wp_mail(): $from_email generation produce error with nginx default vhost '_'

[benprowp]

Hello,

I have an nginx default vhost with the server_name setted at _.

server_name _;

This cause the generation of from_email to: wordpress@_.
And I saw no errors catched/displayed by WordPress. I needed to debug manually
wp-includes/pluggable.php.

You should display why the mail cannot be send, at least in debug mode!
And maybe you should not use $sitename = strtolower( $_SERVER['SERVER_NAME'] );, but the address of the WordPress siteurl.

[SergeyBiryukov]

Hi @benprowp, welcome to WordPress Trac!

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