Deliverability insights
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Lemlist: Add Seed Emails to Every Cold Outreach Sequence
Lemlist leans on personalisation to reach inbox. Seed addresses verify the personalisation actually helped — per provider, per campaign.
Flodesk: Beautiful Emails — But Do They Hit Inbox? Seed Test Them
Flodesk designs for creators. Image-heavy templates are Promotions-tab bait. Seed tests tell you when a gorgeous design torpedoed your open rate.
Buttondown: Minimalist Newsletter + Inbox Placement Check
Buttondown skews to indie newsletter writers. Small lists, loyal readers — but spam placement still happens. Seed-test before every send.
Ghost Newsletter: Seed Testing for Independent Publishers
Ghost publishers own their list and their deliverability. Seed addresses are the only no-vendor way to verify inbox placement per issue.
Substack: Can You Even Test Deliverability? (Yes, Here is How)
Substack gives writers little deliverability control. But you can still subscribe seed addresses to your own publication and measure placement.
Beehiiv: Newsletter Deliverability — Are Your Seeds Hitting Inbox?
Beehiiv grew from zero to 750K newsletters fast. Their shared sending pool changes over time. Seed-test every issue to catch pool-reputation drift.
Omnisend: E-commerce Email + SMS — Test Email Leg With Seeds
Omnisend runs both SMS and email for DTC stores. The email leg is where spam happens. Seed addresses on every flow make the problem visible.
Moosend: How to Verify Inbox Placement With Seed Addresses
Moosend is affordable and popular in Europe. Dashboard reports delivered — seeds report where. Add both and you close the loop.
Campaign Monitor: Seed Test Your Branded Emails
Campaign Monitor caters to agencies. Every client send is a brand risk if it lands in spam. Seed addresses catch it before clients complain.
MailerLite: Free Newsletter Tool + Free Inbox Placement Test
MailerLite's free tier is generous. Pair it with our free seed-testing tool and you have a zero-cost stack that still produces real deliverability data.
Drip: E-commerce Email Seed Testing Before Automated Workflows
Drip automates DTC email journeys. A bad workflow burns subscriber trust silently. Seeds on every workflow let you audit placement non-interactively.
AWeber: Inbox Placement Testing With Seed Emails
AWeber is an old guard ESP with a mature reputation system. Seed addresses show you when shared IP reputation shifts affect your deliverability.
GetResponse: Add Seed Addresses to Autoresponders and Newsletters
GetResponse runs autoresponders that touch subscribers for months. A single drift means losing conversions. Seed every step of the autoresponder chain.
Constant Contact: How to Test Inbox Placement of Your Campaign
Constant Contact is one of the oldest ESPs. Their delivery reports are legacy-shaped. Seed addresses give you a modern inbox-vs-spam signal.
Klaviyo: Seed Emails for E-commerce — Test Before Your Black Friday Send
Black Friday is the single worst day to discover your Klaviyo flow lands in Gmail Promotions. Seed-test the flow weeks in advance.
ConvertKit (Kit): Seed Test Your Newsletter Before 10K Subscribers See It
ConvertKit is the creator ESP. One bad send loses trust with thousands. Seeds in a pre-test broadcast de-risk every launch.
ActiveCampaign: Test the Actual Automation Step
To test an ActiveCampaign automation step, verify both the email content and the path that allows a contact to reach that step.
HubSpot Email: How to Include Seed Addresses in Marketing Emails
HubSpot marketing email is bundled with CRM workflows. Add seed contacts to your send lists and verify before every automation pushes to real contacts.
Seed Testing Your Brevo (Sendinblue) Campaigns: Step by Step
Brevo's newsletter and transactional tiers share a reputation pool. Seed addresses on every send surface pool drift before it costs you opens.
How to Add Seed Emails to Your Mailchimp Campaign
Mailchimp has 12M+ users and still does not expose real inbox placement. Here is the one-minute pattern for adding seed addresses to every Mailchimp send.
Firebase / Supabase Auth Emails: Are Verification Emails Reaching Users?
If your signup verification email lands in spam, activation dies. Test Firebase and Supabase auth emails with real inbox placement, not just logs.
Stripe / Paddle Receipt Emails: Payment Confirmation Deliverability
Customers who do not get a receipt contact support. Stripe and Paddle send on your behalf — test real inbox placement for those emails here.
Typeform / Tally Response Emails: Deliverability Check
Form notifications from Typeform and Tally often go to Promotions or Spam. Test and fix deliverability before more submissions get lost.
Calendly Confirmation Emails: Do They Reach Your Clients?
A booking confirmation in spam is a missed meeting. Check Calendly confirmation deliverability across Gmail, Outlook, Yahoo and more.
ClickUp Email Notifications: Are They Hitting Spam?
Teams miss ClickUp mentions because notifications land in spam. Here is how to test, fix, and subscribe for the native ClickUp plugin beta.
Monday.com Email Notifications: Deliverability Test
Monday.com notifications are noisy and easily trained as Spam by users. Test placement and tune opt-in. Beta plugin waitlist open.
Airtable Email Deliverability: Do Your Automations Actually Reach People?
Airtable automations fire email on row changes. They look delivered in the log. Real inbox placement is a different story — test it here.
n8n Email Nodes: Free Inbox Placement Test for Self-Hosted Workflows
Self-host n8n and pair it with our free placement API. Every email your workflow sends can be placement-tested before scale.
Make.com (Integromat) Email Deliverability: Test Before Automating
Make.com chains modules to fire emails at scale. One misconfigured step sends everything to spam. Add a seed-test module before the Send.
Zapier Email Actions: How to Check Deliverability of Automated Emails
Zapier makes it trivial to automate email. It also makes it trivial to ship badly-configured email. Insert a deliverability check between zaps.
Freshsales / Freshdesk Email Deliverability: Test Your Support Emails
Support ticket replies going to spam breaks SLAs. Test Freshdesk outgoing placement before customers complain.
Pipedrive Email Deliverability: Are Your Sales Emails Reaching Prospects?
Pipedrive is a sales team favourite. Each rep's email reputation differs. Seed-test per sender and surface the weak ones fast.
HubSpot CRM Email Deliverability: Free Test Before Sequences
HubSpot CRM sequences send rep-level email at volume. A single misconfig kills reply rates across a team. Pre-test with seeds.
Salesforce Email Deliverability: Test Before Your Next Automation
Salesforce Marketing Cloud and sales Cadences operate at enterprise scale. The bigger the send, the bigger the cost of a placement miss.
Zoho CRM Email Deliverability: Why Leads Do Not Get Your Follow-Ups
Zoho CRM follow-ups land in Promotions more often than reps realise. Here is how to test before your next outreach cycle.
Microsoft 365 Email Deliverability: Test Before Sending Company-Wide
Microsoft 365 is tenant-scoped — a misconfigured connector hurts every user. Pre-deploy placement checks catch it before IT gets paged.
Google Workspace Email Deliverability: Test Your Business Emails
Workspace domains rarely land in Gmail spam — until they do. One bad DKIM push, every user affected. Seed-test company-wide sends first.
Framer Form Submissions: Email Deliverability Check
Framer sites rely on form notifications to drive leads. Submissions that do not reach the inbox are dead leads. Test placement from your Framer setup.
Notion Email Notifications: Do They Reach Your Team's Inbox?
Notion emails notifications for comments, mentions, calendar. When they land in spam, the team misses the ping. Test and subscribe for the plugin beta.
Webflow Form Email Deliverability: Why Submissions Go Missing
Webflow sites rely on form notifications to drive leads. Missing notifications = missing revenue. Check placement; join the Webflow plugin beta.