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Re: [ietf-smtp] Dotless domains and email

2013-06-21 14:24:50
On 6/21/2013 12:14 PM, Barry Leiba wrote:
They might have been looking at RFC 2821

Well, that would be odd, certainly.

On the other hand, I'm not finding text in RFC 2821 (searching only for
FQDN) that asserts the limitation.  Pointer please?

Assembled from the bits of grammar in 2821:

    "RCPT TO:" ("<Postmaster@" domain ">" / "<Postmaster>" /
           Forward-Path) [SP Rcpt-parameters] CRLF

    Forward-path = Path

    Path = "<" [ A-d-l ":" ] Mailbox ">"

    Mailbox = Local-part "@" Domain

    Domain = (sub-domain 1*("." sub-domain)) / address-literal

---
RFC 5321 makes "Domain" this:

    Domain         = sub-domain *("." sub-domain)

...which allows the dotless option.


wow.  never occurred to me.

thanks!

d/


--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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