Feature request: Options to select specific certicate/key-pairs (TLS authentication)

[odkr]

Describe your desired feature

Would you consider adding an option to use a specific TLS certificate/key pair?

We use a dedicated mail exchanger for mail that is sent by applications rathar than people. That server uses TLS authentication, because it's easier to generate a certificate for each of our machines than to manage per-machine/per-application mail accounts and TLS authentication can be used with other services (syslog, monitoring, etc.), too.

It would be simple to implement. The option would take the name of a PEM file and pass on that filename to PHPMailer\SMTP::connect using the "local_cert" SSL option.

Thanks for considering!