Title: smartest.email Author: smartestemail Published: October 26, 2026 Last modified: October 26, 2026 --- Search plugins ![](https://ps.w.org/smartest-email/assets/banner-772x250.png?rev=3767354) ![](https://ps.w.org/smartest-email/assets/icon-256x256.png?rev=3767354) # smartest.email By [smartestemail](https://profiles.wordpress.org/smartestemail/) [Download](https://downloads.wordpress.org/plugin/smartest-email.0.4.0.zip) * [Details](https://wordpress.org/plugins/smartest-email/#description) * [Reviews](https://wordpress.org/plugins/smartest-email/#reviews) * [Installation](https://wordpress.org/plugins/smartest-email/#installation) * [Development](https://wordpress.org/plugins/smartest-email/#developers) [Support](https://wordpress.org/support/plugin/smartest-email/) ## Description smartest.email brings your workspace’s signup forms to WordPress. Connect securely, choose a form and publish it using the native block editor or a shortcode. Campaigns, contacts, consent records and email delivery stay in smartest.email. The plugin supports individual WordPress installations. WordPress multisite is not supported yet. A smartest.email account, HTTPS and at least one active double opt- in form with required consent and a privacy policy URL are required. The plugin is free; access to the external smartest.email service is subject to the account’s plan and limits. No paid checkout or plan entitlement is introduced by this plugin. Features: * Secure connection using OAuth authorization codes, S256 PKCE and rotating refresh tokens; no shared client secret or API key to paste. * Native “smartest.email signup form” block and [smartest_email_form id=”FORM_UUID”] shortcode. * Searchable form selection and non-submitting desktop/mobile previews using the active website theme. * Use your site theme, smartest.email styling or a custom palette, with site defaults and per-placement overrides. * Separate Connection, Forms, Appearance and Languages settings, with connection checks and safe diagnostics. * Language-to-form mappings and an explicit fallback, using the page language from WordPress, Polylang or WPML. * Responsive stacked/two-column fields, standard/full width, custom button labels and full-width buttons, with matching shortcode options. * Native block color, typography and spacing controls where supported by your theme. * Searchable form cards, mapped-language badges, links to edit forms and known page placements, and shortcode copying with a manual-copy fallback. * Current form fields, consent copy and privacy policy link from smartest.email. * Accessible labels, browser validation, readable status messages and styles that work with your theme. * Email confirmation before a new contact becomes subscribed. Existing unsubscribed or suppressed addresses are not reactivated. * Idempotent retries after network failures. An uncertain submission keeps its original payload and identifiers in page memory until resolved or the page is closed. * Local nonces, signed short-lived form contexts, honeypot and request limits. These complement the service’s subscription limits; they are not a CAPTCHA. * Connection status, refreshable form list and local disconnection. * WordPress controls and messages in 19 locales, including right-to-left Arabic. ### External service This plugin connects to the smartest.email service at https://smartest.email and https://api.smartest.email. When a site administrator connects, the browser opens smartest.email for approval. WordPress then exchanges the returned code for access and refresh tokens. The plugin sends authenticated requests to retrieve the connected workspace’s name and eligible form definitions. It sends token refresh and revocation requests when needed. When a visitor explicitly submits a form, the plugin sends the declared form fields( including the email address), the current consent text, a consent timestamp, the selected form ID, a random installation ID and a random submission ID to smartest. email. smartest.email records consent, enforces suppression and sends any required confirmation email. The plugin does not send the visitor’s IP address to smartest. email. OAuth credentials are encrypted with WordPress salts and stored in a non-autoloaded option. Changing those salts requires reconnecting. Cached form definitions expire after five minutes. Local anti-abuse counters store salted hashes of visitor IP addresses for up to six minutes; raw IP addresses are not stored by this plugin. Subscriber fields are not persisted in WordPress, plugin logs, localStorage or sessionStorage. Other site infrastructure may keep its own request logs. Appearance preferences, language mappings and safe connection diagnostics (timestamps and a limited error category) are stored locally. Previewing a form does not send a subscription. An authenticated preview loads the active theme’s styles and fonts; theme assets retain their usual hosts. Disconnect before deleting the plugin to revoke the service grant. If revocation cannot be confirmed, the local credentials are still removed and a notice explains how to revoke the connection in smartest.email. Uninstall removes local plugin options and database-backed transients; cached transient entries in an external object cache expire normally. Uninstall does not delete contacts, consent records or forms in smartest.email. Service and support: https://smartest.email Setup guide: https://smartest.email/ docs/integrations/wordpress Privacy policy: https://smartest.email/privacy Terms: https://smartest.email/terms ## Screenshots [⌊Connection status, workspace controls and diagnostics in Settings → smartest.email.⌉⌊ Connection status, workspace controls and diagnostics in Settings → smartest.email .⌉[ Connection status, workspace controls and diagnostics in Settings smartest.email. [⌊The searchable form library and a read-only preview using the active theme.⌉⌊The searchable form library and a read-only preview using the active theme.⌉[ The searchable form library and a read-only preview using the active theme. [⌊The smartest.email signup form block in the WordPress editor.⌉⌊The smartest.email signup form block in the WordPress editor.⌉[ The smartest.email signup form block in the WordPress editor. [⌊A published newsletter signup form with required consent and a privacy policy link.⌉⌊A published newsletter signup form with required consent and a privacy policy link.⌉[ A published newsletter signup form with required consent and a privacy policy link. ## Blocks This plugin provides 1 block. * smartest.email signup form Add a double opt-in newsletter signup form from your connected workspace. ## Installation 1. Upload the smartest-email ZIP through Plugins Add New Upload Plugin, or copy the smartest-email directory to wp-content/plugins/. 2. Activate the plugin on an individual WordPress installation. 3. Open Settings smartest.email and select Connect to smartest.email. 4. Sign in to smartest.email, check the displayed WordPress callback domain and approve the workspace connection. 5. Create an active double opt-in signup form in smartest.email with a required consent checkbox and a privacy policy URL. Select Refresh forms in WordPress if necessary. 6. Add the smartest.email signup form block to a page and choose the form. Alternatively, copy the shortcode from the settings page. 7. Review the published page and your privacy notice before inviting visitors to subscribe. Sodium or OpenSSL is required for encrypted credential storage. Production connections require valid HTTPS certificates. JavaScript must be enabled in visitors’ browsers to submit a form. ## FAQ ### Does this plugin send campaigns from WordPress? No. Campaign creation and delivery stay in smartest.email. This plugin connects your website and collects newsletter signup consent. ### Does installing it subscribe existing WordPress users? No. There is no user import or automatic subscription. A visitor must submit the form and confirm when required. Existing and suppressed addresses receive the same generic response. ### Can I edit the form in WordPress? Choose the form in WordPress and manage its fields and consent copy in smartest. email. Block appearance controls affect only that placement; they cannot remove required fields, consent, the privacy link or email confirmation. Cached definitions expire after five minutes. If a form changes while a visitor is completing it, they must reload and review the updated consent before submitting. ### Which shortcode appearance options are supported? [smartest_email_form id=”FORM_UUID” layout=”two-column” width=”full” button_width =”full” button_label=”Join our newsletter”] layout accepts inherit, stacked or two-column. width accepts inherit, standard or full. button_width accepts inherit, auto or full. Omitted shortcode appearance values inherit the site defaults, initially stacked, standard width and automatic button width. button_label is plain text, up to 80 Unicode characters; leaving it empty uses the translated Subscribe label. Two-column layouts stack on small screens. Native WordPress color, typography and spacing controls belong to blocks; use a styled Group block around a shortcode when needed. Existing blocks retain their layout defaults; newly inserted blocks inherit site preferences. style accepts inherit (default), theme, brand or custom. Custom mode also accepts accent, button_text, field_background, field_text and border as hex colors, plus radius from 0 to 32 pixels. For example: [smartest_email_form id=”FORM_UUID” style=”custom” accent=”#245b46″ button_text=”# ffffff” radius=”12″] ### How does theme styling work? Use site theme is the default. Forms inherit typography and text color, keep low- specificity visual fallbacks and use WordPress button classes so theme and Global Styles can apply. Branded and custom modes provide their own fields and buttons. A theme’s unusual or highly specific rules may still need a site-level adjustment. Preview uses active-theme assets; the final page template and surrounding blocks can add styles that differ from the preview. ### How do language mappings work? In Settings smartest.email Languages, assign an eligible form to each language and optionally select a fallback. Set a block’s Form selection to Match the page language, or use [smartest_email_form selection=”automatic”]. Existing manually selected forms keep their IDs. Selection uses the page locale from Polylang when available, then WPML’s current language hooks, otherwise the WordPress site locale. It tries an exact locale, a configured parent language and a sole mapping for that base language, then the explicit fallback. It does not guess between multiple regional mappings. If a configured form becomes unavailable, the placement remains unavailable until corrected; it never silently substitutes different consent. Clear page caches after changing mappings, and configure multilingual caches to distinguish page languages. English (US/UK), Dutch, German, French, Spanish, Polish, Arabic, Portuguese (Portugal/ Brazil), Italian, Simplified Chinese, Swedish, Norwegian Bokmål, Latvian, Estonian, Finnish, Greek and Japanese interface locales are included. WordPress selects the administrator’s interface language separately from the visitor’s page language. Form labels, consent and privacy links are authored in smartest.email, and the confirmation email uses that form’s configured language. Mapping a form does not translate its content or change its confirmation settings. Use a separate translated form for each audience. ### Does the form library show every place a form is used? It lists detected block, shortcode and synced-pattern placements in up to 300 recently updated posts and pages the administrator can edit. It is a useful shortcut, not a complete index of templates, widgets, custom post types or third-party page builders. ### Can previews send a subscription? No. Editor and settings previews show the current form with disabled fields and no submission context or live form handler. The theme preview is sandboxed and cannot execute scripts or submit forms. Use a published page for an intentional signup test. Preview routes require an authenticated user who can edit posts and a valid WordPress nonce. ### What happens if the connection fails while submitting? The visitor can safely retry in the same page. The plugin retains the original submission identifiers, values and consent time in memory so the service can avoid duplicate confirmation emails. Do not reload the page until an uncertain request has been resolved. ### Why do I need to reconnect? The authorization may have been revoked, the authorizing user’s permissions may have changed, WordPress salts may have changed, or a refresh response may have been lost. The plugin does not replay a refresh token after an uncertain rotation. ### Does this work with page caching? Yes. Submission nonces and signed contexts are fetched immediately before posting, with no-store response headers. Exclude /wp-json/smartest-email/v1/ from any cache rules that override those headers. Purge page caches when changing form fields or consent copy. ### Does it support WooCommerce or other form plugins? Only the native block and shortcode are included. Purchase-triggered campaigns, checkout opt-in and third-party form adapters are not implemented. ### Can I use a reverse proxy? Yes. Configure WordPress’s HTTPS and home URL correctly. The plugin uses REMOTE_ADDR for local anti-abuse limits and does not trust arbitrary forwarding headers. Your trusted proxy configuration should supply the correct client IP. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “smartest.email” is open source software. The following people have contributed to this plugin. Contributors * [ smartestemail ](https://profiles.wordpress.org/smartestemail/) [Translate “smartest.email” into your language.](https://translate.wordpress.org/projects/wp-plugins/smartest-email) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/smartest-email/), check out the [SVN repository](https://plugins.svn.wordpress.org/smartest-email/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/smartest-email/) by [RSS](https://plugins.trac.wordpress.org/log/smartest-email/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 0.4.0 * Add theme, smartest.email and custom appearance modes with site defaults and block/shortcode overrides. * Organize settings into Connection, Forms, Appearance and Languages, with safe diagnostics and placement links. * Add explicit language-to-form mappings, a fallback and page-language detection for WordPress, Polylang and WPML. * Load active-theme assets in authenticated, sandboxed desktop/mobile previews. * Expand all 18 translated catalogs alongside the US English source interface. #### 0.3.0 * Refresh plugin settings and signup form styling with smartest.email branding. * Improve responsive layouts, keyboard focus and accessible status presentation. * Prepare the WordPress.org package, service disclosures and directory artwork. * Remove orphaned local transient timeout records during uninstall. #### 0.2.0 * Add searchable form selection, refresh/retry states and a live read-only block preview. * Add responsive layout, width and button options with shortcode parity and native block styling. * Add searchable settings cards, read-only previews and accessible shortcode copying. * Preserve centrally managed consent and required fields; translate the new interface in all 19 supported languages. #### 0.1.0 * Initial single-site connection, block, shortcode and double opt-in subscription implementation. ## Meta * Version **0.4.0** * Last updated **4 days ago** * Active installations **Fewer than 10** * WordPress version ** 6.5 or higher ** * Tested up to **7.1.4** * PHP version ** 8.1 or higher ** * Tags * [double opt in](https://wordpress.org/plugins/tags/double-opt-in/)[Email Marketing](https://wordpress.org/plugins/tags/email-marketing/) [newsletter](https://wordpress.org/plugins/tags/newsletter/)[signup form](https://wordpress.org/plugins/tags/signup-form/) * [Advanced View](https://wordpress.org/plugins/smartest-email/advanced/) ## Ratings No reviews have been submitted yet. [Your review](https://wordpress.org/support/plugin/smartest-email/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/smartest-email/reviews/) ## Contributors * [ smartestemail ](https://profiles.wordpress.org/smartestemail/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/smartest-email/)