How do I specify the debug_mail_directory for the devel maillog?

Question

In settings.local.php, I have set my local dev environment to use the Devel module's mail logging function:

 $config['system.mail']['interface']['default'] = 'devel_mail_log'; 
 $config['devel']['settings']['debug_mail_directory'] = "???";

The DevelMailLog documentation says that:

Filename pattern controlled by 'debug_mail_file_format' config setting.

What do I put for the filename pattern? I have tried several patterns:

• public://devel_mail
• private://emails
• sites/default/files/devel

But none of these work. I checked watchdog, but apparently devel mail doesn't leave any logs.

NOTE 1: There is a note in the docs that config settings are broken, but the linked issue is already fixed.

NOTE 2: By default, when I enable devel and export the config, the value for debug_mail_directory is temporary://devel-mails, but I don't want to store them in the temporary directory; I want to store them in the Drupal files directory if possible.

Answer 1

You should use

$config['devel.settings']['debug_mail_directory'] = 'private://mydirectory';
$config['devel.settings']['debug_mail_file_format'] = 'mypattern-%to-%subject-%datetime.mail.txt';