Connection to "process /usr/sbin/sendmail -bs" has been closed unexpectedly

Question

I have updated my Laravel version 5.4 to version 9. After that, the project is working fine, apart from sending emails.

Connection to "process /usr/bin/sendmail -bs" has been closed unexpectedly

Answer 1

Please look at https://talk.plesk.com/threads/removal-of-bs-option-from-plesk-sendmail-wrapper.365077/

As long as the plesk guys aren't able to deliver a stable interface to their sendmail binary, you can fiddle around with command line options that will stop working without any notice. Or probably you'll better use native PHP transport (https://symfony.com/doc/5.4/mailer.html#using-built-in-transports).