Proposal: Use Full PHPMailer library
|Reported by:||Ipstenu||Owned by:|
Currently we're using a customized version of phpMailer that strips out some features. This is most evident when you compare class.smtp.php:
We're missing sections which plugin developers are using to support extended features (oauth, ntlm, etc). By leaving this out, we introduce a reason for them to include versions of PHPMailer which they then have to update in the case of security issues (such as the sort that predicated the 4.7.1 core release).
If we were to include the full library, it would be easier (and faster) for core to update in case of security issues, and it would provide more flexibility and security for plugins and (by extension) users of WordPress.