From what I was told from Server Owner, the below should be Correct. The Sending Error currently says SMTP Authorization should be Turned On. How can I Turn It On?
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// SMTP server host (for sending mails).
// To use SSL/TLS connection, enter hostname with prefix ssl:// or tls://
// If left blank, the PHP mail() function is used
// Supported replacement variables:
// %h - user's IMAP hostname
// %n - http hostname ($_SERVER['website.com'])
// %d - domain (http hostname without the first part)
// %z - IMAP domain (mail.website.com)
// For example %n = mail.domain.tld, %d = domain.tld
$rcmail_config['smtp_server'] = 'mail.website.com';