On 2019-11-05 at 22:35:11, Neal H. Walfield wrote:
I'm considering using the following "grammar". (I've put grammar in
scare quotes, because it is not a valid grammar according to RFC 5322
due to several ambiguities. In particular, the production "*WS
[name] *WS" is ambiguous when applied to a string containing a single
whitespace character: the whitespace character could match the first
WS or the second one. In practice, this ambiguity doesn't matter,
because we only care about what the "name", "comment-content" and
"addr-spec" productions match.)
WS = 0x20 (space character)
comment-specials = "<" / ">" / ; RFC 2822 specials - "(" and ")"
"[" / "]" /
":" / ";" /
"@" / "\" /
"," / "." /
DQUOTE
atext-specials = "(" / ")" / ; RFC 2822 specials - "<" and ">".
"[" / "]" /
":" / ";" /
"@" / "\" /
"," / "." /
DQUOTE
atext = ALPHA / DIGIT / ; Any character except controls,
"!" / "#" / ; SP, and specials.
"$" / "%" / ; Used for atoms
"&" / "'" /
"*" / "+" /
"-" / "/" /
"=" / "?" /
"^" / "_" /
"`" / "{" /
"|" / "}" /
"~" /
\u{80}-\u{10ffff} ; Non-ascii, non-control UTF-8
name-char-start = atext / atext-specials
name-char-rest = atext / atext-specials / WS
name = name-char-start *name-char-rest
comment-char = atext / comment-specials / WS
comment-content = *comment-char
comment = "(" *WS comment-content *WS ")"
addr-spec = dot-atom-text "@" dot-atom-text
dot-atom-text isn't defined here, so it isn't clear to me what it
includes. Does it permit UTF-8 in addresses according to the SMTPUTF8
RFCs?
--
brian m. carlson: Houston, Texas, US
OpenPGP: https://keybase.io/bk2204
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