Email is still one of the most essential communication tools for businesses of all sizes. Whether you’re reaching out to customers, sending internal updates, or delivering transactional information—email is critical. But what happens when your carefully crafted message ends up in the dreaded spam folder?
At ROC, we’ve seen how poor email deliverability can damage business operations—from miscommunications with clients to missed sales opportunities. After helping several clients troubleshoot email issues, we’ve developed a checklist to help business professionals improve their email deliverability and overall email infrastructure.
What Is Email Deliverability — And Why Should Businesses Care?
Email deliverability is the ability of your emails to successfully reach your recipients’ inbox, rather than being filtered out, bounced, or sent to spam.
Poor deliverability impacts:
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Customer relationships – Missed emails lead to missed connections.
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Brand reputation – Getting flagged as spam is not a good look.
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Revenue – Promotions or transactional messages not reaching inboxes = lost sales.
Even though ROC primarily focuses on physical and digital network infrastructure, email is very much a part of the larger communication system, and if it’s not working reliably, your organization’s efficiency suffers.
Why Emails Don’t Reach the Inbox: Common Causes
Over the years, we’ve identified these common culprits:
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Poor Sender Reputation
Your sending domain or IP address has been flagged previously (due to spam reports, high bounce rates). -
Lack of Authentication
Not configuring SPF, DKIM, and DMARC records signals red flags to email providers. -
Low-Quality Email Lists
Purchased lists or outdated CRM contacts lead to high bounce or unengaged rates. -
Spam Trigger Words and Formatting
Phrases like “Urgent!!!” or “You won’t believe this deal” are outdated tricks that now scream spam. -
No Engagement Signals
Low open/click-through rates tell inbox providers people don’t want your emails.
9 Proven Ways to Improve Email Deliverability
At ROC, we often advise clients to integrate email best practices into their network strategies, especially when building infrastructure that supports digital marketing and communications efforts. Here are the top strategies we recommend:
1. Use a Custom Domain for Sending
Avoid free addresses like Gmail or Yahoo for business communications. Set up a custom domain (e.g., @yourcompany.com) to build brand credibility and authentication trust.
2. Authenticate Your Emails (SPF, DKIM, DMARC)
Think of these as digital security guards validating your emails:
- SPF (Sender Policy Framework): Tells recipient servers that your email is allowed to come from your IP.
- DKIM: Validates your message wasn’t altered after sending.
- DMARC: Helps receivers decide what to do with unauthenticated messages.
Configuring these in your domain’s DNS record is critical, and if you’re not sure how, our team at ROC can help.
3. Clean Your Email List Regularly
Remove unengaged, invalid, or bounced addresses from your list. High bounce rates hurt your sender score.
4. Run Email Deliverability Tests
Use tools like Mail Tester, GlockApps, or Postmark to see if your emails are marked as spam and why.
5. Personalize and Segment Your Messages
Targeted, relevant content improves open rates—and shows ISPs that people want your emails.
6. Avoid Spammy Content and Formatting
Stay away from:
- All caps
- Too many exclamation marks!!!
- Misleading subject lines
- Too many images relative to text
7. Monitor Engagement Metrics
High open and click-through rates = good deliverability. Use A/B testing and subject line optimization to improve.
8. Set Up a Double Opt-In Process
This improves list quality and ensures new subscribers genuinely want your content.
9. Consider a Dedicated IP (For High-Volume Senders)
If you send lots of emails, a dedicated IP protects your reputation from other senders—especially if using shared services like Mailchimp, SendGrid, or AWS SES.
A Real-World Example From the Field
One of our business clients was facing low response rates from their customers, especially for support and billing emails. Despite using a well-known mass email platform, many of their emails were being marked as spam.
We conducted a network and infrastructure audit, discovered missing SPF and DMARC records, and found that their domain wasn’t set up for proper email authentication. After walking them through a fix and helping them clean their email lists, they saw open rates jump by 42% within a month.
It just goes to show: it’s not always about switching platforms. Sometimes, it’s your configuration that’s standing between you and a solid connection with your audience.
Final Thoughts
Strong Infrastructure = Reliable Communication
Email — just like your fiber, cabling, and network setup — must be built correctly from the ground up to be reliable.
At ROC, we specialize in creating an integrated technology ecosystem—from your physical network infrastructure to the digital communications riding on top of it. If you’re struggling with email deliverability—or just want to monitor and improve your system—we’re happy to consult and help you build a more dependable communications backbone.
Want Help with Your Email Setup?
Contact Us today for a no-obligation consult on your communication infrastructure, including network and digital system performance audits.
Get in touch with us now:
📧 Please feel free to email us at support@rocomaha.com
đź“ž Please feel free to contact us at (402) 957-1112
FAQs:
Email deliverability refers to the ability of your email to successfully reach your recipient’s inbox instead of being flagged as spam or bouncing. It matters because low deliverability means your emails are not seen, leading to poor marketing performance, lost revenue, reduced engagement, and potential damage to your business’s credibility.
Several factors influence email deliverability, including your sending domain’s reputation, proper email authentication (SPF, DKIM, DMARC), the quality of your email list, the content you send, and how recipients interact with your emails (i.e., opens, clicks, spam reports).
You can use tools such as Mail Tester, GlockApps, or MXToolbox to simulate deliveries and check if your emails are landing in spam. These tools also analyze your email headers, authentication setup, and content to point out issues.
These are email authentication protocols that prove you are a legitimate sender:
- SPF (Sender Policy Framework): Authorizes your server to send mail on your domain’s behalf.
- DKIM (DomainKeys Identified Mail): Adds a digital signature to emails to verify they weren’t altered in transit.
- DMARC (Domain-based Message Authentication, Reporting & Conformance): Provides instructions to recipient servers on how to handle unauthenticated mail.
Having these in place boosts your sender reputation and reduces the chance of your emails being spoofed or marked as spam.
It’s best to clean your email list at least once every 3–6 months. Remove bounced, unengaged, or outdated addresses to maintain high deliverability rates and prevent spam traps or blacklisting.
Yes! While ROC specializes in communications infrastructure, we often assist in optimizing digital channels like email by ensuring proper authentication, secure DNS configurations, and integrated communication systems. Contact us to learn how we can help align your digital and network infrastructure for better results.
