Support DSN extensions (RFC-3461)

[chibenwa]

As part of my commitment to the Apache James server I would be glad to experiment NIOSmtpClient for our outgoing SMTP traffic

One of the missing feature to do so would be DSN extension (RFC-3461)

Would contribution on this topic be welcomed?

If so, I can plan to have a look at its implementation on my free time.

Cheers,

[glennosss]

@jhaber @stevegutz @mcobrien Hi guys! Any updates on this request?

[mcobrien]

Hey @chibenwa, that sounds great - a contribution would definitely be welcome! 🙂