SendForce Mail SMTP Relay – SMTP and vs YaySMTP – WP Mail SMTP with

SendForce Mail Relay is a free, open-source WordPress SMTP and email-API plugin that fixes the “WordPress emails not being delivered” problem. Send WooCommerce order emails, Contact Form 7 / WPForms / Gravity Forms submissions, password resets, registration confirmations, and any other wp_mail() traffic through Amazon SES, SendGrid, Mailgun, Brevo (Sendinblue), Postmark, Zoho ZeptoMail, Gmail API, Microsoft 365, or any standard SMTP server — with full email logging, queue, retry, and failure alerts. Why SendForce Mail Relay Free and open-source. Every feature is included — no premium tier, no email-volume cap, no provider paywall. 24+ providers, one plugin. Built-in presets and HTTP API integrations for major transactional email services — pick what fits your budget, deliverability needs, and region. Built-in debugging. Live SMTP debug log on test email, raw API request/response capture in the email log, “Copy Debug Info” button for support tickets, and WP-CLI commands. Designed for developers and agencies who need to diagnose email problems fast. Multiple connections with automatic fallback. Configure a primary connection (e.g. Amazon SES) plus a fallback (e.g. Mailgun). If the primary returns an error, the fallback takes over — no email lost. Supported email providers HTTP API sending (recommended — faster and more reliable than SMTP): Amazon SES (AWS Simple Email Service) SendGrid (by Twilio) Mailgun (by Sinch) Brevo (formerly Sendinblue) SparkPost Postmark Zoho ZeptoMail Microsoft 365 / Outlook (Microsoft Graph API) Gmail / Google Workspace (Gmail API) SMTP2GO SMTP.com Elastic Email SocketLabs Moosend SendLayer Mailjet MailerSend Mandrill (by Mailchimp) Resend Netcore Email API (formerly Pepipost) SMTP sending (works with any provider, including custom servers): Gmail / Google Workspace SMTP (smtp.gmail.com) Microsoft 365 / Outlook SMTP (smtp.office365.com) Yahoo Mail SMTP Zoho Mail SMTP Turbo SMTP Any other SMTP server (host, port, username, password) Features Multiple connections with automatic fallback — configure a primary connection (e.g. Amazon SES) plus a fallback (e.g. Mailgun, SMTP, or PHP mail). If the primary returns an error, the fallback is attempted automatically. Both attempts are logged so you have a full audit trail; recovered emails carry a “Recovered via fallback” badge in the log detail view. Smart Routing Rules — send different emails through different connections based on rules you define. Match by recipient domain, recipient pattern (glob), sender email or domain, source plugin (auto-detected for WooCommerce, Contact Form 7, WPForms, Gravity Forms, Ninja Forms, Fluent Forms, Forminator, Easy Digital Downloads, MemberPress, LearnDash, MailPoet, BuddyPress, bbPress and more), subject contains, time of day, or weekday. Rules are evaluated top-down (first match wins) and can target a single connection, a round-robin pool, or WordPress phpmail(). Includes inline rule editor, master enable/disable toggle, “Test Routing” tool, and a “via rule:” badge on the Email Log so you can see exactly which rule fired for any send. One-click provider presets — pre-filled host, port, encryption, and API endpoint for every supported provider. Just paste your API key or password. Email Log — every outgoing email logged with status, recipient, subject, headers, error message, and timestamp. Filter by status, search by keyword, filter by date range, export to CSV or JSON. Email Queue with retry — queue mode prevents rate-limit errors and timeouts on bulk sends. Failed emails auto-retry on exponential backoff (5 min → 15 min → 45 min). Email Test page — send a test email with live SMTP debug log output. Diagnose connection problems instantly. Failure alerts — push delivery failures to Telegram, Slack, Discord, Microsoft Teams, Google Chat, Pushover, or any custom webhook. Sender Identity override — force every email to use a custom From name and From address site-wide. Conflict detection — warns you if another SMTP plugin (WP Mail SMTP, FluentSMTP, Easy WP SMTP, Post SMTP, etc.) is active so you can deactivate it before things break. Encrypted credential storage — SMTP passwords and API keys are encrypted at rest using AES-256-CBC with a dedicated per-site key, so they survive security-key/salt regeneration. WP-CLI commands — wp sendforce test, wp sendforce queue process, wp sendforce log list, wp sendforce sysinfo. Developer hooks — sendforce_before_send, sendforce_after_send, sendforce_log_entry, sendforce_api_request, sendforce_api_response for extending the plugin without forking. WP_DEBUG_LOG integration — optional mirroring of SMTP and API debug output to debug.log. Automatic log cleanup — configurable retention period (default 30 days). Privacy-friendly — optional disable of email-body logging for GDPR / privacy compliance. Multisite compatible. Works with all major WordPress plugins SendForce Mail Relay hooks into WordPress’s core wp_mail() function, so it works with every plugin that sends email — including WooCommerce, Easy Digital Downloads, Contact Form 7, WPForms, Gravity Forms, Ninja Forms, Fluent Forms, Forminator, MemberPress, LearnDash, BuddyPress, bbPress, MailPoet (transactional), and any custom plugin or theme that uses wp_mail(). External Services SendForce Mail Relay is an email-delivery plugin. It does NOT connect to any external service automatically. A connection is made ONLY after you explicitly configure a provider and either (a) WordPress sends an outgoing email, or (b) you click “Send Test Email”, or (c) you enable a notification channel and an email-failure alert is dispatched. For each configured email provider, the data sent on every send is the same set of fields WordPress would otherwise hand to the local mail() function: the recipient address(es), CC, BCC, Reply-To, From name/address, subject, message body, headers, and attachments. No additional telemetry or analytics is transmitted by this plugin. For each configured notification channel (Telegram, Slack, Discord, Microsoft Teams, Google Chat, Pushover, custom Webhook), the data sent is a short status message you compose in the plugin (default: failed-delivery summary or daily summary). Email-delivery providers (configurable in Settings → Connections) SendGrid (by Twilio) * Service: https://sendgrid.com * When data is sent: every WordPress email when SendGrid is the active connection, plus on test-email click. * Endpoint: https://api.sendgrid.com/v3/mail/send * Privacy Policy: https://www.twilio.com/en-us/legal/privacy * Terms of Service: https://www.twilio.com/en-us/legal/tos Mailgun (by Sinch) * Service: https://www.mailgun.com * When data is sent: same as above, but to Mailgun. * Endpoint: https://api.mailgun.net/v3/{domain}/messages (US) or https://api.eu.mailgun.net/v3/{domain}/messages (EU). * Privacy Policy: https://www.mailgun.com/legal/privacy-policy/ * Terms of Service: https://www.mailgun.com/legal/terms/ Amazon SES (AWS Simple Email Service) * Service: https://aws.amazon.com/ses/ * When data is sent: same. * Endpoint: https://email.{region}.amazonaws.com/v2/email/outbound-emails (region you select). * Privacy Policy: https://aws.amazon.com/privacy/ * Terms of Service: https://aws.amazon.com/service-terms/ Brevo (formerly Sendinblue) * Service: https://www.brevo.com * Endpoint: https://api.brevo.com/v3/smtp/email * Privacy Policy: https://www.brevo.com/legal/privacypolicy/ * Terms of Service: https://www.brevo.com/legal/termsofuse/ SparkPost * Service: https://www.sparkpost.com * Endpoint: https://api.sparkpost.com/api/v1/transmissions * Privacy Policy: https://www.sparkpost.com/policies/privacy/ * Terms of Service: https://www.sparkpost.com/policies/tou/ Postmark * Service: https://postmarkapp.com * Endpoint: https://api.postmarkapp.com/email * Privacy Policy: https://postmarkapp.com/privacy-policy * Terms of Service: https://postmarkapp.com/terms-of-service Elastic Email * Service: https://elasticemail.com * Endpoint: https://api.elasticemail.com/v4/emails * Privacy Policy: https://elasticemail.com (linked from the site footer; Elastic Email does not publish a stable deep-link URL) * Terms of Service: https://elasticemail.com (linked from the site footer; Elastic Email does not publish a stable deep-link URL) SMTP2GO * Service: https://www.smtp2go.com * Endpoint: https://api.smtp2go.com/v3/email/send * Privacy Policy: https://www.smtp2go.com/privacy/ * Terms of Service: https://www.smtp2go.com/terms/ Netcore Email API (formerly Pepipost) * Service: https://netcorecloud.com * Endpoint: https://emailapi.netcorecloud.net/v5/mail/send * Privacy Policy: https://netcorecloud.com/privacy-policy * Terms of Service: https://netcorecloud.com (request the latest terms via the contact form on the homepage; Netcore does not publish a stable terms-of-use URL). SMTP.com * Service: https://www.smtp.com * Endpoint: https://api.smtp.com/v4/messages * Privacy Policy: https://www.smtp.com/policies/privacy-policy/ * Terms of Service: https://www.smtp.com/legal/terms/ SocketLabs * Service: https://www.socketlabs.com * Endpoint: https://inject.socketlabs.com/api/v1/email * Privacy Policy: https://www.socketlabs.com/legal/privacy-policy/ * Terms of Service: https://www.socketlabs.com/legal/ Moosend (by Sitecore) * Service: https://moosend.com * Endpoint: https://api.moosend.com/v3/ * Privacy Policy: https://moosend.com/privacy-policy/ * Terms of Service: https://moosend.com/terms/ SendLayer * Service: https://sendlayer.com * Endpoint: https://console.sendlayer.com/api/v1/email * Privacy Policy: https://www.sendlayer.com/privacy-policy/ * Terms of Service: https://www.sendlayer.com/terms-of-service/ Mailjet (by Sinch) * Service: https://www.mailjet.com * Endpoint: https://api.mailjet.com/v3.1/send * Privacy Policy: https://sinch.com/legal/privacy-notice/ * Terms of Service: https://sinch.com/legal/ MailerSend * Service: https://www.mailersend.com * Endpoint: https://api.mailersend.com/v1/email * Privacy Policy: https://www.mailersend.com/legal/privacy-policy * Terms of Service: https://www.mailersend.com/legal/terms-of-use Mandrill (by Mailchimp) * Service: https://mailchimp.com/developer/transactional/ * Endpoint: https://mandrillapp.com/api/1.0/messages/send.json * Privacy Policy: https://mailchimp.com/legal/privacy/ * Terms of Service: https://mailchimp.com/legal/terms/ Resend * Service: https://resend.com * Endpoint: https://api.resend.com/emails * Privacy Policy: https://resend.com/legal/privacy-policy * Terms of Service: https://resend.com/legal/terms-of-service Zoho ZeptoMail * Service: https://www.zoho.com/zeptomail/ * Endpoint: https://api.zeptomail.com/v1.1/email * Privacy Policy: https://www.zoho.com/privacy.html * Terms of Service: https://www.zoho.com/zeptomail/terms.html Microsoft 365 / Outlook (Microsoft Graph API and SMTP) * Service: https://www.microsoft.com/microsoft-365 * Endpoint (API): https://graph.microsoft.com/v1.0/users/{user}/sendMail (OAuth token from https://login.microsoftonline.com/{tenant}/oauth2/v2.0/token) * Endpoint (SMTP): smtp.office365.com:587 * Privacy Policy: https://privacy.microsoft.com/en-US/privacystatement * Terms of Service: https://www.microsoft.com/en-us/servicesagreement/ Gmail / Google Workspace (Gmail API and SMTP) * Service: https://workspace.google.com * Endpoint (API): https://gmail.googleapis.com/gmail/v1/users/me/messages/send (OAuth token from https://oauth2.googleapis.com/token) * Endpoint (SMTP): smtp.gmail.com:587 * Privacy Policy: https://policies.google.com/privacy * Terms of Service: https://policies.google.com/terms Notification channels (configurable in Settings → Alerts) These services are contacted ONLY when a notification channel is enabled AND a delivery failure (or daily-summary) event triggers an alert. The data sent is the short status text shown in the plugin’s alert preview. Telegram (Bot API) * Service: https://telegram.org * When data is sent: when a Telegram channel is enabled, a failed-delivery alert or daily-summary alert is generated. * Endpoint: https://api.telegram.org/bot{token}/sendMessage * Privacy Policy: https://telegram.org/privacy * Terms of Service: https://telegram.org/tos Pushover * Service: https://pushover.net * Endpoint: https://api.pushover.net/1/messages.json * Privacy Policy: https://pushover.net/privacy * Terms of Service: https://pushover.net/terms Slack (Incoming Webhooks) * Service: https://slack.com * Endpoint: the webhook URL you paste (https://hooks.slack.com/services/…). * Privacy Policy: https://slack.com/trust/privacy/privacy-policy * Terms of Service: https://slack.com/legal Discord (Webhooks) * Service: https://discord.com * Endpoint: the webhook URL you paste (https://discord.com/api/webhooks/…). * Privacy Policy: https://discord.com/privacy * Terms of Service: https://discord.com/terms Microsoft Teams (Incoming Webhooks) * Service: https://www.microsoft.com/microsoft-teams/ * Endpoint: the Teams webhook URL you paste. * Privacy Policy: https://privacy.microsoft.com/en-US/privacystatement * Terms of Service: https://www.microsoft.com/en-us/servicesagreement/ Google Chat (Incoming Webhooks) * Service: https://chat.google.com * Endpoint: the Google Chat webhook URL you paste. * Privacy Policy: https://policies.google.com/privacy * Terms of Service: https://workspace.google.com/terms/premier_terms.html Custom Webhook * When data is sent: when a custom Webhook channel is enabled and an alert is generated, a JSON payload is POSTed to the URL you paste. * Endpoint: the URL you paste. * Privacy Policy / Terms: governed by the operator of the URL you provide. Bundled third-party libraries (no network call) Chart.js (https://www.chartjs.org) — bundled locally at assets/js/chart.umd.min.js (v4.5.0). Used to render the email-stats chart on the dashboard. Loaded entirely from your own server; no CDN call is made. Privacy Policy SendForce Mail Relay stores the following data in your WordPress database: Email logs (if logging is enabled): recipient email address, subject, headers, email body (optional), sent status, error messages, and timestamps. Email queue (if queue is enabled): same data as above, plus retry attempt count and next retry time. Plugin settings: your SMTP host, port, username, and encrypted password or API key. Email body logging can be disabled in Settings > Queue & Logging. Log entries are automatically deleted after the configured retention period (default: 30 days). All data is deleted when the plugin is uninstalled. We recommend adding a note to your site’s privacy policy if you log email content, informing users that outgoing email metadata may be stored.

YaySMTP fixes your WordPress email deliverability and gives you something most free SMTP plugins make you pay for: full email tracking, reporting, and log management, 100% free. 💎 Connect your favorite mailer in 3 steps, then actually see what happens to every email: who opened it, who clicked, how your sending trends over time, and what failed. Every feature below is free. YaySMTP Pro adds only priority support and feature-request access, never a feature paywall. Why YaySMTP over other free SMTP plugins? Other free SMTP plugins get your mail delivered. YaySMTP gets it delivered and shows you what happened & what’s next: 📊 Email open & click tracking Know which transactional and marketing emails actually get read. 📈 Email Reports with charts & statistics Visualize your sending over time: delivery volume, opens, and clicks in clear charts, so you can spot trends and catch problems early. No paid analytics add-on required. 📁 Export email logs to CSV Keep auditable backups of everything you’ve sent. Filter, search, show/hide columns. ♻️ Import email logs from your old plugin Switching from WP Mail SMTP, Easy WP SMTP, and others brings your email history with you, not just your settings. 🛒 WooCommerce email preview & test Preview and send real WooCommerce order emails before customers see them. 🗓️ Configurable log retention Keep logs forever or 7 to 365 days, plus weekly/monthly summary reports, totally free. ⚡️ Core Features Email Reports & analytics: Track email performance over time with built-in charts and statistics, including sent volume, open rates, and click activity at a glance. Full email log: Keep all email logs with content and metadata. Filter, show/hide columns, and search by subject, recipient, and more. Open & click tracking: See which emails are opened and which links are clicked. Export/Import email logs: Save sent emails as CSV; import logs from your previous SMTP plugin. Configurable log retention: Keep logs forever or auto-retain within the latest 7 to 365 days. Weekly/monthly summary reports: Get email performance digests delivered to your inbox. WooCommerce optimized: Send and preview real WooCommerce transactional emails; works perfectly with YayMail. Fallback mailer, send test email, disable email delivery (dev mode), one-click migration, clean UI/UX. 💪 Supported Mailer YaySMTP supports mailers many other plugins skip, including MailJet, SMTP.com, SendPulse, Mandrill (Mailchimp), Yournotify, and IONOS, alongside Amazon SES, SendGrid, Gmail, Outlook/Office 365, Mailgun, Brevo, Zoho, Postmark, and any custom SMTP. SendGrid Gmail SMTP server Zoho Brevo (formerly Sendinblue SMTP) Mailgun SMTP.com Amazon SES Postmark MailJet MessageBird (formely Sparkpost) Pepipost SendPulse Microsoft Outlook, Office 365, Microsoft Exchange Online Mandrill SMTP by Mailchimp Yournotify IONOS Your hosting’s email server And more! Contact us to suggest your favorite mailer 🎯 Why use YaySMTP? Customers who buy products from your website expect regular updates and follow-ups. That’s why timely communication is crucial to your business. Sending follow-up WordPress emails on time can bring customers back while building trust and brand value. 📝 Documentation and Support If you’re having issues, do let us know, and we’ll be happy to help. ♥️ Like this YaySMTP Plugin? 👉 Rate us 5 stars on WordPress.org. ✅ Check out our best-selling WordPress plugins: YayMail – WooCommerce Email Customizer Email Customizer Addons YayCurrency – WooCommerce Multi-Currency Switcher YayPricing – WooCommerce Dynamic Pricing And Discounts YayExtra – WooCommerce Extra Product Options YaySwatches – Variation Swatches for WooCommerce ✅ Plugins to boost conversions and increase AOV in WooCommerce: YayReviews – Advanced Customer Reviews with AI Summary ✨ YayBoost – Sales Booster for WooCommerce Yay Wholesale B2B