sendmail: unsupported operation mode bs

1) You can try the Native transport but it's not recommended
2) Use SMTP transport.

Can you explain why "Native transport" option is not recommended? It appears to be working for me.

See the warning at https://symfony.com/doc/current/mailer.html#using-built-in-transports

Ok, that sort of makes sense to me. So, the argument against using native transport is: you cannot control how sendmail is configured.

I poked around the issues, and I found this ( https://www.drupal.org/project/symfony_mailer/issues/3274465#comment-145... ✨ Add Sendmail transport Fixed ):

$settings['mailer_sendmail_commands'] = [
  '/usr/sbin/sendmail -i -S -t mailhog:1025',
];

This looks to me like I can override the sendmail command. Could I use this to get around the -bs flag support issue?

This looks to me like I can override the sendmail command. Could I use this to get around the -bs flag support issue?

Yes but it's still not recommended as described on the page I already linked to😃

you won't have error reporting and Bcc headers won't be removed

Thanks for your help. I think we might be ok without logging and no BCC functions.

Automatically closed - issue fixed for 2 weeks with no activity.

This line at settings.php do the trick in my hand:

$config['symfony_mailer.mailer_transport.sendmail']['configuration']['query']['command'] = ini_get('sendmail_path') . ' -t';