onetwothreesend

<p>One Two Three Send is a complete newsletter workflow inside WordPress. The plugin uses the Claude API (you supply the key) to draft issues from your site’s content, gives you inline AI editor tools to polish the copy, runs a pre-send audit to catch common mistakes, and sends through Resend or SMTP to subscribers stored in your own database.</p>
<h4>What’s included</h4>
<ul>
<li><strong>AI newsletter generator</strong> — Claude drafts a newsletter from your recent posts, site tagline, and a manual description you provide. Tone selector (Friendly / Professional / Casual / Authoritative) and length selector (~200, ~400, ~700 words).</li>
<li><strong>AI editor</strong> — select any paragraph and click Rewrite, Shorten, Expand, or Fix grammar. Generate 5 alternative subject lines in one click. Tone check, local spam-word scan.</li>
<li><strong>Pre-send audit</strong> — one click runs 10 checks: subject length, body word count, unsubscribe reference, link count, link format, spam triggers, placeholder leaks, readability (Flesch-Kincaid), read time, structural sanity. Each check returns pass / warn / fail with a plain-language explanation.</li>
<li><strong>Scheduling</strong> — manual, daily, weekly, fortnightly, monthly. Manual-approval mode emails the admin before any send. Auto-send is opt-in.</li>
<li><strong>Email delivery</strong> — Resend (API) or SMTP (any provider).</li>
<li><strong>Subscribers</strong> — local database with filtering, CSV export, one-click token-based unsubscribe.</li>
<li><strong>Signup forms</strong> — inline form via shortcode <code>[otts_form id="1"]</code>, Gutenberg block, or PHP <code>onetwothreesend_render_form(1)</code>.</li>
<li><strong>Welcome email</strong> — automatic, configurable subject and body with <code>{first_name}</code>, <code>{email}</code>, <code>{site_name}</code>, <code>{from_name}</code> placeholders.</li>
<li><strong>Lead magnet delivery</strong> — upload a PDF, zip, or any allowed file. New subscribers receive a signed, time-limited download link in the welcome email. Expired links auto-refresh when clicked, no manual resending.</li>
</ul>
<h4>External services</h4>
<p>This plugin calls the following external APIs using credentials you provide. No data is sent to any third party without you entering a key first.</p>
<ul>
<li><strong>Anthropic Claude API</strong> (<code>api.anthropic.com</code>) — for drafting and editing newsletters. You provide the API key in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> AI. Terms: https://www.anthropic.com/legal/consumer-terms. Privacy: https://www.anthropic.com/legal/privacy.</li>
<li><strong>Resend</strong> (<code>api.resend.com</code>) — optional, for email delivery. You provide the API key in Settings <span aria-hidden="true" class="wp-exclude-emoji">→</span> Email Provider if you choose Resend. Terms: https://resend.com/legal/terms-of-service. Privacy: https://resend.com/legal/privacy-policy.</li>
</ul>
<p>The plugin itself does not phone home. It does not contact onetwothreesend.com or any server other than the ones you explicitly configure above.</p>
<h4>Companion plugin</h4>
<p>A companion plugin (One Two Three Send Pro, distributed separately) can extend this with Stripe paywalls, Mailchimp / MailerLite / Brevo / ConvertKit providers, popup and slide-in forms, and more. One Two Three Send is fully functional on its own — the companion plugin is optional. <a href="https://onetwothreesend.com/pricing/" rel="nofollow ugc">Pricing and details</a>.</p>
<h4>Useful links</h4>
<ul>
<li><a href="https://onetwothreesend.com/features/" rel="nofollow ugc">Features overview</a> — full feature breakdown with screenshots.</li>
<li><a href="https://onetwothreesend.com/docs/" rel="nofollow ugc">Documentation</a> — setup walkthroughs and troubleshooting guides.</li>
<li><a href="https://onetwothreesend.com/pricing/" rel="nofollow ugc">Pricing</a> — free tier, monthly, annual, and founder plans for the companion newsletter and pro plugin.</li>
<li><a href="https://onetwothreesend.com/privacy/" rel="nofollow ugc">Privacy policy</a>.</li>
<li><a href="https://onetwothreesend.com/contact/" rel="nofollow ugc">Contact / support</a> — for questions the FAQ below doesn’t answer.</li>
</ul>


One Two Three Send

AI newsletters for WordPress. Draft with Claude, audit before sending, deliver via Resend or SMTP, manage subscribers — all from your admin.

Aur&eacute;lien Denis

Benjamin Denis

SEOPress

MailerPress Team

<p>MailerPress is a free email marketing and newsletter plugin for WordPress. Build professional email campaigns with a drag-and-drop editor, manage unlimited subscribers and lists, schedule newsletters, and send automated emails — all from your WordPress dashboard.</p>
<p>Whether you’re a blogger sending a weekly newsletter, an online store owner looking to customize WooCommerce emails (paid plan required), or a marketer running large-scale email campaigns, MailerPress gives you everything you need — with no subscriber limits and no sending restrictions.</p>
<span class="embed-youtube" style="text-align:center; display: block;"><iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/dDq0v-wdSUk?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe></span>
<h4>Drag-and-Drop Email Editor</h4>
<p>Create beautiful email newsletters without writing a single line of code. The MailerPress email editor is inspired by the WordPress Block Editor (Gutenberg), so it feels instantly familiar:</p>
<ul>
<li>Drag-and-drop blocks to build your email layout</li>
<li>Pre-built email templates to get started in seconds</li>
<li>Save and reuse your own custom layouts</li>
<li>Full theme.json support for consistent branding with Full Site Editing</li>
<li>Google Fonts integration with local hosting for fast loading</li>
<li>MJML template import for advanced email designs</li>
<li>Responsive emails that look great on every device</li>
</ul>
<h4>Subscriber Management & List Building</h4>
<p>Grow your email list with powerful subscriber management tools, completely free:</p>
<ul>
<li>Unlimited subscribers, lists, and tags — no restrictions</li>
<li>Customizable opt-in forms with shortcode — works with any page builder (Elementor, Bricks, Divi, and more)</li>
<li>Gutenberg opt-in form block for the Block Editor</li>
<li>Embeddable opt-in forms for external websites</li>
<li>Double opt-in with customizable confirmation emails</li>
<li>CSV import and export for easy subscriber migration</li>
<li>Advanced subscriber segmentation</li>
<li>GDPR-compliant subscription management with built-in unsubscribe</li>
</ul>
<h4>Email Campaigns & Newsletter Scheduling</h4>
<p>Send newsletters and email campaigns on your schedule:</p>
<ul>
<li>Create and send email campaigns to your subscriber lists</li>
<li>Schedule newsletters for future delivery</li>
<li>Merge tags for personalized email content (subscriber name, custom fields, and more)</li>
<li>Content retrieval from posts and pages</li>
<li>Flexible click and open tracking (track, anonymize, or disable)</li>
<li>Detailed campaign analytics and performance reports</li>
</ul>
<h4>Email Automation</h4>
<p>Automate your email marketing to save time and boost engagement:</p>
<ul>
<li>Automated post notification emails when you publish new content</li>
<li>Scheduled email campaigns with precise timing</li>
<li>Automated double opt-in confirmation follow-ups (paid plan required)</li>
<li>Advanced automation workflows with triggers and conditions (paid plan required)</li>
</ul>
<h4>WooCommerce Email Marketing (paid plan required)</h4>
<p>Turn your WooCommerce store into an email marketing machine:</p>
<ul>
<li>Design custom WooCommerce transactional emails with the drag-and-drop editor</li>
<li>Override default WooCommerce order confirmation, shipping, and account emails</li>
<li>Send promotional email campaigns to your customers</li>
<li>Retrieve WooCommerce product content directly in your newsletters</li>
<li>Segment subscribers based on purchase behavior</li>
</ul>
<h4>Incoming & Outgoing Webhooks</h4>
<p>Connect MailerPress to any external system:</p>
<ul>
<li>Incoming webhooks to add subscribers from external platforms</li>
<li>Outgoing webhooks to send real-time events to third-party services</li>
<li>Build custom integrations with your existing tools</li>
</ul>
<h4>Email Sending Options</h4>
<p>Send emails using your preferred method:</p>
<ul>
<li>PHP Mail (default — works out of the box)</li>
<li>Custom SMTP configuration</li>
<li>SendGrid integration (paid plan required)</li>
<li>Brevo / Sendinblue integration (paid plan required)</li>
<li>Mailjet integration (paid plan required)</li>
<li>Amazon SES integration (paid plan required)</li>
<li>Mailgun integration (paid plan required)</li>
<li>Postmark integration (paid plan required)</li>
<li>Bounce management via email provider APIs (paid plan required)</li>
</ul>
<h4>All Free Features</h4>
<ul>
<li>Drag-and-drop email editor inspired by WordPress Block Editor</li>
<li>Unlimited subscribers, lists, tags, and campaigns</li>
<li>Email newsletter creation and scheduling</li>
<li>Customizable opt-in forms (shortcode + Gutenberg block)</li>
<li>Double opt-in with confirmation emails</li>
<li>CSV import/export for subscriber migration</li>
<li>Subscriber segmentation</li>
<li>Email campaign analytics</li>
<li>Post and page content retrieval for newsletters</li>
<li>Incoming and outgoing webhooks</li>
<li>Click and open tracking (with anonymous option)</li>
<li>Merge tags for email personalization</li>
<li>MJML template import</li>
<li>Google Fonts with local hosting</li>
<li>GDPR-compliant with built-in unsubscribe</li>
<li>Self-hosted — your data stays on your server</li>
<li>Full theme.json and FSE support</li>
<li>Hundreds of developer hooks and filters</li>
<li>REST API for custom integrations</li>
</ul>
<h4>Paid Plan Features</h4>
<p>Upgrade to <a href="https://mailerpress.com/" rel="nofollow ugc">MailerPress</a> for advanced email marketing capabilities:</p>
<ul>
<li><strong>WooCommerce email customization</strong> — design and override transactional emails (order confirmation, shipping, account emails) with the drag-and-drop editor</li>
<li><strong>Professional email delivery</strong> — SendGrid, Brevo, Mailjet, Amazon SES, Mailgun, Postmark</li>
<li><strong>AI-powered email content</strong> — OpenAI, DeepSeek, Mistral, Google Gemini integration for content optimization and image generation</li>
<li><strong>Advanced form integrations</strong> — Contact Form 7, Gravity Forms, Fluent Forms</li>
<li><strong>Page builder integrations</strong> — Elementor, Bricks</li>
<li><strong>Advanced automation workflows</strong> — triggers, conditions, and behavioral targeting</li>
<li><strong>Custom fields and advanced segments</strong> — target subscribers based on behavior and data</li>
<li><strong>Premium email templates</strong> — professional designs ready to use</li>
<li><strong>Embed opt-in forms on external websites</strong> — grow your list beyond WordPress</li>
<li><strong>Bounce management</strong> — automatic handling via email provider APIs</li>
<li><strong>Automated double opt-in follow-ups</strong> — re-engage pending subscribers</li>
<li><strong>White-label options</strong> — customize MailerPress branding</li>
<li><strong>Priority support</strong> — dedicated customer assistance</li>
</ul>
<h4>Developer-Friendly</h4>
<p>MailerPress is built for developers who need full control:</p>
<ul>
<li><strong>Hundreds of hooks and filters</strong> — customize every aspect of the plugin</li>
<li><strong>REST API</strong> — build custom integrations and applications</li>
<li><strong>MJML support</strong> — use MJML templates for advanced email design workflows</li>
<li><strong>React-based architecture</strong> — modern, extensible, and performant</li>
</ul>
<h4>Privacy & GDPR</h4>
<p>MailerPress is fully GDPR-compliant and privacy-first. No data is collected by us — everything stays on your server. Built-in unsubscribe links, double opt-in, and data export tools help you stay compliant. When using third-party email providers, please review their respective privacy policies.</p>
<h4>Translations</h4>
<p>MailerPress is available in English, French, Spanish, Dutch, and Arabic. <a href="https://translate.wordpress.org/projects/wp-plugins/mailerpress/" rel="nofollow ugc">Help translate MailerPress</a> into your language.</p>
<h4>From the same team</h4>
<p><a href="https://wordpress.org/plugins/wp-seopress/" rel="ugc">Try SEOPress, the best SEO plugin for WordPress</a></p>


MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails


Je suis un utilisateur Pro de MailerPress et je dois dire que je suis très satisfait de cette extension. Le développement est rapide et le support très réactif. Je ne peux que la recommander !


Une excellente extension !


I've owned licenses for Noptin, Mailster, Newsletter, FluentCRM, and Jetpack CRM at various points. Most are collecting dust in my account. So when I say MailerPress is different, I'm saying it after burning money on plenty of alternatives and using MailerPress for about 6 straight months on a few client and my own personal sites.



Not everyone recognizes the importance of flexibility in writing emails and newsletters - and that's the first thing MailerPress offers. On Block Editor side Emails inherit theme.json colors and typography automatically, so my brand stays consistent without copying hex codes around. Setup wizard took under 3 minutes. SMTP through Emailit is configured in the same flow.



It's not perfect. But I am betting it is better than anything you can get for WordPress-native email marketing right now.


One of a Kind

Email marketing and newsletter plugin for WordPress. Create email campaigns, grow subscribers, automate emails, and customize WooCommerce emails.

One Two Three Send vs MailerPress – Email Marketing, Newsletter, Email Automation & WooCommerce Emails