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Campaign performance & analytics

Once a campaign is sent in Sendigram, you can track its performance in the Your campaigns section. Key statistics help you understand how many emails reached inboxes, how subscribers engaged, and where improvements are needed.

1. Delivered

  • Definition: The number of emails that successfully reached recipients' mail servers.
  • Excludes: Hard bounces (invalid emails) and blocked attempts.

Use it to: Measure your deliverability rate: Delivered ÷ Sent × 100

2. Opens

  • Definition: The number (and percentage) of recipients who opened your email.
  • Tracked by: A small invisible tracking pixel in the email.
  • Use it to: Measure subject line and preheader effectiveness.
  • Note: Some privacy settings (e.g., Apple Mail Privacy) may inflate open rates.

3. Clicks

  • Definition: The number (and percentage) of recipients who clicked at least one link in your email.
  • Use it to: Measure content engagement and CTA performance.

Pro Tip: Check Click-to-Open Rate (CTOR): Clicks ÷ Opens × 100

This shows how compelling your content was for those who opened.

4. Unsubscribes

  • Definition: The number of recipients who opted out of your mailing list.
  • Use it to: Understand if your content, frequency, or targeting needs adjustment.
  • Note: Sendigram automatically suppresses unsubscribed contacts — they will not receive future campaigns.

Understanding bounce reasons and bounce rates

Not every email you send will reach its destination. When an email fails to deliver, it is called a bounce. Monitoring and managing bounces in Sendigram helps protect your sender reputation and improve deliverability.

1. What Is a Bounce?

A bounce occurs when a recipient's mail server rejects your email.

  • Hard bounce = permanent failure (e.g., invalid email address).
  • Soft bounce = temporary failure (e.g., inbox full, server timeout).

2. Bounce Rates

  • Definition: The percentage of sent emails that bounced.

Formula: \( \text{Bounced} \div \text{Sent} \times 100 \)

  • Industry benchmark: Keep your total bounce rate below 2%.

3. Common Bounce Reasons

Hard Bounces (permanent failures)

  • Invalid or misspelled email address.
  • Domain does not exist.
  • Recipient email address no longer active.
  • Blocked by recipient server (blacklisted or rejected).

Soft Bounces (temporary failures)

  • Recipient's inbox is full.
  • Mail server temporarily unavailable.
  • Message too large (attachments or heavy HTML).
  • Greylisting (server temporarily defers the message).

4. How Sendigram Handles Bounces

  • Hard bounces: Automatically suppressed so future sends won't retry.
  • Soft bounces: Retried a few times before being marked as failed.
  • Bounce stats are available in Campaign Reports → Bounces with categorized reasons.

5. Best Practices for Reducing Bounce Rates

  • Use Email Checker to validate addresses before sending.
  • Regularly clean inactive and invalid contacts from your lists.
  • Avoid purchased lists — they often contain outdated or fake emails.
  • Warm up new domains/IPs gradually to reduce server rejections.
  • Keep message size reasonable (optimize images, avoid large attachments).

6. Troubleshooting High Bounce Rates

  • If hard bounces are high: Audit your contact acquisition method (are addresses collected properly?).
  • If soft bounces are high: Check email size, sending speed, and domain/IP reputation.
  • Monitor blacklists — being listed can trigger server rejections.
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