Title: Flexa MailBridge
Author: FlexaTech
Published: September 17, 2026
Last modified: September 17, 2026
---
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# Flexa MailBridge
By [FlexaTech](https://profiles.wordpress.org/flexatech/)
[Download](https://downloads.wordpress.org/plugin/flexa-mailbridge.1.0.0.zip)
* [Details](https://wordpress.org/plugins/flexa-mailbridge/#description)
* [Reviews](https://wordpress.org/plugins/flexa-mailbridge/#reviews)
* [Installation](https://wordpress.org/plugins/flexa-mailbridge/#installation)
* [Development](https://wordpress.org/plugins/flexa-mailbridge/#developers)
[Support](https://wordpress.org/support/plugin/flexa-mailbridge/)
## Description
Flexa MailBridge is the email delivery layer for your WordPress site. It sits between`
wp_mail()` and your mail provider, so every message your site sends (order emails,
password resets, form notifications, newsletters) goes out through a real mailer
instead of the default `mail()` that so often lands in spam.
Around that core it adds the parts a dependable delivery pipeline needs: a fallback
mailer for when the primary one fails, an optional background queue that retries
temporary failures, a full log of everything sent, open and click tracking, and
delivery reports.
#### Routing and fallback
Set the From name and address (with optional force overrides), pick a primary mailer,
and choose a fallback that takes over automatically if the primary fails. Eighteen
transports are supported:
* Custom SMTP (any host)
* SendGrid, Mailgun, Brevo (Sendinblue), Postmark, Mailjet, SparkPost, SMTP.com,
SendPulse, Pepipost, Mandrill, Amazon SES, Yournotify
* IONOS
* Gmail / Google Workspace, Outlook / Microsoft 365, and Zoho Mail (OAuth: connect
with a click, no password stored)
* WordPress default (`mail()`)
API credentials and OAuth tokens are encrypted at rest (AES-256-GCM) and are never
returned to the browser in plain text.
#### Delivery queue and retries
Turn on the optional queue to send email in the background instead of during the
page request, so a slow provider never holds up checkout or a form submission. Temporary
failures (rate limits, timeouts, transient provider errors) are retried with backoff
up to a limit you set; permanent errors are left alone rather than retried forever.
The queue is off by default, so nothing changes until you enable it.
#### Email logs
Every message is logged with its status (sent / failed / pending), mailer, recipients,
subject, source, and the exact error when a send fails. Browse, search, and filter
the log, open any entry to see its full body and engagement, and export the current
view to CSV. Set a retention window to prune old logs automatically.
#### Open and click tracking
Optionally embed a tracking pixel and rewrite links so you can see which emails
were opened and which links were clicked, per message.
#### Reports
A dashboard widget and a Reports tab summarise delivery trends (sent vs. failed,
open and click rates, busiest mailers, top links) over 7/30/90 days, with optional
weekly and monthly digest emails.
#### WP-CLI
* `wp flexa-mailbridge log list`: list and filter the email log (status, mailer,
search, date range; table/csv/json output)
* `wp flexa-mailbridge log get `: show one entry in full
* `wp flexa-mailbridge test `: send a test email through the active mailer
* `wp flexa-mailbridge reset`: wipe all Flexa MailBridge data
#### Import
Migrate settings and logs from WP Mail SMTP, Easy WP SMTP, SMTP Mailer, WP SMTP,
or WP Mail Bank. Secrets are re-encrypted on import.
### External services
Flexa MailBridge does not contact any external service on its own. It connects to
a mail provider **only when you select and configure that provider as your mailer**(
or connect it via OAuth). Each provider below is contacted solely to deliver the
WordPress email you send. In every case the request happens when an email is sent,
and the data transmitted is the outgoing message (recipients, subject, body, headers,
and any attachments) together with the credentials you entered for that provider(
sent as an authorization header). No data is sent to the plugin author, and no analytics
or telemetry is collected.
For the OAuth mailers (Gmail, Outlook, Zoho) there is an additional one-time authorization
step: when you click “Connect”, your browser is redirected to the provider’s sign-
in page, and the plugin then exchanges the returned authorization code for an access
token over HTTPS. Tokens are stored encrypted and refreshed with the provider as
needed.
The Custom SMTP and IONOS mailers connect over SMTP to the host you configure (for
IONOS, one of `smtp.ionos.com` / `.de` / `.es` / `.fr` / `.co.uk`); no third-party
HTTP API is involved.
API mailers (contacted at send time):
* **SendGrid**: `https://api.sendgrid.com`. Terms: https://www.twilio.com/en-us/
legal/tos | Privacy: https://www.twilio.com/en-us/legal/privacy
* **Mailgun**: `https://api.mailgun.net` or `https://api.eu.mailgun.net`. Terms:
https://www.mailgun.com/legal/terms/ | Privacy: https://www.mailgun.com/legal/
privacy-policy/
* **Brevo**: `https://api.brevo.com`. Terms: https://www.brevo.com/legal/termsofuse/
| Privacy: https://www.brevo.com/legal/privacypolicy/
* **Postmark**: `https://api.postmarkapp.com`. Terms: https://postmarkapp.com/terms-
of-service | Privacy: https://postmarkapp.com/privacy-policy
* **Mailjet**: `https://api.mailjet.com`. Terms: https://www.mailjet.com/legal/
terms/ | Privacy: https://www.mailjet.com/legal/privacy-policy/
* **SparkPost** (now part of Bird): `https://api.sparkpost.com` or `https://api.
eu.sparkpost.com`. Terms: https://bird.com/en-us/legal/terms | Privacy: https://
bird.com/en-us/legal/privacy
* **SMTP.com**: `https://api.smtp.com`. Terms: https://www.smtp.com/policies/terms-
of-use/ | Privacy: https://www.smtp.com/policies/privacy-policy/
* **SendPulse**: `https://api.sendpulse.com` (an OAuth token is fetched from the
same host before sending). Terms: https://sendpulse.com/legal/terms | Privacy:
https://sendpulse.com/legal/pp
* **Pepipost / Netcore**: `https://api.pepipost.com`. Terms: https://netcorecloud.
com/terms-of-service/ | Privacy: https://netcorecloud.com/privacy-policy/
* **Mandrill**: `https://mandrillapp.com`. Terms: https://mailchimp.com/legal/terms/
| Privacy: https://mailchimp.com/legal/privacy/
* **Yournotify**: `https://api.yournotify.com`. Terms: https://yournotify.com/terms
| Privacy: https://yournotify.com/privacy-policy/
* **Amazon SES**: `https://email.{region}.amazonaws.com`. Terms: https://aws.amazon.
com/service-terms/ | Privacy: https://aws.amazon.com/privacy/
OAuth mailers (authorization + send):
* **Gmail / Google Workspace**: `https://accounts.google.com`, `https://oauth2.
googleapis.com`, `https://gmail.googleapis.com`. Terms: https://policies.google.
com/terms | Privacy: https://policies.google.com/privacy
* **Outlook / Microsoft 365**: `https://login.microsoftonline.com`, `https://graph.
microsoft.com`. Terms: https://www.microsoft.com/servicesagreement | Privacy:
https://privacy.microsoft.com/privacystatement
* **Zoho Mail**: `https://accounts.zoho.{region}` and `https://mail.zoho.{region}`(
region one of com/eu/in/com.au/jp). Terms: https://www.zoho.com/terms.html |
Privacy: https://www.zoho.com/privacy.html
### Source code for compiled JavaScript and CSS
The admin app ships as a compiled bundle in `assets/dist/`. The human-readable
TypeScript and CSS source, together with its build config, lives in the public repository
at https://github.com/flexatech/flexa-mailbridge/ (under `apps/admin/`) and is built
with pnpm + Vite from the plugin root:
1. `pnpm install`
2. `pnpm run build` (or `pnpm run dev` for a watched dev build)
This runs a type check and writes the bundle to `assets/dist/`.
## Installation
1. Upload the `flexa-mailbridge` folder to `/wp-content/plugins/`.
2. Activate the plugin through the **Plugins** menu in WordPress.
3. Go to **Flexa MailBridge** in the admin menu, choose your mailer, enter its credentials(
or connect via OAuth), and send a test email.
## FAQ
### Will sending email slow down my site?
Not if you enable the delivery queue. With the queue on, `wp_mail()` hands the message
off and returns right away, and the actual send happens in the background on WP-
Cron, with automatic retries for temporary failures.
### Are my API keys and passwords safe?
Yes. Every secret credential and OAuth token is encrypted with AES-256-GCM before
it is stored, and secrets are masked (never sent in plain text) when the settings
screen loads.
### Does tracking require logging?
Yes. Open/click tracking is recorded against the email log, so email logging must
be enabled for tracking to work.
### Can I use it with WP-CLI?
Yes. See the WP-CLI commands listed in the description.
## Reviews
There are no reviews for this plugin.
## Contributors & Developers
“Flexa MailBridge” is open source software. The following people have contributed
to this plugin.
Contributors
* [ FlexaTech ](https://profiles.wordpress.org/flexatech/)
[Translate “Flexa MailBridge” into your language.](https://translate.wordpress.org/projects/wp-plugins/flexa-mailbridge)
### Interested in development?
[Browse the code](https://plugins.trac.wordpress.org/browser/flexa-mailbridge/),
check out the [SVN repository](https://plugins.svn.wordpress.org/flexa-mailbridge/),
or subscribe to the [development log](https://plugins.trac.wordpress.org/log/flexa-mailbridge/)
by [RSS](https://plugins.trac.wordpress.org/log/flexa-mailbridge/?limit=100&mode=stop_on_copy&format=rss).
## Changelog
#### 1.0.0
* First stable release.
* 18 mailers: custom SMTP, 13 API providers, 3 OAuth providers (Gmail/Outlook/Zoho),
IONOS, and WordPress default, with a configurable fallback mailer.
* Optional background delivery queue with automatic retry of temporary failures.
* Email logging with search/filter, per-message detail, CSV export, and automatic
retention.
* Open and click tracking.
* Delivery reports (dashboard widget, Reports tab, weekly/monthly digests).
* Import of settings and logs from five other SMTP plugins.
* WP-CLI: `log list`, `log get`, `test`, `reset`.
* All secrets encrypted at rest (AES-256-GCM); OAuth and tracking endpoints use
HMAC-signed tokens.
## Meta
* Version **1.0.0**
* Last updated **21 hours ago**
* Active installations **Fewer than 10**
* WordPress version ** 6.2 or higher **
* Tested up to **7.1.1**
* PHP version ** 8.2 or higher **
* Tags
* [email delivery](https://wordpress.org/plugins/tags/email-delivery/)[email log](https://wordpress.org/plugins/tags/email-log/)
[Email Tracking](https://wordpress.org/plugins/tags/email-tracking/)[smtp](https://wordpress.org/plugins/tags/smtp/)
[WP Mail SMTP](https://wordpress.org/plugins/tags/wp-mail-smtp/)
* [Advanced View](https://wordpress.org/plugins/flexa-mailbridge/advanced/)
## Ratings
No reviews have been submitted yet.
[Your review](https://wordpress.org/support/plugin/flexa-mailbridge/reviews/#new-post)
[See all reviews](https://wordpress.org/support/plugin/flexa-mailbridge/reviews/)
## Contributors
* [ FlexaTech ](https://profiles.wordpress.org/flexatech/)
## Support
Got something to say? Need help?
[View support forum](https://wordpress.org/support/plugin/flexa-mailbridge/)