This plugin was created specifically as an extension for Contact Form and Contact Form 7 plugin.
It can receive messages ONLY from Contact Form and Contact Form 7 plugins.
In case you used Contact Form plugin with Contact Form to DB plugin earlier and decide to delete or deactivate it, Contact Form to DB plugin will work as an archive for your old messages.
This article related to Contact Form to DB plugin
Additional resources: Contact Form to DB - User Guide
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