How Email Deliverability Works (and Why It’s Critical)

Email deliverability ensures your messages land in inboxes, not spam. Learn how it works and how Taildove automates setup.

What is Deliverability?

In simple terms, email deliverability is the measure of how many of your sent emails actually reach your subscribers' inboxes. It’s important to distinguish this from "delivery rate." An email might be "delivered" to a server but still end up in the spam folder or be blocked entirely.

At Taildove, we pride ourselves on an industry-leading 98.6% inbox placement rate. This means that when you send with us, your messages aren't just leaving our servers—they're reaching their destination.

Key Factors (SPF, DKIM, DMARC)

Technical authentication is the backbone of deliverability. Think of these as your digital passports:

• SPF (Sender Policy Framework): Specifies which IP addresses and domains are allowed to send email on your behalf.
• DKIM (DomainKeys Identified Mail): Adds a digital signature to your emails, proving they haven't been tampered with in transit.
• DMARC (Domain-based Message Authentication, Reporting, and Conformance): Tells mailbox providers how to handle emails that fail SPF or DKIM checks.

Normally, setting these up requires significant technical expertise. However, Taildove offers auto-configuration, meaning you don't need to be an expert to have professional-grade security.

Common Deliverability Issues

Even with good intention, your deliverability can suffer due to several factors:

• Spam Traps: Email addresses used by ISPs to identify and blacklist senders who use poor list-building practices.
• Blacklists: Databases of domains and IPs known for sending spam.
• Poor Content: Using "spammy" words, too many images, or misleading subject lines can trigger filters.
• A/B Testing Fails: Sending inconsistent volumes or drastically different content can sometimes confuse ISP filters.

How Taildove Improves Deliverability

We don't just send your emails; we protect your reputation.

• Auto Domain Health Monitoring: We actively alert you to any issues with your domain health before they impact your sending.
• Dedicated IP Options: For high-volume senders on our Business plan, we offer dedicated IPs to ensure you have full control over your reputation.
• Bounce Suppression & List Cleaning: We automatically prune hard bounces and provide tools to keep your list pristine.

Best Practices

To maintain a high inbox rate, you should also follow these engagement-focused practices:

1. List Hygiene: Always use double opt-in to ensure your subscribers truly want to hear from you.
2. Segmentation: Tailor your content to specific segments of your audience. Higher engagement (opens and clicks) signals to ISPs that your content is valuable.
3. Personalisation: Beyond just using a name, personalise content based on user behaviour and preferences.

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Check Your Score
Use our free Deliverability Tool to see how your current emails are performing. Get started for free with Taildove today.