SMTPing Email Suite: SMTP, Newsletter & Email Verification

WordPress sends email with PHP mail() by default. Most hosts are not set up for it, so password resets, WooCommerce orders and form notifications land in spam or never arrive. SMTPing Email Suite sends every WordPress email through a real SMTP server or an email API, and checks each recipient before the email leaves your site. Send through a real provider

• 12 mailers: Other SMTP (any server), Google / Gmail, Microsoft 365 / Outlook, Zoho Mail, Amazon SES, SendGrid, Mailgun, Postmark, Brevo, SparkPost, Resend and Elastic Email.
• Test connection: logs in to your SMTP server without sending an email and tells you exactly what is wrong: unknown host, blocked port, wrong encryption for the port, refused login or a temporary block after too many attempts.
• Backup connection: if the main mailer fails, a second one sends the email automatically.
• Sending queue and rate limit: emails are sent in the background, so pages load faster and you stay under your provider limits. Each email is retried up to 3 times.
• Sender control: force the from email and from name on every email, and send bounces back to your address.
• Passwords and API keys are encrypted in the database and never shown again.

Check recipients before sending Every recipient is checked with the SMTPing verification API before the email is sent. Invalid, spamtrap, disposable, blacklisted, complainer, spambot and full-inbox addresses are not sent, and neither are addresses that already bounced. You choose what happens: remove the risky recipient and send to the others, or do not send the email at all.

• 1 credit per new address, results are kept 30 days, so the same address is never paid twice in a month.
• Unknown results are never charged.
• Every SMTPing account gets 25 free credits per day.
• Without an API key, only addresses that already bounced are skipped.

See what happened to every email

• Dashboard: emails sent and failed, risky recipients removed, emails delivered by the backup, a chart over 7, 30 or 90 days, and which plugins send your email.
• Email log: subject, recipients, status, mailer and error for every email, with search, filters and CSV export. The email content is never stored. You choose how long the log is kept.
• Bounced addresses: the list of addresses rejected permanently by the receiving server.
• Domain health: SPF, DKIM, DMARC and MX checked live in your DNS.

Alerts Get an email, a Slack, Discord or Microsoft Teams message, or a JSON webhook when an email fails, when the backup connection takes over, or when the queue is stuck for more than 30 minutes. One alert per type every 15 minutes at most. Alert emails are sent with PHP mail(), so they can still arrive when your mailer is down. WP-CLI

• wp smtping status: mailer, queue, log and credits.
• wp smtping test you@example.com: send a test email.
• wp smtping queue run and wp smtping queue retry: process the queue now, or send failed emails again.
• wp smtping log --status=failed --format=csv: read the email log.
• wp smtping alert-test: send a test alert.

Deliverability check One click checks SPF, DKIM, DMARC, MX and blocklists for your sending domain, with a score and the exact fix for each issue. Forms Drag and drop builder with 25 field types, conditional logic, multi-step forms, entry preview and a math captcha. 17 ready-made templates, embedded forms and popups (delay, scroll, exit intent). Also connects to 31 form plugins, so signups from Contact Form 7, WPForms, Gravity Forms, Elementor and others join your lists. Newsletter and campaigns Lists, tags, double opt-in, a preference page and one-click unsubscribe. Emails are designed in the WordPress block editor, pasted as HTML or imported from a zip. Campaigns can be scheduled and report opens, clicks and unsubscribes. Newsletter features need WordPress 7.0 or later. Automation Welcome series, abandoned cart, new post and new product announcements, weekly digest, win-back, first order follow-up and review requests, built step by step with waits, conditions, tags and lists. Transactional emails A branded template for WordPress emails, your logo and color on WooCommerce emails, a dedicated connection for transactional email, smart routing rules, and a switch for every WordPress and WooCommerce notification. AI and MCP Write emails, subject lines and form copy with the AI provider connected to WordPress (WordPress 7.0+, Settings > Connectors). SMTPing registers its abilities with the WordPress Abilities API, so the official MCP Adapter plugin can let Claude, ChatGPT, Cursor or Codex read your email stats, logs, deliverability and newsletter data. SMTPing stores no AI key and runs no server of its own.

0.27.1

• Security: every SQL query now goes through $wpdb->prepare(), with %i for table and column names and placeholders for IN lists.
• Security: request data is sanitized on read (map_deep, wp_kses with an email HTML allowlist, sanitized $_FILES copies).
• Security: campaign unsubscribe counts are bound to a subscriber who actually received the campaign.

0.27.0

• AI writing now uses the WordPress AI Client (Settings > Connectors). No AI key is stored by the plugin.
• The built-in MCP endpoint is removed: AI agents connect through the WordPress Abilities API and the official MCP Adapter.
• Upgrading from SMTPing SMTP: the old plugin is no longer deactivated automatically, a notice offers a button instead.
• CSV import uses wp_handle_upload(). Emails with attachments skip the queue and are sent right away.
• Translations are delivered by translate.wordpress.org.
• New email preferences page with list descriptions and "Unsubscribe from all". The unsubscribe link now works in one click, with a Resubscribe button, and adds the person to an automatic "Unsubscribed" list.

0.26.0

• Email controls, smart routing and a help widget.
• Built-in MCP server and AI writing assistant (OpenAI, Anthropic, Google, xAI).
• Transactional templates and dedicated connection.
• Drag and drop form builder, automations, campaigns and deliverability check.

0.4.0

• New: alerts by email and webhook (Slack, Discord, Microsoft Teams, JSON) when an email fails, the backup takes over or the queue is stuck.
• New: WP-CLI commands: status, test, queue run, queue retry, log, alert-test.
• New: French translation.

0.3.2

• New: Test API key button, Save buttons next to each test, automatic save after a successful test.
• Changed: saved passwords and API keys are shown masked with a Remove button.

0.3.1

• New: Test connection button for SMTP mailers, with a clear reason for each failure.
• Changed: the sending queue is on by default; port and encryption stay in sync.

0.3.0

• New: dashboard, provider logos, provider filters and search, two-column email log.

0.2.0

• New: recipient check before sending, email log and bounced addresses.

0.1.0

• First version: 12 mailers, backup connection, sending queue and test email.