D
by
Shubham
0 (0 reviews)
Dualsend SMTP Failover
Send WordPress email through an SMTP server or provider API, with an automatic fallback server, connection tests and a debug log.
Dualsend SMTP Failover ranks #61,181 among WordPress.org plugins with 0+ active installations, is #2,868 of 3,634 in the Communication category, and was last updated Oct 6, 2026. Data from WordPress.org, refreshed twice daily — see methodology.
Compatible with WP 7.1.4
v1.1.7
Current Version v1.1.7
Updated 1 month ago
Last Update on 06 Oct, 2026
Refreshed 1 week ago
Last Refreshed on
#2,868 of 3,634 in Communication
Rank
#61,181
—
No change
Active Installs
0+
-100%
KW Avg Position
127
2 worse
Downloads
429
+1 today
Support Resolved
0%
—
No change
Rating
0%
Review 0 out of 5
0
(0 reviews)
Next Milestone 10
0+
10+
33,613
Ranks to Climb
-
Growth Needed
8,000,000
Active Installs
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5
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- Version
- 1.1.7
- Last Updated
- Oct 06, 2026
- Requires WP
- 6.0+
- Tested Up To
- 7.1.4
- PHP Version
- 7.4 or higher
- Author
- Shubham
Support & Rating
- Rating
- ☆ ☆ ☆ ☆ ☆ 0
- Reviews
- 0
- Support Threads
- 0
- Resolved
- 0%
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Frequently Asked Questions
Common questions about Dualsend SMTP Failover
When both servers fail, the email is queued and the page carries on at once. WP-Cron tries it again every Retry Interval minutes (1 to 60, default 5), primary then fallback, up to Maximum Retries times (0 to 10, default 3), then hands it to WordPress mail. At most 100 emails wait at once; when the queue is full, or attachments exceed 10 MB, the email goes to WordPress mail at once. If your site sets DISABLE_WP_CRON, run wp-cron.php from a real server cron job.
While an email waits, it is stored in your WordPress database, body included, which can hold private content such as a password reset link. Attachments are copied to a private uploads folder under random names, with an index.php and an Apache deny rule; on nginx you can add a deny rule for the dualsend-smtp-failover-queue folder. Everything is deleted once the email is delivered or handed to WordPress mail, and when the plugin is deleted. Queued email is never sent to the plugin author. Set Maximum Retries to 0 to store nothing.
Use a provider with an API and set the connection type to API. API delivery runs over HTTPS, which is not blocked.
In the WordPress options table, readable only by users who can manage settings. They are never sent back to the browser and are masked in the debug log. Keep API keys scoped to sending only.
Usually the From address does not match a domain your provider may send for. Set up SPF, DKIM and DMARC with your provider and use a From address on that domain.
Only one plugin sends your email. While Dualsend SMTP Failover has a delivery route, it handles wp_mail() first, so the other plugin's mail settings are not used. The settings page tells you when another one is active.
No. A plugin that sets its own From address keeps it, unless you switch on Override other plugins. Until a delivery route is set up, no sender is changed.
