = UpdateEmailOptions.builder()
                  .scheduledAt(oneMinuteFromNow)
                  .build();

          UpdateEmailResponse data = resend.emails().update("49a3999c-0ce1-4ea6-ab68-afcd6dc2e794", updateParams);
      }
  }
  ```

  ```csharp .NET theme={"theme":{"light":"github-light","dark":"vesper"}}
  using Resend;

  IResend resend = ResendClient.Create( "re_xxxxxxxxx" ); // Or from DI

  await resend.EmailRescheduleAsync(
      new Guid( "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794" ),
      DateTime.UtcNow.AddMinutes( 1 ) );
  ```

  ```bash cURL theme={"theme":{"light":"github-light","dark":"vesper"}}
  curl -X PATCH 'https://api.resend.com/emails/49a3999c-0ce1-4ea6-ab68-afcd6dc2e794' \
       -H 'Authorization: Bearer re_xxxxxxxxx' \
       -H 'Content-Type: application/json' \
       -d $'{
    "scheduled_at": "2026-08-05T11:52:01.858Z"
  }'
  ```

  ```bash CLI theme={"theme":{"light":"github-light","dark":"vesper"}}
  resend emails update 49a3999c-0ce1-4ea6-ab68-afcd6dc2e794 \
    --scheduled-at "2026-08-05T11:52:01.858Z"
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={"theme":{"light":"github-light","dark":"vesper"}}
  {
    "object": "email",
    "id": "49a3999c-0ce1-4ea6-ab68-afcd6dc2e794"
  }
  ```
</ResponseExample>