Simple SMTP vs Smooth SMTP

Adds a simple, no-fuss SMTP settings to your WordPress installation that lets you define custom settings, which is especially useful for hosts with no control over the php mail functionality. If logging is enabled, a new segment in the settings panel will show up with a 30-day overview of recent emails, and will automatically prune older logs. Please see the FAQ if you want a more permanent solution. For more information, please see the project wiki on GitHub. Environment and constant overriding (optional) This plugin will prefer environmental and constant-stored values over the plugin-saved equivalent settings, making it easier to use this plugin via deployment. These can be either stored in your systems env setup, or in wp-config.php as define( 'SEE_BELOW', 'your_value_here' );. Accepted Parameters SMTP_HOST (string) Mail server hostname. SMTP_PORT (integer) Port address (usually 25, 465 or 587). SMTP_AUTH (integer, 1 or 0) Pass below credentials to your mail server. SMTP_USER (string) The mail username for this account. SMTP_PASS (string) The password for the mailer account. SMTP_FROM (string) Enforce all emails come from this email address. SMTP_FROMNAME (string) Enforce all emails to have a certain email name. SMTP_SEC (string) Use a particular email security method (accepts ‘def’ (default), ‘ssl’, ‘tls’ and ‘off’). SMTP_NOVERIFYSSL (boolean) Disable validation of the SMTP server certificate (not recommended). SMTP_LOG (boolean) Controls the logging capability and visibility. SMTP_DISABLE (boolean) Disables the mailer. They will still be logged if enabled, but won’t send out. It is recommended to store at least SMTP_PASS in your wp-config.php file (with the correct file permissions set). If the openssl extension is available, the plugin will attempt to encrypt the password in the database.

Smooth SMTP gives you full control over how WordPress sends email. Configure SMTP as your primary sending method, set up a fallback for when things go wrong, get notified through your preferred channels, and keep a detailed log of every email your site sends. Primary Sending Method (SMTP) Configure any SMTP provider as your primary sending method. If you leave SMTP disabled, WordPress will continue using its default PHP mail — either way, all other features still work. Works with any SMTP provider: Gmail, SendGrid, Amazon SES, Mailgun, and more Configurable host, port, encryption (SSL/TLS), username, password, from email, and from name Secure credential storage using WordPress’s built-in options API Fallback Sending Method If the primary sending method fails, Smooth SMTP can automatically retry using a fallback. This works regardless of whether you’re using SMTP or WordPress’s default PHP mail as your primary. Fallback to WordPress Default (PHP mail) or a second SMTP server Full credential configuration for the fallback SMTP Logged separately so you can see exactly which method delivered each email Failure Alert Channels Get notified the moment an email fails — through the channels your team already uses. Slack, Discord Telegram (via Bot API — requires bot token and chat ID) WhatsApp (via CallMeBot webhook) SMS or any custom webhook endpoint Add multiple channels, enable/disable each independently Send Test Alert button per channel Alerts are throttled to at most one per 60 seconds to avoid flooding Email Summary Reports Receive a periodic HTML email summarising your site’s email activity. Hourly, daily, weekly, or monthly schedule Total sent and failed counts, breakdown by sending method, and recent failures Configurable recipient address Send Summary Now button for an instant preview Email Logging Every email your site sends is logged with full detail. Status (success / failed), sender, recipients, subject, message body Sent Via column showing which method delivered the email (Primary SMTP, Fallback SMTP, Fallback WordPress Default, etc.) Search, filter, and paginate logs from the admin dashboard View full email detail in a modal Bulk delete, bulk resend, and delete-all options Admin dashboard notice when the most recent email failed Dashboard A at-a-glance overview of your site’s email activity. Total sent, failed, and success rate stat cards Breakdown by sending method with progress bars Recent failures table Filter by day, week, month, or all time Test Email Send a test email at any time to verify your configuration. Choose which sending method to test — primary or fallback — independently Send plain text or HTML test emails Specify any recipient address Always available regardless of whether SMTP is configured Other One-click import of email logs from Post SMTP Option to keep logs and settings when the plugin is deleted Compatible with Post SMTP and WP Mail SMTP (Smooth SMTP acts as a fallback when another SMTP plugin is detected) Privacy Policy This plugin logs email metadata including sender address, recipient addresses, subject line, message body, and sending status. SMTP credentials are stored in your WordPress database. No data is transmitted to external services except through the alert channels and SMTP servers you explicitly configure.