wp_mail() fails when run from wp-cli

[desmith]

In wp-includes/pluggable.php, lines 324-332, wp_mail() handles the case where no From: header is provided to an email, by attempting to create one (wordpress@domain).

The domain is determined by looking at $_SERVER['SERVER_NAME'], which fails when wp_mail is called outside of the context of a Web server (i.e. if called from a wp-cli script).

Using something like substr( home_url( '', 'http'),7) might be a suitable substitute when $_SERVER is unavailable. (If there's a better way to get a site's hostname than slicing up home_url() that of course would work too.)

[desmith]

First stab at patch for 38161

[ocean90]

Hello @desmith, welcome to our Trac!

Thanks for your report, we're already tracking this issue in #25239.

Related: ​https://github.com/wp-cli/wp-cli/issues/3374