Guides
How to Get Instant Results from Email Deliverability Software
Author :
MailMend Team
January 13, 2026
Your Black Friday campaign is ready. Your segments are dialed in. But when 30% of your emails land in Gmail's Promotions tab instead of the Primary inbox, you're leaving significant revenue on the table. For e-commerce brands using Klaviyo, the difference between Promotions and Primary placement can mean a significant increase in email revenue—and the right deliverability software can make that shift happen on Day 1.
Key Takeaways
Fixing authentication and cleaning bounces can significantly improve inbox placement by demonstrating positive sender behavior to inbox providers
SPF, DKIM, and DMARC setup is a foundational step that prevents domain spoofing, a common reason for spam folder placement
Gmail and Yahoo now block unauthenticated senders, making authentication non-negotiable
Bounce rates exceeding 2% indicate list hygiene problems requiring immediate attention
Spam complaint rates above 0.1% risk Gmail and Yahoo blocking your domain entirely
Brands with optimized deliverability make an average of $36-$45 per dollar spent on email marketing
Understanding the Promotions Tab Problem for E-commerce Emails
Gmail's tabbed inbox system automatically sorts incoming emails into Primary, Social, Promotions, and Updates categories. For e-commerce brands, this creates a fundamental challenge: your marketing emails almost always land in Promotions, where they compete for attention alongside dozens of other brand messages.
Why Your E-commerce Emails Are Missing the Primary Inbox
Gmail's categorization algorithm analyzes multiple signals to determine inbox placement:
Sender patterns: High-volume promotional sending triggers Promotions placement
Content signals: Discount language, product images, and promotional CTAs flag emails as marketing
Historical behavior: If recipients previously received promotional content from your domain, new emails follow the same path
Technical markers: Certain tracking pixels, link structures, and HTML formatting indicate promotional intent
The challenge is that e-commerce email best practices often directly conflict with Primary inbox signals. Product images, sale announcements, and clear CTAs are essential for conversions—but they're exactly what Gmail's algorithm looks for when routing emails to Promotions.
The Hidden Cost of Promotions Tab Placement
Primary inbox emails receive significantly higher visibility and engagement than Promotions tab messages. When emails land in Primary, they:
Appear at the top of recipients' inboxes alongside personal correspondence
Generate push notifications on mobile devices
Get read immediately rather than batch-processed during "promotional email time"
For brands sending to large lists, even small improvements in placement translate to substantial revenue differences. A 15% improvement in Primary inbox placement across 100,000 subscribers can mean thousands of additional email opens and hundreds of extra conversions per campaign.
Identifying Common Email Deliverability Issues
Before implementing any deliverability software, diagnose your current state:
Authentication gaps: Missing or misconfigured SPF, DKIM, or DMARC records cause immediate deliverability problems. Gmail and Yahoo's 2024 sender requirements mandate proper authentication for bulk senders.
List hygiene problems: Bounce rates above 2% damage sender reputation and signal poor list management to inbox providers.
Engagement decay: Inactive subscribers who never open emails drag down your overall engagement metrics, which inbox providers use to determine placement.
Content triggers: Excessive exclamation points, spam trigger words, poor text-to-image ratios, and broken links all increase spam scores.
The Mailmend Solution: Algorithmic Inbox Placement Without Content Changes
Traditional deliverability consulting requires weeks of content strategy changes, domain warming, and technical overhauls. Mailmend takes a fundamentally different approach: proprietary algorithmic technology that moves e-commerce emails from Promotions to Primary without touching your content, copy, or technical infrastructure.
How Mailmend's AI Bypasses the Promotions Tab
Mailmend's technology operates through a three-step process:
Placement analysis: Your emails are sent to a rotating set of test inboxes to determine current categorization patterns
Threshold calculation: Proprietary AI analyzes the "promotional threshold"—the combined factors Gmail's algorithms use to categorize your specific emails
Custom code generation: Account-specific code is generated that counteracts promotional categorization signals for your Klaviyo account
The result is a drag-and-drop code snippet that embeds into your Klaviyo email templates. No content modifications. No copywriting adjustments. No complex technical configurations.
Integrating Mailmend Seamlessly with Klaviyo
Mailmend's technology is purpose-built for Klaviyo's infrastructure, providing deep integration with:
Template system: Code embeds directly into existing Klaviyo email templates
A/B testing: Native split testing measures exact performance lift from Primary placement
Analytics platform: Results visible within Klaviyo's standard reporting dashboard
API integration: Automatic synchronization with your existing Klaviyo workflows
Setup completes in under 5 minutes through drag-and-drop implementation—a stark contrast to traditional deliverability solutions requiring weeks of technical work.
Achieving Day 1 Revenue Impact with Improved Email Deliverability
The most compelling aspect of modern deliverability software is speed to results. While traditional approaches require gradual domain warming and reputation building, algorithmic inbox placement delivers immediate performance improvements.
Measuring Immediate Email Marketing ROI
Track these metrics to validate deliverability improvements:
Open rate lift: Direct indicator of improved inbox placement
Click-through rate changes: Higher engagement from Primary inbox visibility
Revenue per email: Ultimate measure of campaign effectiveness
Spam complaint rate: Should remain below 0.1% for healthy sender reputation
E-commerce brands using deliverability software can see significant inbox placement improvements when combining authentication fixes with list cleaning and placement optimization.
Case Studies: From Promotions to Profits in 24 Hours
Documented results from brands using algorithmic inbox placement technology demonstrate the revenue impact of Primary inbox delivery. View detailed case studies showing:
Dr. Squatch: Increased their email revenue by 112% escaping the promotions tab. In just 24 hours, Dr. Squatch ran a test to see how Mailmend was performing. Little did they know they were missing out on half the revenue they deserved. 42% increase in open rates and 67% increase in CTR.
StickerYou: "Day 1 boost of 20% - 100% Increase by month 1." StickerYou was absolutely blown away by the results of Mailmend. After going through our videos and speaking to our team, they signed up. 64% increase in open rates and 43% increase in CTR.
Ministry of Supply: "Results within a business day!" Although skeptical at first Ministry Of Supply was able to quickly get setup with Mailmend in a matter of business days and land in the inbox! 27% increase in open rates and 30% increase in CTR.
Larsson & Jennings: Saved our black friday. Anna was suffering from low open rates & click rates after they had a data failure in their ESP. They also had massive promotions tab issues. We came in and fixed ALL of it. 82% increase in open rates and 51% increase in CTR.
Amberjack: "It Actually Worked." Blake was looking for more incremental revenue after they noticed click rates take a dive. They ran some tests with Mailmend and instantly saw revenue shoot up. 54% increase in open rates and 51% increase in CTR.
Clevr Blends: Made a big Difference. Clevr Blends was looking for an easy way to boost their email revenue after seeing low opens and clicks - so they came to Mailmend and saw amazing results. 21% increase in open rates and 63% increase in CTR.
Why Speed Matters for Deliverability Software
Seasonal e-commerce operates on tight timelines. Black Friday preparation, product launches, and flash sales can't wait for months of gradual deliverability improvement. The ability to implement a solution and see results within 24 hours means:
Immediate A/B testing: Measure exact lift from Primary placement vs. Promotions
Campaign-level optimization: Improve specific high-value sends rather than entire domain reputation
Faster ROI: Revenue impact begins immediately rather than after extended warmup periods
The Zero Changes Advantage: Why Mailmend Stands Apart
Traditional deliverability consulting typically requires comprehensive email strategy overhauls:
Rewriting subject lines to avoid spam triggers
Reducing promotional language in email copy
Adjusting image-to-text ratios
Modifying send frequency and timing
Implementing complex segmentation strategies
These approaches work—eventually. But they require marketing teams to compromise on conversion-optimized content while waiting months for sender reputation improvements.
Differentiating from Traditional Deliverability Consulting
Mailmend's "zero changes" approach means:
Keep your proven subject lines: No need to sacrifice open rates by removing urgency language
Maintain your visual branding: Product images and promotional banners stay intact
Preserve your CTAs: Clear calls-to-action that drive conversions remain unchanged
Continue aggressive send frequencies: Support high-volume seasonal campaigns without deliverability penalties
This preserves the marketing elements that drive conversions while solving the underlying placement problem through technical means.
Streamlined Implementation: Less Than 5 Minutes for Setup
The implementation process requires:
Demo call: Qualify for trial access with decision-makers present
Deliverability analysis: Mailmend's team analyzes your current placement issues
Code implementation: Custom code is added to your Klaviyo account
A/B testing activation: Immediate testing through Klaviyo's native functionality
Compare this to traditional deliverability projects requiring extensive initial configuration, plus weeks of ongoing adjustments.
Leveraging Klaviyo's Native A/B Testing for Proof of Performance
Mailmend enables split testing within Klaviyo to measure exact performance differences:
Variant A: Emails with Mailmend code (targeting Primary inbox)
Variant B: Standard emails (landing in Promotions tab)
This direct comparison provides immediate validation of performance lift within your existing analytics dashboard—no additional tracking tools required.
Targeting High-Revenue E-commerce Brands: Who Benefits Most?
Not every brand needs advanced deliverability software. The technology delivers maximum value for specific use cases.
Identifying Your Brand's Fit for Advanced Deliverability Solutions
Ideal candidates for algorithmic inbox placement:
Seven-to-eight-figure e-commerce brands: High email volume where placement improvements translate to significant revenue
Klaviyo users: Deep platform integration enables seamless implementation
Aggressive promotional senders: Brands with frequent campaigns and promotional content
Declining engagement metrics: Open rates dropping without clear cause
Product categories seeing strong results:
Personal care and beauty
Apparel and fashion
Home goods and kitchenware
Food and beverage
Lifestyle accessories
Solutions for Seasonal Sales and Retention Marketing
Deliverability software provides critical support during:
Black Friday/Cyber Monday preparation: Ensure peak season emails reach Primary inboxes
New product launches: Maximum visibility for announcement campaigns
Flash sales and limited offers: Time-sensitive promotions need immediate engagement
Retention marketing: Re-engagement campaigns targeting existing customers
For brands where email marketing ROI directly impacts profitability, Primary inbox placement becomes a competitive advantage.
A Partnership Model Focused on Your Success: Mailmend's Guarantees
Mailmend operates on a partnership model where customer success directly correlates with their business model. This alignment of incentives differentiates from traditional agency relationships where deliverability consultants charge hourly regardless of results.
Understanding Mailmend's Performance-Based Approach
Key elements of the partnership model:
Revenue satisfaction guarantees: Performance commitments tied to measurable results
1-to-1 client relationships: Dedicated representatives for each account
White-glove onboarding: Hands-on implementation rather than self-service setup
Ongoing optimization: Continuous monitoring and adjustment
The Value of Dedicated Client Support in Deliverability
Deliverability problems rarely have simple solutions. Having dedicated support means:
Rapid troubleshooting: When issues arise, you have direct access to experts who understand your specific account
Proactive monitoring: Potential problems identified before they impact campaign performance
Strategic guidance: Recommendations for maximizing inbox placement during critical periods
Verifying Performance: A/B Testing and Case Studies from Leading Brands
Trust in deliverability software comes from measurable results. Mailmend's integration with Klaviyo's A/B testing infrastructure provides direct performance validation.
How Dr. Squatch Achieved a 112% Email Revenue Increase
The personal care brand Dr. Squatch implemented Mailmend and measured results within 24 hours:
112% email revenue increase: More than doubled email-attributed sales
42% open rate improvement: Significantly higher email visibility
67% click-through rate increase: More engaged recipients taking action
These results came without changes to email content, subject lines, or sending strategy—purely through improved inbox placement.
Measuring Email Performance Lift with Mailmend
Additional brand results documented through case studies:
StickerYou: 64% open rate increase and 43% CTR increase, with initial Day 1 boost of 20% growing to 100% increase by month one
Ministry of Supply: 27% open rate increase and 30% CTR increase within one business day
Clevr Blends: 21% open rate increase and 63% CTR increase
Amberjack: 54% open rate increase and 51% CTR increase
Larsson & Jennings: 82% open rate increase and 51% CTR increase
Trusting the Results: Data from Successful E-commerce Companies
What makes these results credible:
Measurable within Klaviyo: Results visible in brands' existing analytics dashboards
A/B tested methodology: Direct comparison between Mailmend-enabled and standard emails
Named brand testimonials: Video testimonials from executives at recognized companies including Sand Cloud and Caraway Home
Mailmend Integrations and the E-commerce Ecosystem
Mailmend's exclusive focus on Klaviyo enables deep integration that generic deliverability tools can't match.
Why Klaviyo Is Central to Mailmend's Technology
Klaviyo dominates as the email platform for e-commerce. This market position makes it the natural platform for specialized deliverability solutions:
Native A/B testing: Built-in split testing validates performance lift
Template system access: Code embeds directly into email templates
Real-time analytics: Results appear in existing reporting workflows
E-commerce integrations: Klaviyo's connections with Shopify, WooCommerce, and BigCommerce extend throughout the ecosystem
Expanding Reach Through Agency Partnerships
Mailmend has established an agency partnership program enabling email marketing agencies to offer enhanced deliverability to their client base:
Client deliverability improvement: Help agency clients achieve better inbox placement
Measurable results: Demonstrate value through documented performance lift
Partnership opportunities: Revenue sharing arrangements for qualified agencies
Why Mailmend Is Your Best Option for Instant Deliverability Results
For e-commerce brands using Klaviyo, Mailmend offers the fastest path from Promotions tab to Primary inbox. Unlike traditional deliverability solutions requiring content changes or complex technical implementations, Mailmend's algorithmic approach delivers results on Day 1.
What sets Mailmend apart:
Proprietary AI technology: Analyzes promotional threshold factors and generates custom code specifically calibrated for your Klaviyo account
Zero content changes required: Keep your proven subject lines, product images, and promotional CTAs
5-minute implementation: Drag-and-drop code snippet integrates directly with Klaviyo templates
Immediate A/B testing: Measure exact performance lift within Klaviyo's native functionality
Revenue satisfaction guarantees: Partnership model aligned with your success
Proven results from 500+ e-commerce businesses:
Significant email revenue increases
Results visible within 24 hours
Named testimonials from brands like Dr. Squatch, Sand Cloud, and Caraway Home
The platform serves seven-to-eight-figure e-commerce brands across personal care, apparel, home goods, food & beverage, and lifestyle accessories. If your Klaviyo campaigns are landing in Promotions instead of Primary—and it's costing you revenue—contact Mailmend to see what algorithmic inbox placement can do for your brand.
Frequently Asked Questions
What is the Promotions tab and why does it matter for e-commerce emails?
Gmail's Promotions tab is a separate inbox folder where marketing and promotional emails are automatically sorted. Emails in Promotions receive significantly lower visibility than Primary inbox messages—no push notifications, buried below personal emails, and often batch-processed by recipients. For e-commerce brands, this placement directly reduces open rates, click-through rates, and email-attributed revenue.
How does Mailmend's technology work without requiring changes to email content?
Mailmend uses proprietary AI to analyze Gmail's "promotional threshold"—the combined signals that trigger Promotions placement. Rather than modifying your content to avoid these signals (which would hurt conversions), Mailmend generates custom code that counteracts promotional categorization at the technical level. The code embeds into Klaviyo templates through drag-and-drop implementation, preserving your proven marketing content while improving inbox placement.
What kind of results can I expect from using email deliverability software like Mailmend?
Brands implementing Mailmend typically see significant email revenue increases through improved inbox placement. Documented results include 112% revenue increase (Dr. Squatch), 82% open rate improvement (Larsson & Jennings), and 67% CTR increase (Dr. Squatch). Results appear within 24 hours and can be directly measured through Klaviyo's native A/B testing functionality.
Is Mailmend compatible with email service providers besides Klaviyo?
Currently, Mailmend integrates exclusively with Klaviyo. This focused approach enables deep integration with Klaviyo's template system, A/B testing infrastructure, and analytics platform. The technology is purpose-built for Klaviyo's architecture, which is the dominant ESP platform for e-commerce brands.
How quickly can I implement Mailmend and start seeing results?
Implementation completes in under 5 minutes through drag-and-drop code integration with Klaviyo. Results are visible on Day 1, with documented case studies showing significant lift within 24 hours. The process requires booking a demo call with decision-makers present, after which Mailmend's team analyzes your deliverability issues and implements custom code into your account.
