Loading…
Your Full-Service Digital Agency & AI Strategy Partner
Real strategists. Real AI tools. Real growth. — 1Digital® since 2012
Workspace by 1Digital® — the agency platform we built. Coming to select agencies. Join the early-access list →
Email Marketing
Klaviyo-led email marketing, SPF/DKIM/DMARC deliverability authentication, BIMI brand verification, AI-augmented subject lines and send-time optimization, and post-Mail Privacy Protection (MPP) attribution — managed by 1Digital® since 2012. 14 years. 400+ brands. 941+ verified reviews.
The 1Digital® Difference
Our strategists, designers, developers, and writers are human. The proprietary AI we built makes them faster and sharper — not the other way around.
Trusted by 400+ Brands · Certified Partners
Of results, scale, and quality at the enterprise level.
Specialists across SEO, AI SEO, PPC, design, dev, and strategy.
US core team for clear communication; vetted global specialists for international client work.
Rated 4.9/5 across 941+ verified client reviews.
Email marketing has been disrupted on three fronts since 2021 — and most marketing pages still describe email the way it worked in 2018. (1) Apple Mail Privacy Protection (MPP) launched with iOS 15 (September 2021) and broke open-rate measurement permanently — open rates are now inflated and unreliable as a primary KPI. (2) Gmail and Yahoo’s bulk sender requirements went into effect February 2024 with strict enforcement since November 2025: SPF + DKIM + DMARC are mandatory for any domain sending 5,000+ daily emails to Gmail (Microsoft joined May 2025; Apple too). Non-compliant senders are now actively rejected, not just spam-foldered. (3) AI-augmented email — AI-generated subject lines, send-time optimization, predictive personalization, and prompt-based content generation — has gone from experimental to mainstream production infrastructure.
1Digital® brings 14 years of email marketing execution across 400+ brands and 50+ in-house specialists — calibrated for the 2026 email reality. We deliver Klaviyo-led eCommerce email programs with deliverability authentication baked in, BIMI for inbox brand verification, AI-augmented creative and timing, and post-MPP attribution architecture so revenue measurement remains accurate even as platform privacy changes erode legacy metrics.
1Digital® builds Klaviyo-led email programs that drive 15-30% of total eCommerce revenue for mature programs — combining lifecycle flow architecture, custom HTML creative, conversion-optimized copywriting, deliverability authentication (SPF/DKIM/DMARC mandatory since Gmail/Yahoo February 2024), BIMI brand verification, AI-augmented subject lines and send-time optimization, and post-Apple-MPP attribution architecture.
14 years. 400+ brands. 941+ verified reviews. Klaviyo Partner with deep eCommerce platform fluency across Shopify, BigCommerce, WooCommerce, and Magento/Adobe Commerce.
Specialist page: Klaviyo email marketing — flow architecture, predictive analytics, SMS coordination, server-side Conversion Tracking.
Email marketing still delivers some of the highest ROI in all of digital marketing — but only when programs are calibrated for the 2026 reality. Apple’s Mail Privacy Protection (launched September 2021) made open rates unreliable. Gmail and Yahoo’s bulk sender requirements (February 2024 introduction, November 2025 strict enforcement) made SPF + DKIM + DMARC + one-click unsubscribe + spam complaint rate management non-negotiable. Microsoft joined the same standards in May 2025. Apple aligned. AI-augmented subject lines and send-time optimization moved from experimental to production infrastructure. Brands still running email the way they ran it in 2020 are losing to brands that have wired authentication, AI, and post-MPP attribution into their email programs as core infrastructure.
We focus email marketing on existing leads who have opted in — the most valuable, most warm, most likely-to-convert audience in your entire marketing funnel. When messaging aligns with previous user behavior (browsing, cart-add, purchase, post-purchase, replenishment cycle), email drives clicks, engagements, repeat purchases, and replenishment revenue at unit economics paid channels can’t match. Our targeted email marketing services combine custom-designed HTML templates, brand-aligned imagery, conversion-optimized copywriting, lifecycle flow architecture, AI-augmented creative, and deliverability authentication baked in — so emails reach inboxes (not spam folders) and drive measurable revenue.
We design custom HTML email templates that work across desktop, tablet, and mobile (60-70%+ of email opens are mobile), tested in dark mode, accessible per WCAG 2.2 AA, and optimized for fast rendering across Apple Mail (Apple Mail Privacy Protection considered), Gmail, Outlook, and Yahoo. Templates are reusable across promotional broadcasts, lifecycle flows, transactional emails, and segmented campaigns — with offers, hero images, and copy customizable for ongoing campaign agility.
1Digital® Agency partners with Klaviyo as our preferred email marketing platform — built specifically for eCommerce with native integrations across Shopify, BigCommerce, WooCommerce, and Magento/Adobe Commerce; predictive analytics (customer LTV, next-order date, churn-risk scoring) out of the box; native SMS for cross-channel lifecycle flows; AI-generated subject lines and send-time optimization; dedicated sending infrastructure with built-in SPF/DKIM/DMARC alignment; and BIMI support. Klaviyo’s eCommerce-native data model means lifecycle flows can fire on order events, browsing behavior, replenishment timing, and predictive analytics signals that other ESPs don’t natively understand.
We also partner with Mailchimp, Constant Contact, Omnisend, Sendlane, Iterable, and Braze depending on your stack, complexity, and budget. Mailchimp remains strong for SMB and free-tier programs. Constant Contact serves non-eCommerce B2B well. Omnisend offers Shopify-native pricing competitive with Klaviyo. Sendlane targets DTC. Iterable and Braze serve enterprise multichannel. Our custom HTML templates work seamlessly across all platforms — and our deliverability authentication, BIMI implementation, and post-MPP attribution patterns translate across ESPs.
14 years of eCommerce email marketing execution. 50+ in-house specialists across email strategists, lifecycle flow architects, custom HTML template designers, conversion-optimized copywriters, deliverability authentication engineers, BIMI implementation specialists, AI augmentation operators, and post-MPP attribution analysts. 400+ brands served. 4.9/5 across 941+ verified reviews. Google Partner, Shopify Plus Partner, Elite BigCommerce Partner (BigDev Certified), Klaviyo Partner. We’ve evolved with the field through Apple Mail Privacy Protection rollout (September 2021, iOS 15), Gmail/Yahoo bulk sender requirements introduction (February 2024) and strict enforcement (November 2025), Microsoft joining the same standards (May 2025), Google Postmaster Tools v2 launch (October 2025), and AI-augmented email becoming production infrastructure (2024-2026) — pairing email marketing methodology fluency with deep eCommerce platform fluency and 2026-calibrated deliverability architecture.
From research to rollout — eight pillars covering strategy, segmentation, creative, deliverability, and measurement.
RFM (Recency / Frequency / Monetary) segmentation, predictive customer LTV scoring, predictive next-order date, churn-risk scoring, engagement tier segments. Modern segmentation goes beyond demographics — leveraging behavioral signals to deliver the right message to the right person at the right time. Klaviyo Predictive Analytics, Iterable Brand Affinity, Braze Predictive Suite.
Welcome series, abandoned cart, abandoned browse, abandoned checkout, post-purchase, replenishment, win-back, sunset, VIP, loyalty, birthday, back-in-stock, price drop, cross-sell, upsell. Lifecycle flows typically drive 30-50% of total email revenue with the right architecture in place.
Apple Mail Privacy Protection (iOS 15, September 2021) broke open rates as a primary KPI. We pivot to click rate, click-to-deliveries, revenue per recipient (RPR), revenue per send (RPS), placed-order rate, and Klaviyo Conversion Tracking with server-side event integration for measurement integrity.
Native eCommerce integrations across Shopify, BigCommerce, WooCommerce, Magento/Adobe Commerce, headless architectures. Server-side event integration for revenue attribution. Cross-channel coordination with SMS (Klaviyo SMS, Postscript, Attentive), CRM, customer support tools, and review platforms.
Custom HTML email templates that work across desktop/tablet/mobile (60-70% mobile share), dark-mode tested, accessibility-compliant per WCAG 2.2 AA, fast-rendering across Apple Mail / Gmail / Outlook / Yahoo. Reusable templates for promotional broadcasts, lifecycle flows, transactional, and segmented campaigns.
AI-generated subject lines (Klaviyo AI, Phrasee, Persado, Jacquard), send-time optimization, AI-driven product recommendations, predictive personalization. Augmented — not replaced — by 50+ in-house specialists for brand voice fidelity. AI accelerates execution; specialists guide strategy.
SPF, DKIM, DMARC setup and monitoring (mandatory for Gmail/Yahoo since Feb 2024, strict enforcement Nov 2025; Microsoft May 2025; Apple aligned). DMARC policy progression (p=none → p=quarantine → p=reject). One-click unsubscribe per RFC 8058. Spam complaint rate <0.3% threshold, <0.1% target. Google Postmaster Tools v2 monitoring.
Brand Indicators for Message Identification — verified logos in supporting inboxes (Gmail, Yahoo, Apple Mail). Requires DMARC at p=quarantine or p=reject plus a Verified Mark Certificate (VMC) from Entrust or DigiCert. Lifts open rates 10-39% per industry studies and signals deliverability infrastructure maturity to ISPs.
Sales Focused
Design, layout, and CTAs funnel shoppers and encourage purchasing. Copy mirrors parent website for brand consistency. Highest revenue per send when paired with promotional triggers. Common formats: product launches, sale announcements, abandoned cart recovery.
Community Focused
Generates engagement and a sense of community. Educates subscribers on products, services, brand positions, and social causes. Newsletter style — drives traffic to blog, content hub, or video content. Cross-sell opportunities through soft links to featured or related products.
Announcement Focused
Single strong message — high signal-to-noise ratio. Showcases events, sales, specials, promotions, and featured products or categories. Strong tracking signals for refining strategy and segmentation. Common use: Black Friday / Cyber Monday, BFCM warmup sequences, product launches.
Remarketing / Re-Engagement
Re-engages lapsed customers (60 / 90 / 180 days post-purchase). Personalized messaging based on previous purchases, browsing, and predictive next-order date. Win-back flows plus sunset cleanup protect deliverability and improve list quality. Critical for replenishment-cycle products (consumables, beauty, health, supplements).
Email structure examples
Sales Focused
Community Focused
Announcement Focused
Three pillars defining our email marketing service delivery.
1Digital® offers custom HTML email designs that match your brand voice across desktop, tablet, and mobile (60-70% mobile share). Mockup template design with collaborative iteration. Dark-mode tested. Accessibility-compliant per WCAG 2.2 AA. Optimized for fast rendering in Apple Mail, Gmail, Outlook, and Yahoo with privacy considerations baked in.
HTML/CSS coding for your ESP of choice (Klaviyo, Mailchimp, Constant Contact, Omnisend, Sendlane, Iterable, Braze) with eCommerce platform integration (Shopify, BigCommerce, WooCommerce, Magento/Adobe Commerce, headless). Server-side event integration for post-MPP attribution. SPF/DKIM/DMARC setup. BIMI implementation including Verified Mark Certificate coordination.
Conversion-optimized copywriting from 50+ in-house specialists, augmented by AI-generated subject lines (Klaviyo AI, Phrasee, Persado, Jacquard) and send-time optimization. Brand-voice fidelity preserved by human editorial oversight; AI accelerates testing velocity, idea generation, and personalization at scale.
Email marketing in 2026 is fundamentally different from email marketing in 2020. AI-generated subject lines via Klaviyo AI, Phrasee, Persado, and Jacquard now consistently outperform human-written subject lines on top-performing programs — enabling rapid creative testing at scale. AI-driven send-time optimization in Klaviyo, Iterable, and Braze sends each subscriber’s email at their personally-optimized time of day rather than batch-sending the entire list at once. Predictive analytics (Klaviyo Predictive Analytics, Iterable Brand Affinity, Braze Predictive Suite) score every subscriber on customer LTV, next-order date, and churn risk — letting flows fire on predictive signals rather than reactive triggers. AI-driven product recommendations within emails leverage browsing and purchase history to surface personalized offers to each subscriber. Prompt-based content generation accelerates creative cycles for promotional emails, lifecycle flows, and segment-specific messaging. Beyond AI augmentation, the 2026 reality also requires deliverability authentication infrastructure (SPF + DKIM + DMARC mandatory since Gmail/Yahoo February 2024, strict enforcement since November 2025; Microsoft May 2025; Apple aligned) and BIMI brand verification for inbox trust signaling. We engineer email programs for 2026: AI-augmented creative and timing, deliverability authentication baked in, BIMI for inbox brand verification, post-Apple-MPP attribution architecture, and Klaviyo Conversion Tracking with server-side event integration for revenue measurement integrity. While AI accelerates execution, every strategic decision remains guided by 50+ in-house specialists with 14 years of email marketing experience.
Request a proposal
Share your platform, category mix, and target markets. A senior strategist replies within one business day with a pricing band and draft roadmap.
1Digital® Agency is a US-based digital marketing agency and Google Partner, founded in 2012 with 14 years of email marketing experience across 400+ brands. 50+ in-house specialists. 4.9/5 across 941+ verified reviews. Shopify Plus Partner, Elite BigCommerce Partner (BigDev Certified). We deliver full-stack eCommerce email marketing — Klaviyo-led (our preferred ESP) plus Mailchimp, Constant Contact, Omnisend, Sendlane, Iterable, Braze — combining strategy, custom HTML creative, conversion-optimized copywriting, deliverability authentication (SPF/DKIM/DMARC), BIMI, AI-augmented subject lines and send-time optimization, post-MPP attribution architecture, and SMS coordination.
February 2024 introduction: Gmail and Yahoo announced bulk sender requirements affecting any domain sending 5,000+ daily emails to their respective inboxes. November 2025 strict enforcement: Gmail moved from soft enforcement to active rejection of non-compliant emails. Non-compliant senders now face temporary deferrals (421-4.7.x errors) or permanent rejections (550-5.7.26 errors). Microsoft joined May 2025: Outlook, Hotmail, Live.com now enforce similar bulk sender rules. Apple aligned with the same authentication standards. Required: SPF + DKIM + DMARC alignment, valid PTR records, TLS encryption, one-click unsubscribe (RFC 8058 — List-Unsubscribe + List-Unsubscribe-Post headers), unsubscribe requests honored within 48 hours, spam complaint rate <0.3% (ideally <0.1%), proper IMF formatting per RFC 5322. Bulk sender classification is permanent — once a domain triggers the 5,000+ daily email threshold, it’s permanently classified as a bulk sender by Gmail. Google Postmaster Tools v2 (October 2025) replaced the legacy reputation model with a binary Compliance Status (Pass/Fail) — previous “High/Medium/Low” reputation no longer protects you.
Brand Indicators for Message Identification: A standard that displays your verified brand logo next to authenticated emails in supporting inboxes (Gmail, Yahoo, Apple Mail). Requirements: DMARC policy at p=quarantine or p=reject (not just p=none), DKIM and SPF authenticated and aligned, Verified Mark Certificate (VMC) from Entrust or DigiCert (or Common Mark Certificate / CMC for some categories), SVG logo meeting BIMI specifications. Impact: Industry studies report 10-39% open rate lift after BIMI implementation — visual brand verification builds trust at the moment of inbox triage. Strategic positioning: BIMI signals deliverability infrastructure maturity to ISPs, compounding sender reputation. As of 2026, BIMI is moving from competitive advantage to baseline expectation for established brands.
Launched September 2021 with iOS 15: Apple Mail prefetches and caches all email images regardless of whether users actually open the email — making open events unreliable. Apple Mail share: Approximately 50%+ of email opens come through Apple Mail (iPhone Mail app, iPad Mail, macOS Mail). Open rates are inflated: “Opens” attributed to Apple Mail Privacy Protection users are not actual opens. Open-rate-based metrics are unreliable: Click-to-open ratio (CTOR), engagement-based segmentation, and re-engagement triggers based on opens are now unreliable. Our approach: We pivot primary KPIs to click rate, click-to-deliveries, revenue per recipient (RPR), revenue per send (RPS), placed-order rate, and Klaviyo Conversion Tracking with server-side event integration. Engagement segmentation pivots from “opened in last X days” to “clicked / converted in last X days.”
eCommerce-native: Built specifically for eCommerce data models — orders, products, customers, lifecycle events. Native integrations with Shopify, BigCommerce, WooCommerce, Magento/Adobe Commerce. Predictive Analytics: Predictive customer LTV, predictive next-order date, churn-risk scoring — built into Klaviyo Predictive Analytics out of the box. Klaviyo SMS: Native SMS in the same platform as email, enabling true cross-channel lifecycle flows without third-party integration. Klaviyo AI: AI-generated subject lines, send-time optimization, content personalization, smart sending. Conversion Tracking: Server-side event integration with eCommerce platforms for revenue-per-recipient measurement that holds up post-MPP. Deliverability infrastructure: Dedicated sending infrastructure with built-in SPF/DKIM/DMARC alignment, BIMI support, and Postmaster Tools v2 monitoring. Other ESPs we work with: Mailchimp (great for SMB and free-tier needs), Constant Contact (mature for non-eCom B2B), Omnisend (Shopify-focused, lower price than Klaviyo), Sendlane (DTC-focused), Iterable (enterprise), Braze (enterprise multichannel).
Welcome series (3-5 emails): Brand introduction, value props, first-purchase incentive, social proof, education. Typical 30-50% revenue contribution among automated flows. Abandoned cart (3-4 emails): 60-90 minutes after abandonment, then 24h, then 72h. Highest-revenue flow per send for most brands. Abandoned browse: Triggered when users view products but don’t add to cart. Lower-converting than abandoned cart but reaches higher volume. Abandoned checkout: Triggered specifically at checkout exit (vs cart). Highest-intent recovery sequence. Post-purchase: Order confirmation, shipping confirmation, delivery confirmation, review request, replenishment, cross-sell. Drives repeat purchase and review velocity. Win-back: Re-engagement for lapsed customers (60/90/180 days since last purchase). Critical for replenishment-cycle products. VIP / loyalty: Top-LTV customers get priority access, exclusive content, early launches. Compounds LTV. Sunset: Removes disengaged subscribers from active list to protect deliverability — counterintuitive but critical for spam complaint rate management. Birthday / anniversary: Automated personal-touchpoint emails. High open and click rates given personal.
Engagements start at $185/hour with four-tier packages: Starter (single-brand foundation, core lifecycle flows, 4 broadcasts/month), Growth (full lifecycle, expanded broadcasts, AI augmentation, BIMI implementation), Enterprise (multi-brand, advanced segmentation, predictive analytics, SMS coordination, deep integrations), Custom (multi-brand, multi-region, headless commerce, complex stacks, in-house team augmentation). 3-month initial term. ESP licenses (Klaviyo, Mailchimp, etc.) are typically separate from agency fees — Klaviyo pricing scales with active profiles + monthly send volume. Typical email marketing program ROI: email contributes 15-30% of total eCommerce revenue for mature programs (vs 5-10% for under-developed programs) — making the ROI math typically 10-30× the agency fee within the first 12 months.
14 years of eCommerce email marketing execution since 2012 with a dedicated email practice. 50+ in-house specialists across email strategists, lifecycle flow architects, custom HTML template designers, conversion-optimized copywriters, deliverability authentication engineers, BIMI implementation specialists, AI augmentation operators, and post-MPP attribution analysts. 400+ brands served. 4.9/5 across 941+ verified reviews. Klaviyo Partner with deep eCommerce platform fluency across Shopify, BigCommerce, WooCommerce, Magento/Adobe Commerce, and headless architectures. We’ve evolved with the field through Apple MPP rollout (September 2021), Gmail/Yahoo bulk sender requirements introduction and enforcement (Feb 2024 → November 2025), Microsoft joining (May 2025), Postmaster Tools v2 (October 2025), and AI-augmented email maturation — calibrated for 2026.