How to log errors thrown by wp_mail

This plugin writes errors thrown by wp_mail to your error log, however there are some steps you need to take to enable this.

First, add this snippet to your wp-config.php file:

// Enable WP_DEBUG mode
define( 'WP_DEBUG', true );
if ( WP_DEBUG ) {
        @ini_set( 'display_errors', 0 );
        define( 'WP_DEBUG_LOG', true );
        define( 'WP_DEBUG_DISPLAY', false );
}

See https://eventespresso.com/wiki/troubleshooting-checklist/#wpdebug

You add that code above the /* That's all, stop editing! Happy blogging. */ comment in the above file (example), usually you can find this code: define( 'WP_DEBUG', false ); somewhere in the file, replace that with the snippet above.

That will tell WordPress to log any errors/notices/warnings to /wp-content/debug.log so then the code in this plugin write to that file.

Once you have added the above, add the code in ee-wp-mail-log-errors.php to a custom fucntions plugin, we have some documentatio on creating one here:

https://eventespresso.com/wiki/create-site-specific-plugin-wordpress-site/