nanog mailing list archives
Re: IPv6 isn't SMTP
From: Dave Crocker <dhc2 () dcrocker net>
Date: Thu, 27 Mar 2014 18:46:58 -0700
On 3/27/2014 6:51 AM, Blake Hudson wrote:
The primary issues I see with SMTP as a protocol related to the lack of authentication and authorization. Take, for instance, the fact that the SMTP protocol requires a mail from: and rcpt to: address (more or less for authentication and authorization purposes),
Actually, for neither.Mail from was mislabeled; it merely provides an address to send return notices to, which is why it makes sense to permit it to be different from the rfc5322.From value. And, of course, rcpt to specifies a recipient address.
auth/auth functions were tacked on much, much later, which is why their utility is so constrained. (20 years?)
but then in the message allows the sender to specify a completely different set of sender and recipient information that gets displayed in the mail client.
Yeah. Almost like it is approximating the difference between what is on the outside of a postal envelope versus what is on the letterhead and opening of a piece of paper mail, which also permit such independence...
The essential problem with seeing these as 'problems' is confusing 'common' with 'required'. Common scenarios are fine, but so are the variants. The variants often blow apart the simplifying assumption that one can incorrectly believe from the common scenarios.
d/ -- Dave Crocker Brandenburg InternetWorking bbiw.net
Current thread:
- Re: IPv6 isn't SMTP, (continued)
- Re: IPv6 isn't SMTP Daniel Taylor (Mar 26)
- Re: IPv6 isn't SMTP Blake Hudson (Mar 26)
- Re: IPv6 isn't SMTP Jimmy Hess (Mar 26)
- Re: IPv6 isn't SMTP Blake Hudson (Mar 27)
- Re: IPv6 isn't SMTP Barry Shein (Mar 27)
- Re: IPv6 isn't SMTP Blake Hudson (Mar 27)
- Re: IPv6 isn't SMTP Barry Shein (Mar 27)
- Re: IPv6 isn't SMTP Blake Hudson (Mar 28)
- Re: IPv6 isn't SMTP Clay Fiske (Mar 27)
- Re: IPv6 isn't SMTP Blake Hudson (Mar 28)
- Re: IPv6 isn't SMTP Dave Crocker (Mar 27)
- Re: IPv6 isn't SMTP Lamar Owen (Mar 27)
- Re: IPv6 isn't SMTP James R Cutler (Mar 26)
- Re: IPv6 isn't SMTP John Levine (Mar 26)
- Re: IPv6 isn't SMTP Tony Finch (Mar 27)
- Re: IPv6 isn't SMTP Enno Rey (Mar 27)
- Re: IPv6 isn't SMTP John R. Levine (Mar 27)
- Re: IPv6 isn't SMTP Robert Drake (Mar 26)
- Re: IPv6 address literals probably aren't SMTP either John Levine (Mar 26)