Custom SMTP vs Meow Mailer – Free SMTP, Everything Included

Make your WordPress email arrive WordPress still hands your email to the PHP mail() function. Most hosts have switched it off or throttled it because spammers loved it, and where it still runs, unauthenticated mail lands in spam. If your contact form says thank you and nothing ever arrives, this is why. Custom SMTP sends your email through the provider you already use instead: your host’s SMTP server, Gmail, Outlook, Brevo, SendGrid, Mailgun, Postmark or the Amazon SES API. It logs every message with its outcome, lets you preview and resend failures, and alerts you when sending spikes or starts failing. Everything is in the free plugin: no account to create, no third-party relay, no pro version. Built for modern WordPress: WordPress 7.0 ready, PHPMailer 7.0.2 compatible, stateless / cloud-ready (Docker, Kubernetes), and fully translated in English and French. Documentation lives at customsmtp.com/docs/, with step-by-step guides for twelve providers and a developer guide covering constants, environment variables and the Amazon SES API. Send through your own SMTP provider Point the plugin at the server you already pay for or the free tier you already use, with a preset that fills the technical values for you: Presets for twelve providers: Gmail, Outlook, Amazon SES, SendGrid, Mailgun, Brevo, Postmark, Mailjet, Zoho, Yahoo, iCloud and Scaleway, plus “Other / Custom” for any SMTP server. From Name and From Email applied to every outgoing email, with optional Reply-To, CC and BCC. SSL/TLS encryption, and optional authentication for relay servers that need none. Password encrypted at rest (AES-256-CBC with your WordPress salts), never displayed back in the form. Test without guessing: test the SMTP connection without sending anything, or send yourself a real test email. A log of every email, with preview and resend Never wonder if your emails were sent again. Logging works out of the box and captures every message going through wp_mail(): WooCommerce order notifications, contact form submissions, password resets, all of it. Delivery status (sent or failed) with the exact SMTP error when a message fails, and the stored headers for advanced troubleshooting. Preview the email body in wp-admin, in an Outlook-style sidebar, without sending anything again; view the HTML source, or download any email as an HTML file for archiving. Resend a failed email straight from the logs once your configuration is fixed. Search by recipient, subject or status; filter by date range; export to CSV for reporting and compliance. Configurable retention with automatic purge (30 days by default), and content storage you can switch off in one click. Unusual Usage Alerts A compromised contact form or a runaway plugin can turn your site into a spam relay, and a revoked password or an exhausted provider quota can stop your emails silently. Custom SMTP watches for both and warns you. Sending spikes — get an email when more messages than expected go out within an hour or a day. Thresholds are absolute, never relative, so a quiet site that sends a handful of emails a week is never woken up by statistical noise. Delivery failures — get warned as soon as several emails fail in a row, or when too many of the last messages sent failed. Counted over the last emails sent rather than over a period of time, so it works just as well on a site that sends twice a week as on a busy store. A channel that survives the outage — alerts go out by email, to an optional HTTPS webhook (Slack, Teams, any JSON endpoint), and to a persistent notice in wp-admin, because the one moment you need the alert is the moment email itself is broken. No noise — a configurable cooldown keeps an ongoing incident from filling your inbox, and the alert email is never logged nor counted against your own thresholds. Off by default — turn it on in Settings and set the thresholds that match your site. Manage WordPress Notifications WordPress sends a handful of emails on its own, and some of them get old fast: a notice to the administrator every single time a user resets their password, a report after every automatic plugin update, a message for every comment awaiting moderation. Switch off the ones you do not want, one checkbox each, no code. Password reset and new user notices to the administrator — the user still gets their reset link and their welcome email, only the copy to the admin stops. Automatic update reports — core, plugins and themes, separately. Comment notifications — awaiting moderation, and new comment to the post author. Nothing is hidden from you — a notification you switch off is never created, so it will not appear in the Email Logs either, and the screen tells you that. Account recovery is never at risk — the emails users need to regain access to their account are deliberately out of reach of this screen. Off means off, on stays on — installing or updating the plugin never silences an email your site was already sending. Deliverability, privacy, security Cooperates with the automatic Envelope-From / Return-Path behavior introduced in WordPress 6.9, which improves SPF, DKIM and DMARC alignment on strict hosts (Amazon SES, Postmark, etc.). UTF-8 and emoji handled end-to-end in subjects, bodies and headers. All data stays in your WordPress database: no third-party calls, no telemetry, and no external processor to declare in your GDPR records. Email preview rendered in a sandboxed iframe, so no JavaScript from a logged email ever runs in wp-admin. All admin actions protected with nonces and capability checks; the SMTP password is encrypted at rest. For developers: containers, config-as-code, Amazon SES API The developer guide covers this surface in depth; the short version: Stateless and cloud-ready: no filesystem writes, no shared storage, safe on read-only filesystems. Works on Docker, Kubernetes, AWS ECS/Fargate, Google Cloud Run, and with Bedrock or Trellis stacks. Every setting from a constant or environment variable: define CUSTOM_SMTP_ and it overrides the saved value everywhere, with the field shown read-only in wp-admin and a badge naming the variable. On Multisite, a network-wide option can configure every site at once. Amazon SES API with IAM roles: send through the SESv2 API authenticated by your ECS task role or EC2 instance role, with no access keys and no stored credentials. Raw MIME preserves HTML, attachments, CC/BCC, Reply-To and custom headers, and it works with or without the AWS SDK for PHP. Details in the FAQ below. Abilities API (WordPress 6.9+): custom-smtp/connection-health and custom-smtp/send-test-email are exposed to MCP-enabled AI assistants and automation tools (n8n, Make), behind the same manage_options capability check as wp-admin.

For years, almost every WordPress site I ran ended up with a different plugin just to send email. I never really chose them. I installed whatever looked fine at the time, because honestly there is no clear winner. Most of them advertise features I don’t need, or hide the basics behind a paywall. At one point I simply wanted to see the emails my site had sent, or failed to send, and even that asked me to upgrade. That felt wrong. So I decided to build the simplest and most honest email plugin I could for WordPress. You pick one provider, set it up once, and every email your site sends goes through it. Everything is logged, so you always know what happened. No upsell maze, no ads, nothing basic locked away. That is Meow Mailer, and all of this is free: One provider, set up once. Pick the one you use and forget about it. No confusing multi provider routing. Import from your current SMTP plugin. Already set up with WP Mail SMTP or Easy WP SMTP? Meow Mailer notices and copies the provider, credentials and sender over in one click, so switching never means digging out your API keys again. A fallback for when it breaks, free. Name a second provider (or plain WordPress, which needs no setup) and it steps in only when the first one refuses an email. Your mail still goes out, the log tells you exactly who failed and why, and an alert lets you know your main provider needs a look. A real email log, free. Every email in a clean table with recipient, subject, provider and status (sent, failed, offline, pending). Click any row to read the full message, see the error, and resend it. Many plugins charge for this. Here it is free. Stays out of the way. Until you pick a provider, Meow Mailer doesn’t change how your email is sent, so activating it never breaks what already works. It still logs everything WordPress sends on its own, so you get the log from the moment you activate it. Never miss a failure. A dashboard warning appears when emails fail, so silent problems don’t go unnoticed. Dismiss it once you have had a look and it stays away until a new email fails. Failure alerts by email, free. Get told when your site stops being able to send, instead of finding out from a customer. The alert is sent by WordPress itself rather than your provider, so it still reaches you when the provider is the thing that broke. One alert per hour at most, however many emails fail. Alerts on Slack, Discord or Teams, free. Paste a webhook URL and the alerts and the weekly summary are posted to your chat as well, so finding out that email is broken never depends on email. Handy when you look after a lot of sites. Individual emails are never posted anywhere: this tells you about your site, not about the people it writes to. Weekly summary, free. A short email with what was sent, what failed, and the most common errors. Nothing is sent on a quiet week. Control WordPress’s own emails. Switch off the notifications WordPress sends by itself: new user registrations, password and email change confirmations, comment moderation, automatic update reports. Password resets are never affected, so nobody gets locked out. Background sending. Email goes out after the page has loaded, so your visitors never wait on the mail server. Offline mode. Capture every email in the log without sending. Perfect for staging and development. Filters and export. Filter by status and provider, search by subject or recipient, and export to CSV. Test and resend. Check your setup with an HTML or plain text test, and resend any logged message in one click. Auto prune. Keep logs forever, or delete anything older than 7, 30 or 90 days. Multisite ready. Set your provider up once on the main site and let every site of the network use it, or leave each site to configure its own. Email logs always stay per site. Light and private. No bloat, no tracking. Your credentials can live in wp-config.php instead of the database. What Meow Mailer will never do No open or click tracking. Other email plugins advertise it as a premium feature. It works by putting an invisible pixel in every message and rewriting every link to pass through a redirect, which means logging when your recipients read their mail and what they clicked. That is surveillance of the people your site writes to, it is personal data you then have to account for under the GDPR, and rewritten links make your email look more like spam, not less. Meow Mailer does not do it, and that is not a gap waiting to be filled in a Pro version. There is no Pro version. Supported providers Generic SMTP, Mailgun, Brevo, SendGrid, Amazon SES, Postmark, SMTP2GO, Mailjet, Resend, MailerSend, Maileroo, Gmail / Google Workspace (OAuth 2.0), Microsoft 365 / Outlook (OAuth 2.0), and Zoho Mail (OAuth 2.0). About Meow Apps Meow Mailer is part of the Meow Apps family of plugins, focused on doing one thing well with a clean, modern interface. External services Meow Mailer contacts an external service only after you choose and configure an email provider. Until then (the default “None”) and in “Offline” mode, it sends nothing anywhere. When you pick a provider, your outgoing email (recipients, subject, body, headers and attachments) and the credentials you entered are sent to that provider so it can be delivered, and only when your site actually sends an email. For Gmail, Microsoft 365 and Zoho Mail, Meow Mailer also contacts their OAuth servers when you connect and refresh your account. Nothing else is ever sent. You choose a single provider. Generic SMTP talks only to the server you configure. For the others, please review their terms and privacy policy: Mailgun (terms, privacy), Brevo (terms, privacy), SendGrid (terms, privacy), Amazon SES (terms, privacy), Postmark (terms, privacy), SMTP2GO (terms, privacy), Mailjet (terms, privacy), Resend (terms, privacy), MailerSend (terms and privacy), Maileroo (terms, privacy), Gmail (terms, privacy), Microsoft 365 (terms, privacy), and Zoho Mail (terms, privacy). Development Meow Mailer is open source. The full source, including the React code used to build the admin interface, lives on GitHub.