Embeddable forms per list. Double opt-in on a signed URL. Hosted sign-up, confirmation, thank-you and update-profile pages. Import and export that survive a large file. And one-click unsubscribe done to spec.
Every list generates its own embeddable subscription form. Drop the embed on a WordPress page, a static site, a landing page you built somewhere else — it posts to a public subscribe endpoint that needs no login and no API key on the front end.
The form captures your custom fields, not just an email address. Whatever the list is set up to hold, the form can collect — and segmentation can query it the moment it lands.
A subscriber isn't real until they say so. Double opt-in sends a confirmation email carrying a signed URL — the link cannot be forged, and clicking it is the record that they asked to be there.
signed URL unique to that subscriber.Four hosted pages per list, each editable. If you'd rather not host a sign-up page yourself, you don't have to.
Most tools take your CSV, run it on the request thread, and time out on row 40,000. Import here is a background job with a progress view, a cancel button and an error log you can actually download and read.
CSV or XLSX. The file goes up, the job is queued — the browser is not doing the work.
Match each column to an email field or a custom field on the list. Nothing is guessed for you.
Decide how the import behaves before a single row is written.
Watch it run. Cancel it mid-flight. Download the error log for the rows that failed and why.
Export runs the same way: asynchronous, with a progress indicator and a download at the end. Your data is not held hostage.
Gmail and Yahoo now require bulk senders to support one-click unsubscribe. Not a link buried in a footer — a header the mailbox provider itself can act on. CleverlyBox ships RFC 8058 one-click List-Unsubscribe as standard.
There is also a proper signed unsubscribe form, so a person who clicks through leaves cleanly and is recorded as having left. A subscriber who can't get off your list marks you as spam instead — and that costs you the whole domain.
Whatever the form collects becomes a typed custom field on the subscriber — and custom fields are segment operators. Company not blank. Plan equals pro.
New subscriber lands, the welcome flow starts. Twelve automation triggers are available; the form feeds them without any glue code.
Imported a list of unknown quality? Run a verification job over it and segment out the risky addresses before the first broadcast.
No. Each list generates its own embeddable subscription form, and it posts to a public anonymous subscribe endpoint. Paste the embed into your site and it works — no API key exposed in the page, no backend of your own.
Double opt-in is available and works via a signed confirmation URL — the link is cryptographically tied to the subscriber, so it can't be forged. Use it wherever consent quality matters, which for most senders is everywhere.
No. Import is a four-step wizard (upload, field mapping, settings, progress) and the work runs as an asynchronous job. You can cancel it while it runs, and download an error log listing the rows that failed.
CSV and XLSX. You map each column to a list field yourself during step two, so nothing is silently miscast.
Yes. RFC 8058 one-click List-Unsubscribe is supported, alongside a hosted signed unsubscribe form for people who click the link in the body.
Yes — an update-profile page is one of the four list template pages, alongside the sign-up, confirmation and thank-you pages. All of them are yours to edit.
Forms, double opt-in, import, export and one-click unsubscribe — all in the tool that sends.