Description
WebDig.DEV SMTP gives WordPress administrators direct control over outgoing email without requiring a remote setup wizard or a third-party configuration service.
SMTP credentials are stored on the WordPress installation and are used to configure WordPress email delivery. The plugin supports a primary SMTP transport and an optional backup transport for automatic failover.
Main features
- Primary SMTP transport.
- Optional backup SMTP transport.
- Automatic failover for temporary delivery problems and, when enabled, authentication failures.
- Persistent database-backed retry queue when delivery is temporarily unavailable, with administrative handling of uncertain and abandoned messages.
- Configurable hourly and daily recipient limits with MySQL concurrency protection.
- Configurable maximum recipients per message.
- Local delivery log with Delivery ID, transport, status and recipient addresses.
- SMTP test tool with Primary, Backup and simulated failover modes.
- SPF, DKIM, DMARC and BIMI checks for the configured From Email domain.
- SMTP transport DNS and SPF diagnostics.
- Automatic DKIM selector discovery with optional manual selector override.
- Password fields can be left blank when saving settings to preserve the existing password.
- Shared WebDig.DEV administration menu architecture for WebDig.DEV plugins.
Privacy by design
WebDig.DEV SMTP does not require an external setup wizard and does not send SMTP credentials to WebDig.DEV for configuration.
When local logging is enabled, delivery information can include recipient email addresses, delivery status, transport information and error messages. Administrators can disable logging and configure how many log entries are retained.
The optional mail-tester.com link displayed in the administration area is only a link. The plugin does not automatically transmit information to that service.
SMTP acceptance is not proof of final inbox delivery. If a worker stops after SMTP acceptance but before local confirmation, the message may be marked uncertain for manual review to avoid an automatic duplicate.
Installation
- Upload the
webdig-dev-smtpfolder to/wp-content/plugins/, or install the plugin through the WordPress Plugins screen when available in the WordPress.org Plugin Directory. - Activate WebDig.DEV SMTP through the Plugins screen.
- Open WebDig.DEV > SMTP.
- Configure the Primary SMTP transport.
- Optionally enable and configure the Backup SMTP transport.
- Save the settings and use Send Test Email to verify delivery.
- Review the Email Domain Health and Transport Health panels for configuration warnings.
FAQ
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Are my SMTP credentials sent to WebDig.DEV?
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No. WebDig.DEV SMTP does not require a WebDig.DEV remote setup service. SMTP credentials are stored in your WordPress installation and used for email delivery from that installation.
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What happens when the Primary SMTP server fails?
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If Backup SMTP is enabled and the error is eligible for failover, the plugin attempts delivery through the Backup SMTP transport. If delivery still cannot be completed and the local queue is enabled, the message can be queued for a later retry.
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Can an authentication error trigger failover?
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Yes. Authentication-failure failover can be enabled or disabled in the plugin settings.
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Does the plugin store recipient email addresses?
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When local logging is enabled, recipient addresses can be stored in the WordPress database as part of the delivery log. Logging can be disabled and log retention is configurable.
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Does the plugin guarantee that SPF, DKIM or DMARC is correctly configured?
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No. The health panels are diagnostic aids. DNS and transport configurations vary between providers. The definitive result for message authentication should be checked in the headers of a message received through the configured transport.
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Does WebDig.DEV SMTP add tracking to outgoing email?
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No tracking is added by WebDig.DEV SMTP.
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Can I use different SMTP providers for Primary and Backup?
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Yes. Primary and Backup are independent SMTP configurations, provided each transport is authorized to send mail for the addresses and domains you configure.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“WebDig.DEV SMTP” is open source software. The following people have contributed to this plugin.
Contributors
Translate “WebDig.DEV SMTP” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.5
- Fix missing DKIM transport health data when an SMTP host is empty.
- Avoid running backup health diagnostics while backup SMTP is disabled.
- Improve the standalone WebDig.DEV hub by listing installed plugins without advertising uninstalled products.
1.0.5
- Add administrator queue management with pending, processing, uncertain and abandoned views.
- Allow explicit manual retry for uncertain and abandoned messages, with duplicate-delivery warning.
- Allow administrators to mark uncertain messages resolved.
1.0.3
- Reject messages exceeding recipient limits before queueing.
- Queue mail when the quota lock is busy and queueing is enabled.
- Mark stale processing claims uncertain for manual review instead of automatically retrying.
1.0.2
- Persistent database queue with atomic message claiming and migration from legacy queue.
- Serialize quota checks and SMTP sends to prevent concurrent limit overruns.
- Restore missing queue cron events automatically.
- Improve temporary SMTP error matching and capacity label.
1.0.1
- Prevent overlapping queue processors and preserve items added during processing.
- Enforce at least one retry attempt and strip line breaks from SMTP credentials.
1.0.0
- Initial public release.
- Added Primary and Backup SMTP transports.
- Added automatic SMTP failover and configurable authentication-failure failover.
- Added local retry queue and configurable retry schedule.
- Added hourly, daily and per-message recipient limits.
- Added local delivery logging with Delivery IDs and recipient addresses.
- Added SPF, DKIM, DMARC, BIMI and transport diagnostics.
- Added HTML diagnostic test email and dedicated transport test modes.
- Added shared WebDig.DEV administration menu integration.