I am trying to configure oscommerce v4 to use my external mail server to send mails. It has strict security, and requires the following: • TLS on port 587 • Sender name (email from) must match email username (full email address that exists on the mail server) I see there is an option to use swiftmailer, however that has been replaced with symfony mailer - either way, I can't find much documentation on setting that up for OSCommerce (and I am not proficient enough to dig deep into the co