Feature · Drip Email

Drip email automation that actually lands in the inbox.

Strkr's drip email engine handles the parts most marketers skip: sender identity, DMARC and DKIM alignment, inbox placement, suppression lists, bounce handling, warmup, reply detection, and native unsubscribe. The template editor and the step sequence are the fun parts. The engineering underneath is what gets emails read.

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What a drip email engine must handle

The deliverability work most tools skip.

Drip email demos focus on the step builder and the template editor. The engineering under the hood is what determines whether the email lands in the inbox or the spam folder. The nine capabilities below are the ones that make the difference between a drip engine that works for the first month and one that keeps working for years.

Sender identity

The From address, verified.

Every drip email runs from a verified sender identity. The identity is a specific From address with SPF, DKIM, and DMARC alignment configured. Strkr walks the admin through the DNS records at setup and surfaces an identity-health view on the main surface. The pattern prevents the “my emails stopped landing” mystery that strikes six months into a program when a vendor rotates their sending IPs.

Dedicated subdomain

Transactional and marketing, separated.

Strkr recommends and configures a dedicated subdomain (hello.yourcompany.com) for marketing drip, kept separate from the main domain used for transactional email. The separation protects the main-domain reputation from any deliverability trouble on the marketing subdomain. The subdomain is tenant-managed through the admin UI.

Warmup

Start slow, let reputation build.

A new sender subdomain starts cold on reputation. Strkr's warmup engine ramps outbound volume gradually (50 per day, 100, 200, 500, up to full volume over 4-6 weeks) so inbox providers see a legitimate signal pattern. The pattern is boring and essential. Starting at 10,000 emails on day one is how new senders land in the spam folder for the next quarter.

Suppression list

Opt-outs, bounces, complaints, all tracked.

The suppression list captures opt-outs (unsubscribes), bounces (hard and soft), complaints (spam reports), and manually-added blocks. Every send checks the list before the message leaves the queue. The list is tenant-wide so a contact who unsubscribes from the newsletter is excluded from all subsequent sends.

Bounce handling

Hard vs soft, each handled right.

Hard bounces (invalid address, mailbox closed) auto-suppress the contact immediately. Soft bounces (full inbox, server down) retry with exponential backoff and auto-suppress after five consecutive failures. The pattern prevents the “my sender reputation collapsed because 30 percent of my list was bad” failure mode that burns new programs.

Reply detection

The drip stops on reply.

When a recipient replies, Strkr detects the reply (through the integrated mailbox) and auto-pauses the drip for that contact. The rep gets a notification. The pattern prevents the “I replied two days ago and they are still sending me the sequence” annoyance that destroys trust in a drip program.

Native unsubscribe

A one-click link in every email.

Every drip email includes a native unsubscribe link that one-click opts the recipient out. The link is required by CAN-SPAM in the US and by GDPR in the EU, and Strkr includes it by default on every send. The opt-out event logs with the time and the method, and the contact immediately joins the suppression list.

Inbox placement test

A seed list, before every major send.

Before a major send (a quarterly newsletter, a product launch), Strkr can run an inbox-placement test against a seed list of inboxes across the major providers (Gmail, Outlook, Yahoo). The test returns the inbox-vs-promotions-vs-spam ratio per provider. The pattern catches deliverability drift before a real send burns the sender reputation.

List hygiene

Stale contacts, flagged for review.

Contacts who have not opened or clicked in six months get flagged for list-hygiene review. The admin can bulk-suppress, re-engage with a campaign, or auto-expire per policy. The pattern keeps the active list healthy, which keeps the sender reputation strong, which keeps the inbox placement rate high. Everything downstream depends on this one step.

The drip step design

How to build a drip that actually converts.

The step builder gets the demo attention and matters less than the underlying content. The seven design points below are the ones that distinguish a drip that converts from one that annoys.

Short sequences

Three to five emails, not ten.

Most high-performing drips are three to five emails over two to three weeks. Longer sequences see diminishing returns and rising opt-out rates. The pattern is counterintuitive to marketers trained on volume: fewer, better emails outperform more mediocre ones every time.

Context-aware timing

Send when the recipient actually reads.

Strkr's send-time engine reads the recipient's historical open pattern and schedules each drip step at the time they are most likely to open. The pattern is per-recipient rather than per-timezone, which handles the executive who checks email at 10 PM and the ops lead who clears the inbox at 6 AM.

Business-day aware

Skip holidays, skip weekends if configured.

Each drip can skip weekends, skip tenant-configured holidays, and respect a per-recipient timezone. The pattern prevents the “I sent a cold email at 3 AM Christmas Eve” mistake that burns sender reputation and the recipient's goodwill.

A/B subject lines

Test the subject, learn, iterate.

Each drip step can run an A/B subject line test. The system allocates 10 percent of the sends to variant A and B, measures the open rate at 48 hours, and sends the remaining 90 percent with the winning subject. The pattern is more disciplined than the “I guessed at a subject line” default and the results compound over the quarter.

Personalization tokens

First name, company, context.

Each drip email supports personalization tokens: first name, company, recent activity, product tier, upcoming renewal date. The tokens pull from CRM data at send time. The pattern is more effective than global templates and does not require the rep to configure each send manually.

Fallback values

A missing token does not break the email.

Every personalization token has a fallback. If the first name is missing, the email reads “Hi there” rather than “Hi {{first_name}}” or “Hi ,”. The pattern prevents the embarrassing broken-token email that most drip tools ship by default on day one.

Branching logic

Different paths based on behavior.

A drip can branch based on recipient behavior: opened step 2 goes down path A, did not open goes down path B. The branching keeps the drip responsive to the recipient's actual interest rather than running the same sequence regardless of signal. Branching is powerful but easily overused; most high-performing drips use at most one or two branches.

Exit conditions

Reply, booking, qualifying stops the drip.

Beyond reply detection, drip exits on explicit triggers: meeting booked, demo scheduled, deal created, specific stage reached. The pattern keeps the drip tight to the goal rather than running the final steps on a recipient who already converted.

Rep-voice tone

Drafted in the rep's voice, not corporate.

Drips for sales reps work best when they sound like the rep rather than the marketing department. Strkr AI learns the rep's voice from their past outbound and drafts drip steps in that pattern. The pattern turns the drip into a credible extension of the rep rather than an obvious automated sequence.

Compliance for drip email

CAN-SPAM, GDPR, and the direct answers.

Drip email sits inside a compliance surface. The posture below is explicit so the admin can hand it to legal on day one.

CAN-SPAM

US sender rules, honored.

The US CAN-SPAM Act requires an identifiable From address, a non-deceptive Subject, a visible unsubscribe mechanism, a physical mailing address in the footer, and prompt honor of opt-outs. Strkr's drip engine includes all five by default on every send. The pattern prevents the “I did not know I needed a physical address in the footer” mistake that triggers CAN-SPAM complaints.

GDPR

EU consent, lawful basis.

For EU recipients, drip email requires a lawful basis (consent for B2C, legitimate interest or consent for B2B). Strkr tracks the consent event per recipient with the time, method, and scope. Opt-outs honor on first request. The consent record is exportable in the format Data Protection Officers expect.

CASL

Canadian anti-spam, express consent.

For Canadian recipients, Canada's Anti-Spam Law requires express consent (unlike GDPR's legitimate-interest option). Strkr tracks consent events specifically for CASL-regulated recipients and refuses sends to Canadian addresses without an on-file consent record. The pattern is important for teams running cross-border outbound.

Native unsubscribe

One-click opt-out, every email.

Every drip email includes a native unsubscribe link that one-click opts the recipient out. The link is required by every major compliance regime. The opt-out event logs with the time and method, and the contact immediately joins the suppression list.

HIPAA

Compliant, BAA available.

Strkr is HIPAA compliant and executes a Business Associate Agreement on request. Drip emails from healthcare tenants (patient reminders, appointment nudges) can run under the BAA with the field-level mask on variables respected. Retention honors the per-tenant policy.

SOC 2 Type II

In progress through 2026-Q4.

Strkr is actively pursuing SOC 2 Type II with report completion targeted through 2026-Q4. The drip engine, suppression lists, consent tracking, and send audit log are all in scope. Interim artifacts are available under NDA.

How Strkr compares to the drip specialists

When native wins, and when a specialist earns their line.

Dedicated email tools (Mailchimp, ActiveCampaign, Klaviyo, Customer.io) each solve the problem well. The honest buyer math is whether to pay the specialist on top of the CRM or run the native engine at the seat price.

Mailchimp

Mature, consumer-oriented, broad.

Mailchimp is a mature email marketing tool with strong template design and campaign reporting. The gap for B2B teams is the lighter CRM integration and the lack of a native sales motion. Strkr's drip engine shares the same template and sequence capabilities while living inside the CRM, which consolidates the audit log and the sender reputation.

ActiveCampaign

Marketing automation plus a lightweight CRM.

ActiveCampaign is a strong marketing automation platform with a built-in lightweight CRM. For teams running a dedicated sales CRM (Salesforce, HubSpot) plus ActiveCampaign for marketing, the two systems typically diverge over time. Strkr's native pattern collapses the two tools into one with one audit log.

Klaviyo

E-commerce-focused specialist.

Klaviyo is the dominant specialist for e-commerce drip (Shopify, BigCommerce). For teams running a product-led or e-commerce motion, Klaviyo earns its line through the deep product-event integration. Strkr's drip engine is positioned for B2B sales and operations motions and complements e-commerce specialists for teams running both.

Customer.io

Event-driven, developer-friendly.

Customer.io is a strong event-driven messaging platform with excellent API hooks. For teams running a product-led growth motion with heavy event volume, Customer.io earns its line. Strkr's drip engine runs event-driven sends through the open API for teams that need both the CRM-native pattern and event-driven messaging.

HubSpot workflows

Native but tier-locked.

HubSpot ships workflow-driven drip in the Marketing Hub tiers. The gap for most teams is the pricing tier gate: full drip capability lives in HubSpot Professional and Enterprise, which prices substantially above HubSpot Starter. Strkr's drip engine ships on every paid tier at the seat price.

Salesforce Marketing Cloud

Enterprise, expensive, Data Cloud dependent.

Salesforce Marketing Cloud is a mature enterprise marketing automation platform. The honest cost footnote is that complex drip workloads increasingly depend on Data Cloud, which is a six-figure license plus a multi-quarter implementation. For teams under 500 reps, Strkr's native pattern consolidates spend substantially.

Pricing and the open API

What the drip engine costs, and how it integrates.

Drip engines routinely price per email, per contact, or per feature tier. The Strkr posture is explicit so the admin can defend the budget line on day one.

Seat-priced

Included on every paid tier.

The drip engine ships on every paid Strkr tier. There is no “Marketing Edition” or “Email Pack” upsell. The seat price includes the template editor, the step builder, the sequence runner, suppression lists, consent tracking, and the deliverability tooling.

Email volume

Fair-use ceilings, transparent.

Each tier has a fair-use ceiling on monthly email volume (published on the pricing page). Overages ship at a documented per-thousand rate rather than a bespoke “contact sales” negotiation. The pattern lets a growing team predict the next invoice.

No per-contact fee

Add contacts without a surcharge.

There is no per-contact pricing. A tenant with 10,000 contacts costs the same as one with 100,000. The pricing design is important because contact counts grow faster than engineering budgets, and per-contact pricing creates billing anxiety that discourages the list growth marketing teams need.

Open API included

Every drip surface, in the public API.

The template editor, step builder, suppression list, consent record, and send event are all exposed through documented public API endpoints. A customer who wants to trigger a drip from a product event (sign-up, feature usage, renewal milestone) can do so with a documented call. The pattern is important for teams building a product-led motion that triggers drip from product behavior.

No credit meter

API calls are not metered.

API calls to trigger drip are not metered. A team running 100,000 drip triggers per month from product events costs the same as one running 1,000. The design encourages adoption rather than negotiating against it, which is the opposite of the per-event pricing some competitors ship.

Transparent pricing

The number on the public page.

The seat price and the fair-use ceilings are on the public pricing page. There is no “contact sales” opaque pricing for the drip feature set. No bespoke pricing by company size, no willingness-to-pay bidding.

Drip email automation inside the CRM, with the deliverability engineering already done.

Sender identity, DMARC and DKIM alignment, dedicated subdomain, warmup, suppression lists, bounce handling, reply detection, native unsubscribe, and consent tracking ship with Strkr on every paid tier. Templates, steps, A/B subject lines, branching, and the open API are included. Start a trial and ship your first drip before the end of the week.

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Common questions

What buyers ask about this feature.

What makes Strkr's drip email actually land in the inbox?

The deliverability engineering most tools skip: verified sender identity with SPF, DKIM, and DMARC alignment, dedicated subdomain separate from the main transactional domain, warmup that ramps new senders gradually over four to six weeks, suppression lists that capture opt-outs and bounces, hard-bounce auto-suppression after the first failure, soft-bounce retry with exponential backoff, reply detection that pauses the drip, and native unsubscribe on every email. Everything downstream depends on these engineering steps, and Strkr ships them in the box rather than as premium add-ons.

How does Strkr handle CAN-SPAM, GDPR, and CASL compliance?

Every drip email ships with CAN-SPAM-required elements by default: identifiable From, non-deceptive Subject, visible one-click unsubscribe, and physical mailing address in the footer. For GDPR, Strkr tracks the consent event per recipient with the time, method, and scope, and honors opt-outs on first request. For CASL (Canada), Strkr tracks express consent specifically and refuses sends to Canadian addresses without on-file consent. The audit records are exportable in the formats Data Protection Officers expect.

Does Strkr auto-pause a drip when the recipient replies?

Yes. When a recipient replies, Strkr detects the reply through the integrated mailbox and auto-pauses the drip for that contact. The rep gets a notification. Drip also exits on explicit triggers: meeting booked, demo scheduled, deal created, specific stage reached. The pattern prevents the “I replied two days ago and they are still sending me the sequence” annoyance that destroys trust in a drip program.

How does Strkr compare to Mailchimp, ActiveCampaign, or Klaviyo?

Mailchimp is strong on template design and campaign reporting, but lighter on CRM integration and sales motion. ActiveCampaign bundles marketing automation with a lightweight CRM, which typically diverges from a dedicated sales CRM over time. Klaviyo is the dominant e-commerce specialist with deep Shopify integration. Strkr's drip engine shares the same template and sequence capabilities while living inside the CRM, which consolidates the audit log, the sender reputation, and the permission model. For teams running a B2B sales motion plus a product-led signal, the Strkr native pattern typically consolidates spend. For e-commerce-first teams, Klaviyo may still earn its line.

Is there a per-email or per-contact surcharge?

No per-contact surcharge. A tenant with 10,000 contacts costs the same as one with 100,000. Each tier has a fair-use ceiling on monthly email volume published on the public pricing page. Overages ship at a documented per-thousand rate rather than a bespoke “contact sales” negotiation. API calls to trigger drip from product events are not metered.

Is Strkr's drip email HIPAA, SOC 2, and GDPR compliant?

Strkr is HIPAA compliant with a BAA available on request, GDPR compliant with Standard Contractual Clauses on file and an EU-hosted path for EU tenants, and actively pursuing SOC 2 Type II with report completion targeted through 2026-Q4. The drip engine, suppression lists, consent tracking, and send audit log are all in scope. For healthcare tenants running patient reminders or appointment nudges, drip can operate under the BAA with field-level masks on variables.

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