KevinTheJedi So I was able to do all of this, however I'm getting a long error saying "The input is not a valid email address." Even though I copied over the ost-config.php file like you said.
Here is the full error:
[php:error] [pid 910] [client 192.168.3.102:55775] PHP Fatal error: Uncaught Laminas\Mail\Exception\InvalidArgumentException: The input is not a valid email address. Use the basic format local-part@hostname in /var/www/osTicket/include/laminas-mail/src/Address.php:78\nStack trace:\n#0 /var/www/osTicket/include/laminas-mail/src/AddressList.php(234): Laminas\Mail\Address->__construct()\n#1 /var/www/osTicket/include/laminas-mail/src/AddressList.php(34): Laminas\Mail\AddressList->createAddress()\n#2 /var/www/osTicket/include/laminas-mail/src/Message.php(537): Laminas\Mail\AddressList->add()\n#3 /var/www/osTicket/include/laminas-mail/src/Message.php(131): Laminas\Mail\Message->updateAddressList()\n#4 /var/www/osTicket/include/laminas-mail/src/Message.php(118): Laminas\Mail\Message->addFrom()\n#5 /var/www/osTicket/include/class.mail.php(230): Laminas\Mail\Message->setFrom()\n#6 /var/www/osTicket/include/class.mailer.php(347): osTicket\Mail\Message->setFrom()\n#7 /var/www/osTicket/include/class.mailer.php(679): osTicket\Mail\Mailer->send()\n#8 /var/www/osTicket/bootstrap.php(327): osTicket\Mail\Mailer::sendmail()\n#9 /var/www/osTicket/bootstrap.php(212): Bootstrap::croak()\n#10 /var/www/osTicket/main.inc.php(28): Bootstrap::connect()\n#11 /var/www/osTicket/client.inc.php(21): require_once('...')\n#12 /var/www/osTicket/index.php(16): require('...')\n#13 {main}\n thrown in /var/www/osTicket/include/laminas-mail/src/Address.php on line 78