Title: Letterness – Newsletter Popup, Signup Forms & Built-in Email Sending Author: kamrankazmi Published: août 9, 2026 Last modified: septembre 1, 2026 --- Search plugins ![](https://ps.w.org/letterness/assets/banner-772x250.png?rev=3655439) ![](https://ps.w.org/letterness/assets/icon.svg?rev=3655439) # Letterness – Newsletter Popup, Signup Forms & Built-in Email Sending By [kamrankazmi](https://profiles.wordpress.org/kamrankazmi/) [Download](https://downloads.wordpress.org/plugin/letterness.4.1.2.zip) * [Details](https://tah.wordpress.org/plugins/letterness/#description) * [Reviews](https://tah.wordpress.org/plugins/letterness/#reviews) * [Installation](https://tah.wordpress.org/plugins/letterness/#installation) * [Development](https://tah.wordpress.org/plugins/letterness/#developers) [Support](https://wordpress.org/support/plugin/letterness/) ## Description **Letterness is a complete, free newsletter and email marketing plugin for WordPress.** Grow your email list with a beautiful newsletter popup and signup forms, then write and send newsletters to your subscribers straight from your dashboard, no third- party account, no monthly fee, and your subscriber list stays in your own database. Letterness is designed, developed, and maintained by **Kamran Kazmi**, the creator and owner of the plugin. Most newsletter plugins make you choose: a pretty opt-in popup from one plugin, sending from another service, automations behind a paywall. Letterness puts subscriber capture, email sending, automations, and analytics in one lightweight plugin, controlled from a single screen. [Home & docs](https://kumailkazmi.com) #### Why choose Letterness? * **Free and self-hosted.** No SaaS account, no per-subscriber pricing, no sending caps beyond your own host. * **All-in-one.** Capture, send, automate, and measure without stitching plugins together. * **Lightweight and fast.** Front-end CSS and JavaScript load only on pages where they are actually needed, so your page speed stays intact. * **Privacy-friendly.** Built-in consent capture, signed one-click unsubscribe, and analytics that store a hashed key instead of raw emails. * **Works with your setup.** Any theme (classic or block), Gutenberg, Elementor, page caches, and any SMTP/ESP plugin. #### Capture subscribers three ways * A responsive **newsletter popup** with time-delay, scroll-depth, or exit-intent triggers. * A **sidebar signup card** for any widget area or placed with a shortcode. * A **subscribe button** for a theme menu, plus an **inline signup form** shortcode and a Gutenberg **form block**. #### Send newsletters from WordPress * Compose in the standard WordPress editor with **ten responsive email templates**( newsletter, blog digest, announcement, welcome, product, simple, minimal, magazine, holiday, featured). * **Personalization merge tags** such as `{first_name|there}`, `{site_name}`, and`{ unsubscribe_url}`, with fallbacks so blank values never look broken. * Save drafts, **schedule** for later, or send now, with **throttled batch delivery** and live queue status (queued, processing, sent, failed). * Sends through WordPress `wp_mail()`, so **any SMTP plugin** (WP Mail SMTP, FluentSMTP, Post SMTP, and others) works automatically. #### Automations * **Welcome email** when someone subscribes, immediately or after a delay you set. * **New-post notifications** that email your subscribers when you publish, instantly or as a scheduled daily or weekly digest. #### Analytics * **Open and click tracking** per campaign: opens, unique opens, open rate, clicks, unique clicks, click rate, clicked links, and top link. * A subscriber-growth chart and source breakdown for your list. #### Deliverability and compliance * **List-Unsubscribe** and one-click headers (RFC 8058) so Gmail and Yahoo show a native unsubscribe button. * Visible unsubscribe link, a branded confirmation page, a re-subscribe option, and instant suppression. * GDPR-style **consent** checkbox with your own text and privacy-policy link. #### Audience management * Lists, tags, and custom fields with bulk actions and filters. * Subscriber statuses (active, pending, unsubscribed, bounced) and CSV export. #### Shortcodes * `[letterness_form]` – inline signup form. * `[letterness_card]` – sidebar signup card. * `[letterness_subscribe_button]` – subscribe button. Letterness is built to be secure, accessible, translation-ready, and RTL-friendly. For the best inbox placement on larger lists, pair it with a free SMTP plugin. ## Screenshots [⌊The newsletter popup on the front end with the signup form.⌉⌊The newsletter popup on the front end with the signup form.⌉[ The newsletter popup on the front end with the signup form. ## Blocks This plugin provides 1 block. * Letterness Signup Form ## Installation 1. Upload the `letterness` folder to `/wp-content/plugins/`, or install through ** Plugins > Add New** and search for « Letterness ». 2. Activate the plugin through the **Plugins** screen. 3. Open **Letterness** in the admin menu to set up triggers, design, content, automations, and sending. 4. (Optional) Add the signup card under **Appearance > Widgets**, or place `[letterness_form]`,`[ letterness_card]`, or `[letterness_subscribe_button]` anywhere. 5. (Recommended) Install a free SMTP plugin for reliable delivery. ## FAQ ### Is Letterness really free? Yes. Every feature described here is free, subscriber capture, unlimited storage in your own database, newsletter sending, automations, and analytics. There is no per-subscriber pricing. ### Do I need a third-party email service like Mailchimp? No. Letterness stores subscribers in your own WordPress database and sends through` wp_mail()`. For higher deliverability on larger lists we recommend a free SMTP plugin such as WP Mail SMTP or FluentSMTP, which Letterness detects and uses automatically. ### Can I send a welcome email automatically? Yes. Turn on the welcome automation and choose to send immediately or after a delay in minutes, hours, or days. ### Can Letterness email my subscribers when I publish a new post? Yes. New-post notifications can send instantly on publish or collect posts into a scheduled daily or weekly digest, filtered by post type and category. ### Does it track opens and clicks? Yes. Each campaign shows opens, unique opens, open rate, clicks, unique clicks, click rate, and the most-clicked links. Open tracking relies on a tracking pixel and is approximate, since many email apps block or preload images; click tracking is exact. ### How do visitors unsubscribe? Every email has a visible, signed one-click unsubscribe link and standards-based List-Unsubscribe headers, so inbox providers can show a native unsubscribe button. Unsubscribing shows a confirmation page and immediately suppresses the address. ### Is it GDPR-friendly? Letterness includes an optional consent checkbox with your own wording and privacy- policy link, records consent, and never sells or shares data. Analytics store a one-way hash of the email rather than the address itself. ### Can I show a different design on mobile? Yes. Colors, image, shape, size, and animations each have an optional mobile override, so desktop and mobile can look completely different. One « size » control scales every element responsively. ### Does it work with block themes, Elementor, and page caches? Yes. The popup shows via JavaScript and the form block is server-rendered, so it works with classic and block themes, Elementor, Gutenberg, and caching plugins. Use the shortcodes or the block to place forms anywhere. ### Is the popup accessible? Yes. The popup is a keyboard-accessible dialog: focus moves into it on open and back on close, focus is trapped inside, Escape closes it, controls are labeled for screen readers, and reduced-motion and RTL are supported. ### What happens to my data when I uninstall? Deleting the plugin removes its options, both custom tables (subscribers and newsletters), the analytics events, and any scheduled events. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “Letterness – Newsletter Popup, Signup Forms & Built-in Email Sending” is open source software. The following people have contributed to this plugin. Contributors * [ kamrankazmi ](https://profiles.wordpress.org/kamrankazmi/) [Translate “Letterness – Newsletter Popup, Signup Forms & Built-in Email Sending” into your language.](https://translate.wordpress.org/projects/wp-plugins/letterness) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/letterness/), check out the [SVN repository](https://plugins.svn.wordpress.org/letterness/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/letterness/) by [RSS](https://plugins.trac.wordpress.org/log/letterness/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 4.1.2 * New: build newsletters faster by pasting an article URL, Letterness fetches the title, featured image, and summary and inserts a ready-made article block. * New: set the popup background to a solid color or a gradient, with independent desktop and mobile controls. * Improved: field labels now sit inside their inputs consistently (name and email both use in-field labels). * Improved: cleaner popup header, the site name is centered and the placeholder icon was removed. * Changed: the default popup heading is now « Join Newsletter » (fully editable as before). #### 4.1.1 * Fixed: shaped popups (circle, hexagon, octagon) now keep a fixed shape at every size and never distort, clip, or show a scrollbar. * Fixed: popup content now scales to fit its shape, size, and device automatically, so every element stays responsive on desktop and mobile. * Fixed: mobile popups are correctly sized to the viewport instead of overflowing. * Author information updated. #### 4.1.0 * Design: independent desktop and mobile controls, popup shapes, and a single « size » control that scales every element responsively so shaped popups never clip. * Targeting: show or hide by page, post type, category, URL, login state, and device. * Consent and inline forms: consent capture, a `[letterness_form]` shortcode, and a Gutenberg form block. * Audience: lists, tags, and custom fields with bulk actions and filters. * Personalization: merge tags such as {first_name|there}, {site_name}, and {unsubscribe_url}, with fallbacks. * Templates: ten responsive newsletter templates across common categories. * Automations: welcome email (immediate or delayed) and new-post notifications ( instant or digest) on a lightweight event/delay/action scheduler. * Analytics: campaign open and click tracking with unique counts, rates, top links, and a per-campaign breakdown. Open tracking is approximate by nature. * Deliverability: works with any SMTP/ESP plugin via wp_mail(), configurable batch throttling with queue states (queued, processing, sent, failed), Reply-To, and RFC 8058 List-Unsubscribe one-click headers. * Unsubscribe: visible link, branded confirmation page, one-click support, re-subscribe option, and immediate suppression. * Hardening: keyboard-accessible popup with focus management and Escape to close, reduced-motion and RTL support, conditional asset loading, and a full security pass (nonces, capabilities, prepared queries, escaping, signed tokens). #### 4.0.1 * Enqueued the preview highlight styles and script instead of printing them inline. * Housekeeping and code-quality improvements. #### 4.0.0 * Public release on WordPress.org. * Independent desktop and mobile design for the popup. * Built-in newsletter composer with drafts, scheduling, and batched sending. * Sidebar signup card, header subscribe button, and shortcodes. * Secure token-based one-click unsubscribe. * Subscriber CSV export. ## Meta * Version **4.1.2** * Last updated **4 semaines ago** * Active installations **Fewer than 10** * WordPress version ** 6.2 or higher ** * Tested up to **7.0.6** * PHP version ** 7.4 or higher ** * Language * [English (US)](https://wordpress.org/plugins/letterness/) * Tags * [Email Marketing](https://tah.wordpress.org/plugins/tags/email-marketing/)[email subscribers](https://tah.wordpress.org/plugins/tags/email-subscribers/) [newsletter](https://tah.wordpress.org/plugins/tags/newsletter/)[popup](https://tah.wordpress.org/plugins/tags/popup/) [subscribe](https://tah.wordpress.org/plugins/tags/subscribe/) * [Advanced View](https://tah.wordpress.org/plugins/letterness/advanced/) ## Ratings No reviews have been submitted yet. [Your review](https://wordpress.org/support/plugin/letterness/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/letterness/reviews/) ## Contributors * [ kamrankazmi ](https://profiles.wordpress.org/kamrankazmi/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/letterness/)