The plumbing that keeps you out of spam, already built.
Lnkbase Newsletter sends through Cloudflare Email Sending, from your own domain or ours, with every protection on from day one. The live numbers are on the deliverability page.
Analytics → Deliverability: delivery, bounces and complaints by mailbox provider. Live demo with sample data.
15 of 22 built
✓Built◐Partly built (it says what's missing)–Not something software can include
–A 99.3% delivery rateA result, not a feature: it depends on your list and content. We publish our real rate at /open.
–A team of deliverability expertsSoftware can't include people. The deliverability guide covers what they'd set up.
◐Infrastructure to send 3M+ emails per minuteSends about 1,200 emails a minute per issue by default, 10 at a time. Built for lists up to the hundreds of thousands.
✓Every email submission validated (forms, API and imports)
–Registering for every mailbox provider's feedback programYou register your domain with each provider; the guide lists them and the app receives the reports.
✓Feedback-loop and bounce reports received by the app itself (Email Routing and Cloudflare's sending events) and turned into suppressions
◐A Feedback-ID on every email, so Gmail reports complaint rates per newsletterCloudflare Email Sending sets the Feedback-ID header itself, so Gmail's report is per sending account. We tag every email with its own ID to match complaints to the newsletter.
✓Every bounce classified: hard, soft, mailbox full, DNS, policy — retry or never again
✓Three suppression layers: global, per publication and transactional
✓Temporary suppressions that expire, and permanent ones that never do
✓One-click unsubscribe (RFC 8058), as Gmail and Yahoo require
◐Warming new IPs and domains on a scheduleEvery sending domain warms up automatically, the default one included. Cloudflare manages the sending IPs, so there are none to warm.
◐Watching blocklists and pulling an IP the moment it's listedSending domains are checked every 6 hours and paused if listed. IPs are Cloudflare's, so there's no IP rotation to manage.
✓Deferred mail retried for 26 hours before it counts as a bounce
✓Disposable, invalid and typo'd addresses blocked before they reach the list
✓Rate limits on every signup endpoint
✓Bot clicks and machine opens filtered out of every report
✓An acquisition source on every subscriber
✓Engagement history for every reader, across every post
✓Several sender addresses for different emails
✓Custom domains aligned with DKIM, SPF and DMARC, with live DNS checks
