Features

Everything Newsletter Sender can do.

Free for your own newsletters, deployed securely to your Cloudflare account and delivered via Amazon SES or your preferred email provider.

Writing and sending

Visual or HTML editor

Draft effortlessly in the rich text editor (paste cleanly straight from Word or Google Docs), toggle to raw HTML whenever you need complete control, or upload a custom coded template.

The email editor with a heading, text and a button

Test and schedule

Send instant test previews straight to your inbox to check rendering, then schedule broadcasts so campaigns dispatch reliably at the exact moment you want.

Send a test, or choose when the campaign goes

A/B subject line testing

Test two subject lines against a sample of your audience, then automatically dispatch the winning version to the rest of your list.

Two subject lines, the test size, the wait and how the winner is picked

Resend to non-openers

Give important campaigns a second chance. Re-dispatch to subscribers who missed your initial broadcast, paired with a fresh subject line to boost engagement.

A campaign report with the Send again to people who didn't open button

Pre-send checklist

A final review before anything leaves your outbox. Automatically checks links, missing images, subject lines and mandatory unsubscribe footers.

Check before you send, with one link that needs fixing

Full-speed delivery

Dispatches at your sending provider's maximum throughput limit. At 200 emails per second, a list of 100,000 subscribers delivers in under 10 minutes.

Choosing a sending service: Amazon SES, Postmark, Mailgun, Brevo or Resend

Pause or cancel anytime

Pause an active send midway to make adjustments and resume later, or halt it entirely. Track progress in real time with live delivery percentages.

A campaign part way through sending, with Pause and Stop sending buttons

Custom sender per campaign

Tailor the From name and Reply-to address for every campaign. Sender addresses are pre-verified against your SES account before dispatch.

From name, From address and Reply to on one campaign

Lists and growth

Unlimited lists

Create dedicated lists for main audiences, internal testing or specific topics. You choose whether unsubscribing removes a subscriber entirely or only from that specific list.

All lists with active, unsubscribed and bounced counts

Sign-up forms

Get a ready-made hosted sign-up page for every list, plus clean embed code to paste directly into your website.

The hosted sign up page link and the form code for a website

Pop-up forms

Lightweight pop-up capture forms for any website, customisable with your own copy and brand colours.

The pop up form builder with heading, words, timing and code

Double opt-in

Subscribers verify their email address before joining, keeping your list clean and GDPR-compliant by default.

List settings: people confirm by email before they're added

Built-in referrals

Turn readers into advocates. Subscribers get their own unique invite link and unlock rewards you set when they bring friends along.

Referral rewards for a list

One-click polls

Gather reader feedback effortlessly. Embed questions directly into emails for instant, single-click responses tracked in real time.

Adding a one click poll to an email

Forward to a friend

Include a dedicated forward link in your footer so readers can pass campaigns along without forwarding their personal unsubscribe links.

Settings: footer links for Manage your subscription and Forward to a friend

Automated sequences

Set up automated welcome flows, onboarding series or date-triggered emails like birthdays and annual milestones.

Automations: a birthday email and a welcome series

Dynamic segments

Filter and target subscribers based on real activity, such as highly engaged openers and clickers, or contacts who have gone quiet.

Choosing lists, tags and readers who opened lately

Web archive & RSS

Every campaign automatically gets a public web version and an integrated RSS feed, making your past issues easy to browse and share.

The public archive of past campaigns with an RSS link

Reports

Detailed campaign reports

Clear, digestible metrics for every dispatch: sends, opens, clicks, recipient locations and link-by-link click maps.

A campaign report: opens, clicks, unsubscribes and activity

List growth charts

Track audience growth over time with clear breakdowns of new sign-ups, churn and unsubscribes.

Subscriber growth over 90 days: joined, unsubscribed and overall

Sender reputation & health

Monitor bounce and spam complaint rates benchmarked directly against your provider's warning thresholds, letting you resolve issues early.

Sending health: bounces, spam complaints and the sending service

Dispatch notifications

Receive an automated summary email the moment a broadcast finishes, complete with initial delivery numbers.

Settings: Email me when a campaign finishes sending

Deliverability and safety

Effortless SES onboarding

A step-by-step setup wizard provisions your AWS credentials, configures required DNS records in Cloudflare and requests sandbox removal from Amazon.

The Amazon SES set up wizard, choosing a region

Automated list hygiene

Hard bounces and spam complaints are automatically captured and suppressed in real time, shielding your sender reputation from damage.

The blocklist of suppressed addresses

One-click unsubscribe

Every dispatch includes a standard footer link alongside native RFC 8058 one-click unsubscribe headers required by Gmail and Yahoo.

The bottom of an email with Unsubscribe and Manage your subscription links

Built-in delivery safeguards

Automatic protections prevent sending from unapproved sandbox accounts or exceeding daily quotas, pausing dispatches instantly if your provider rejects a batch.

Before sending: notes on the Amazon sandbox and the daily sending limit

Custom tracking domains

Serve links through your own branded subdomain instead of generic worker URLs. One click configures the required Cloudflare DNS settings automatically.

Setting up a custom domain for email links

Bot & spam protection

Block automated bot submissions and spam sign-ups seamlessly across your forms using Cloudflare Turnstile.

The hosted sign up form for a list

Your data

Self-hosted on Cloudflare

Runs entirely inside your own Cloudflare account. Your subscriber lists, campaign drafts and performance analytics remain strictly under your control.

Newsletter Sender running as your own copy: the campaigns home

Privacy by design

Zero tracking pixels or background telemetry by default. Open and click tracking stay completely disabled until you explicitly switch them on.

Tracking settings: opens and clicks, off by default

Seamless migration

Migrate effortlessly from Mailchimp, Sendy, Substack, Kit and more. Suppressed contacts, including past unsubscribes, bounces and complaints, are automatically excluded during import.

Move from Mailchimp, Sendy or another service

Automated nightly backups

Complete database backups are generated every night and stored securely for 30 days, ready to download or restore in one click.

Backups, with a Back up now button

Export anytime

Full portability with zero lock-in. Download your subscribers and lists as clean CSVs whenever you want.

A list with its Export subscribers button

API & webhooks

A comprehensive REST API authenticated via API keys, paired with signed webhooks for real-time subscribe, unsubscribe and delivery events.

API keys and the API base URL

Running newsletters for clients?

The Agency Edition lets you manage unlimited client accounts with isolated workspaces, custom user permissions, monthly send limits and an overarching agency overview.

Explore the Agency Edition