On Thu, 10 Jan 2019 11:55:53 -0800, John Bucy said:
The MSA could call ahead/cut-through, doesn't exim do that? That might also
allow for the mua to throw an error ui at the user if they fat-fingered the
recipient rather than getting a bounce back later.
No.
Consider this reply. I'm in Comcast cable territory, which means that I can
only do outbound port 25 to Comcast/Xfinity servers. So my only realistic
way to get this mail out is to 587 it to Google's submission servers.
Now how do I "call ahead" for the cc: that's going to John Levine? There's
no way for me to contact mx1.taugh.com and ask "Hey, I'm about to hand
an email to Google, do you support BINARYMIME?"
And if I *did* make that connection, why should I not just *send the message*?
Hint: Find out what "direct to MX spam" is, and why Comcast blocks outbound
port 25.
_______________________________________________
ietf-smtp mailing list
ietf-smtp(_at_)ietf(_dot_)org
https://www.ietf.org/mailman/listinfo/ietf-smtp