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[ietf-smtp] Dotless domains and email

2013-06-21 10:12:00
Folks,

G'day.

From ICANN SSAC SAC 053
(www.icann.org/en/groups/ssac/documents/sac-053-en.pdf):

"3.4       Electronic Mail One serious and prevalent concern is that
dotless domains would not work with protocols that specify additional
rules of what constitutes a legal domain. The most prominent example
is the Simple Mail Transfer Protocol (SMTP) to deliver electronic
mail. It requires at least two labels in the FQDN of a mail address.
Thus standard-compliant mail servers would reject emails to addresses
such as user@brand."



I'm not seeing this requirement/limitation in RFC 5321. It merely requires an FQDN.

Does anyone have an explanation for the assessment in the ICANN report that at least two levels are required?

d/

--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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