WP Manifestindependent plugin directory
manifest / email / flow-smtp

FlowSMTP

FlowSMTP — a modern WordPress SMTP plugin with email logging, failed-email tracking & resend, and a built-in test email system.

by Joytirmoy Halder Joyti · github.com/joytirmoy-halder/flow-smtp · website

★ 0stars

Install

Download source zip No release zip yet

This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.

Install straight from GitHub with WP-CLI:

wp plugin install https://github.com/joytirmoy-halder/flow-smtp/archive/refs/heads/develop.zip
No built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.
Readme github.com/joytirmoy-halder/flow-smtp ↗

A modern SMTP plugin for WordPress with email logging, failed-email tracking & resend, and a built-in test email system — wrapped in a sleek, clean admin UI.

✨ Features

  • SMTP delivery — routes all wp_mail() traffic through your SMTP server via phpmailer_init (host, port, TLS/SSL/none, authentication).
  • Email logs — every outgoing email is recorded in a custom database table with recipient, subject, body, headers, attachments and timestamps.
  • Failed emails — a dedicated tab listing failed sends with the exact SMTP error message, plus one-click Resend with retry counting.
  • Test email system — send an HTML or plain-text test email from the admin and see the real server response instantly.
  • Force From address/name — override the default wordpress@ sender across all plugins.
  • Log retention — automatic daily cleanup after a configurable number of days (0 = keep forever).
  • Dashboard stats — sent / failed / pending counters in the header.
  • Modern UI — gradient header, pill badges, toggle switches, searchable log table, detail modal, pagination.
  • Security minded — capability checks, nonces on every AJAX action, sanitized inputs, prepared SQL statements, obfuscated stored password.

📦 Installation

  1. Download this repository as a ZIP (or clone it into wp-content/plugins/flow-smtp).
  2. Activate FlowSMTP from Plugins in wp-admin.
  3. Go to FlowSMTP → Settings, enter your SMTP credentials and save.
  4. Open FlowSMTP → Send Test and send yourself a test email.

🗂 Structure

flow-smtp/
├── flow-smtp.php                   # Bootstrap, constants, activation (log table)
├── uninstall.php                   # Removes options + log table on uninstall
├── includes/
│   ├── class-flowsmtp.php          # Core loader / settings accessor
│   ├── class-flowsmtp-mailer.php   # phpmailer_init SMTP config, From filters, test email
│   ├── class-flowsmtp-logger.php   # Log table CRUD, failure capture, resend, retention
│   └── class-flowsmtp-admin.php    # Admin page (Settings / Logs / Failed / Test) + AJAX
└── assets/
    ├── css/admin.css               # Modern admin styling
    └── js/admin.js                 # Test email, resend, view modal, bulk delete

🔒 Security notes

  • The SMTP password is stored obfuscated (salt-XOR + base64), not in plain text. For maximum security, define credentials in wp-config.php and filter the option instead.
  • All admin actions require manage_options and a valid nonce.
  • All queries use $wpdb->prepare().

🧭 Roadmap

  • [ ] Provider presets (Gmail, Outlook, SendGrid, Mailgun, Brevo…)
  • [ ] Weekly email delivery summary
  • [ ] Automatic retry queue for failed emails (cron-based)
  • [ ] Export logs as CSV
  • [ ] Multisite support

📄 License

GPL-2.0-or-later. Built by Joytirmoy Halder Joyti.