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Overview

Broadcasts let you send marketing emails — newsletters, announcements, product updates, and campaigns — to your contact audiences. Unlike transactional emails, broadcasts are unlimited on all plans. Your plan’s contact limit determines your audience size, not how many broadcasts you can send.
Broadcasts are unlimited. Your plan determines how many contacts you can have — you can send unlimited broadcasts to those contacts.

How It Works

  1. Create a broadcast from the dashboard or API
  2. Design your email using the visual editor or raw HTML
  3. Select your target audience
  4. Send immediately or schedule for later
  5. Track opens, clicks, bounces, and unsubscribes in real time

Creating a Broadcast

Broadcasts
  1. Go to Broadcasts in the sidebar
  2. Click Create Broadcast
  3. Enter a name, subject line, and sender address
  4. Choose your audience
  5. Design your email content
  6. Click Send or Schedule

HTML Editor

Unosend provides two editing modes:
Editor

Template Variables

Templates
Personalize broadcasts with dynamic variables. These are replaced with each contact’s data at send time:
VariableDescriptionExample Output
{{first_name}}Contact’s first nameAlice
{{last_name}}Contact’s last nameSmith
{{email}}Contact’s email addressalice@example.com
{{unsubscribe_url}}One-click unsubscribe linkhttps://unosend.co/unsubscribe/...

Example

<h1>Hey {{first_name}}!</h1>
<p>We have exciting news to share with you.</p>
<p>
  <a href="{{unsubscribe_url}}">Unsubscribe</a>
</p>
Always include {{unsubscribe_url}} in your broadcast emails. This is required for CAN-SPAM and GDPR compliance.

Unsubscribe Handling

Unosend automatically generates a signed unsubscribe URL for each recipient. When clicked:
  1. The contact is marked as unsubscribed in your audience
  2. They won’t receive future broadcasts
  3. A List-Unsubscribe header is included for one-click unsubscribe in email clients
You don’t need to build any unsubscribe infrastructure — just add the {{unsubscribe_url}} variable to your template.

Scheduling

Schedule broadcasts for optimal delivery times:
  1. In the broadcast editor, click Schedule instead of Send
  2. Pick a date and time
  3. The broadcast will be queued and sent automatically
Schedule broadcasts for Tuesday–Thursday mornings (9–11 AM in your audience’s timezone) for the best open rates.

Sending Speed

Broadcasts are processed by parallel workers for fast delivery:
Audience SizeApproximate Time
1,000~10 seconds
10,000~2 minutes
100,000~20 minutes
1,000,000~3 hours
ISP-specific traffic shaping ensures deliverability:
  • Gmail: 120 emails/min, TLS required
  • Outlook: 80 emails/min, TLS required
  • Yahoo: 30 emails/min
  • Other providers: 100 emails/min

Audiences & Targeting

Audience
Each broadcast is sent to a specific audience (contact list). Create audiences for different segments:
  • Newsletter Subscribers — weekly digest recipients
  • Product Updates — feature announcement list
  • Customers — paying customer communications

Audiences Guide

Learn how to create and manage audiences

Analytics

After sending, track performance in real time:
Analytics
MetricDescription
DeliveredSuccessfully delivered to inbox
OpenedRecipient opened the email
ClickedRecipient clicked a link
BouncedEmail bounced (hard or soft)
UnsubscribedRecipient unsubscribed
Open and click tracking is automatic when enabled in your domain settings.

Best Practices

Keep subject lines under 50 characters. Use personalization: ”, your weekly update is here” outperforms generic subjects by 26%.
Don’t blast everyone. Create separate audiences for different interests. Targeted campaigns have 3x higher click rates.
Always send a test email to yourself first. Check links, images, mobile rendering, and variable replacement.
Keep bounce rates under 5%. High bounce rates can trigger automatic account suspension. Use email validation to clean your list before sending.
Always include an unsubscribe link. Process unsubscribes immediately. This is required by law (CAN-SPAM, GDPR) and improves deliverability.

Contact Limits by Plan

PlanContactsBroadcasts
Free1,000Unlimited
10K2,500Unlimited
25K5,000Unlimited
60K10,000Unlimited
100K25,000Unlimited
200K50,000Unlimited
1M500,000Unlimited
EnterpriseUnlimitedUnlimited