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On Review with WordPress.org

OD2 SMTP
& Mail Manager

Take full control of WordPress email delivery. Replaces the default server mailer with secure, AES-encrypted SMTP connection profiles, automatic failover servers, and delivery log auditing.

Version 1.0.0WordPress 5.8+PHP 7.4+GPL v2 Licensed100% Free

Under WordPress.org Review

This plugin has been submitted and is currently undergoing manual review by the WordPress plugin review team. You can sign up to download the zip file for self-hosted development.

Review ProgressOn Review
Request Beta AccessExplore Features
Unlimited
SMTP Profiles
Automatic
Failover Profiles
Unlimited
SMTP Logs
$0
Subscription Price

Engineered for 100% Reliable Email Delivery

Solve email delivery problems natively. No dependencies, no slow API integrations.

Multi-Profile SMTP Config

Configure multiple sender profiles with different hosts, ports, authentication methods, and sender emails. Assign priorities to dictate the active hierarchy.
Priority-based routingCustom port configSSL / TLS / STARTTLS supportMulti-profile database storage

Provider Presets

One-click templates for major SMTP providers, including Google/Gmail, Outlook/Office 365, Mailgun, SendGrid, and custom SMTP. Auto-populates standard server details.
Google OAuth readyOutlook API readySendGrid templatesMailgun configuration

Failover Fallback System

If the primary SMTP server is offline or times out, the engine automatically attempts delivery through the next prioritized active SMTP profile, guaranteeing mail gets sent.
Automatic retry loopProfile switching logsFailover notificationsFailover limits

Delivery Logs & Tracking

Keep track of every single email sent by WordPress. Logs include sender, recipient, subject, headers, delivery status (Success/Failed), and detailed connection errors.
Search by recipient/subjectStatus sortingConnection transcript capturePruning logs schedule

SMTP Connection Debugger

Send HTML test emails to any email address while viewing the raw PHP Mailer connection transcript in real-time. Easily identify authentication, SSL, and network handshake errors.
Raw connection transcriptsPort verification testsSSL certificate checksClear error parsing

Encrypted Keys & Credentials

All SMTP passwords, API keys, and client secrets are AES-256 encrypted using an environment-level site key before insertion in the database, avoiding plain-text storage.
AES-256 credential encryptionEnvironment key supportSalted database optionsNo plain-text storage

SMTP Provider Reference

Standard connection guidelines pre-configured into our quick setup tabs.

Gmail / Google Workspace
Ports: 465 (SSL) / 587 (TLS)
Auth: OAuth 2.0 / App Password
Outlook / Office 365
Ports: 587 (STARTTLS)
Auth: OAuth 2.0 / App Password
SendGrid
Ports: 465 (SSL) / 587 (TLS)
Auth: API Key
Mailgun
Ports: 465 (SSL) / 587 (TLS)
Auth: API Key / SMTP Credentials
Custom SMTP Server
Ports: Port 25 / 465 / 587
Auth: Plain / Login / MD5

Simple Installation

Configure secure email delivery in a few minutes.

1
Contact One Day Developers or download the zip archive from the releases page.
2
Go to Plugins → Add New → Upload Plugin and select `od2-smtp-manager.zip`.
3
Activate the plugin from the Plugins screen.
4
Navigate to OD2 SMTP in the admin menu.
5
Click 'Add New Profile', choose a provider preset or input your details, set priority to 1, and save.
6
Go to the Debug/Test tab and send a test email to verify the connection transcript is successful.

Changelog

Version history and release notes.

v1.0.0
Initial Public Release · Beta
On Review
  • Secure Multi-profile SMTP configuration panels
  • Built-in failover to secondary backup profiles when sending fails
  • SMTP provider presets for Gmail, Outlook, SendGrid, and Mailgun
  • Detailed connection log tracking with raw SMTP transcript debug console
  • AES-256 credential and password encryption

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Frequently Asked Questions

Common questions about OD2 SMTP Manager.

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