CMS Made Simple Forums

To prevent emails send from my website will be seen as spam, I would like to add a DKIM-header to the mails send with the cms_mailer-class. To do that I have to pass a few variables to the PHPMailer-class: DKIM_selector, DKIM_identity, DKIM_passphrase, DKIM_domain and DKIM_private.
The PHPMailer-class is ready for it, but the cms_mailer-class is not.
Is there a way to pass the variables to the PHPMailer-class other than to add them directly to the file lib/phpmailer/class.phpmailer.php?
Is it an idea to add the variables to the global mailsettings in the future?

I use CMSMS 2.1.6

Is it an idea to add the variables to the global mailsettings in the future?

I have recently just rebuilt the CMSMS server, including postfix and DKIM support. After doing considerable research wrt DKIM I have determined that:

a: adding DKIM support to CMSMS would not be an 80% feature (most users wouldn't even know what it is, and how to use it).
b: Because of the necessity of modifying the DNS entries anyway (with the key information so that signatures can be validated; the signature mechanism is best left at the MTA level rather than at the application level.