Improving Email Deliverability

Email System

Improving Email Deliverability

Understanding Email Deliverability

Email deliverability is the ability to successfully deliver emails to your subscribers' inboxes. Even with proper setup, emails can be filtered as spam or bounced. This guide covers the key factors that affect deliverability and actionable steps to improve your inbox placement.

Authentication Records: The Foundation

Proper authentication is the first and most important factor for deliverability. Email providers (Gmail, Outlook, etc.) use authentication records to verify you are who you claim to be.

• SPF Record: Should be correctly configured and include all your email providers. Publish a strict SPF policy with a -all enforcement (not ~all)
• DKIM Signature: Should be properly signed by Lead Fuel CRM and verified by recipients' mail servers
• DMARC Policy: Set to "reject" for maximum protection and deliverability. This tells ISPs to reject any emails that fail authentication

IP Reputation and Warm-up

If you're using a dedicated IP address for sending, you need to establish a good reputation with mail servers. This is called "warming up" your IP.

• Start with low volume (100-200 emails per day)
• Increase volume gradually over 2-4 weeks
• Monitor bounce and complaint rates daily
• Keep bounce rates below 3% and complaint rates below 0.1%
• Maintain good engagement metrics (open and click rates)
• Avoid sending to inactive or old email lists initially

Tip: Use Lead Fuel CRM's audience segmentation to start with your most engaged subscribers first during IP warm-up. This establishes positive signals with mailbox providers.

List Hygiene: Clean Your Email Lists

A clean email list is essential for deliverability. Sending to invalid, bounced, or spam-trap addresses damages your sender reputation.

• Remove Invalid Addresses: Delete emails that have never been opened or contain obvious errors (typos, no @ symbol)
• Handle Bounces Immediately: Remove hard bounces (permanent delivery failures) right away
• Suppress Complainers: Automatically unsubscribe users who mark your emails as spam
• Re-engagement Campaign: Remove users who haven't engaged in 6+ months, or run a re-engagement email first
• Remove Inactive Users: Consider removing contacts with zero opens in the last 12 months

Important: Removing bounced and inactive addresses may reduce your list size, but it significantly improves deliverability and ROI. ISPs penalize senders with high bounce rates, so smaller, cleaner lists always outperform large, messy ones.

Content and Sending Practices

The content of your emails and how you send them significantly impacts deliverability:

• Avoid Spam Triggers: Don't use excessive caps, multiple exclamation marks, or spam keywords (FREE, BUY NOW, CLICK HERE)
• Optimize Subject Lines: Keep subject lines under 50 characters and avoid misleading claims
• Use Clear From Names: Use your company name or personal name, not generic terms like "Promotions" or "Newsletter"
• Include Unsubscribe Link: Always include a clear, functional unsubscribe link (required by law)
• Use Reply-To Address: Set a monitored reply-to address so recipients can actually reply to you
• Test Before Sending: Use Lead Fuel CRM's spam filter test to identify potential issues before blast sending

Engagement Signals

Modern email providers monitor engagement (opens, clicks) to determine if emails are wanted. Higher engagement improves deliverability:

• Focus on sending relevant, personalized content
• Use Lead Fuel CRM merge fields to personalize subject lines and body text
• Send campaigns when your audience is most engaged (test send times)
• Monitor and analyze open and click rates in your campaign reports
• Remove non-engaged subscribers from future campaigns

Monitoring Your Deliverability

Regularly check your sender reputation and deliverability metrics:

Tip: ISPs evaluate sender reputation on a rolling basis. Even one large, poor-performing campaign can impact your deliverability for weeks. Always test campaigns to a small segment before sending to your full list.

Need more help? Contact Lead Fuel CRM support for personalized assistance.