BUG: GnuPG Key import fails to parse TLD email address
smurf at noris.de
Fri Mar 2 19:48:00 CET 2001
Michael H. Warfield:
> > The dot-at-the-end syntax is valid for DNS (host) names, but it's not
> > valid SMTP address syntax to add a dot at the end of an email address
> > (among other places).
> It's not???
Nope. Try any Zmailer-driven SMTP server (AFAIK the only software with a
_real_ RFC parser).
$ telnet mail.noris.net 25
Connected to mail.noris.net.
Escape character is '^]'.
220 mail2.noris.net noris network AG - ESMTP - no UBE/UCE !
> helo tester
250 mail2.noris.net expected "HELO play.smurf.noris.de"
> mail from:<smurf at ai.>
501-5.1.7 For input: <<smurf at ai.>
501 5.1.7 Path data: Spurious dot (.) at the end of the domain name
Dots, in RFC parlance, separate atoms, which are (more or less)
sequences of letters+numbers. You want dots anywhere else, you use
quotes. That's why the address <foo. at bar.com> is illegal and has to be
> mail from:<foo. at bar.com>
501-5.1.7 For input: <<foo. at bar.com>
501 5.1.7 Path data: Localpart must not end with unquoted dot!
To quote from RFC 821's BNF:
<mailbox> ::= <local-part> "@" <domain>
<domain> ::= <element> | <element> "." <domain>
<element> ::= <name> | "#" <number> | "[" <dotnum> "]"
<name> ::= <a> <ldh-str> <let-dig>
<ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
<let-dig> ::= <a> | <d>
<let-dig-hyp> ::= <a> | <d> | "-"
... and there you have it ... except that the syntax was relaxed a few
years later. I remember the collective "Oops" when people noticed
that mail to people at 3com.com should be delivered, thus now it's
<name> ::= <let-dig> <ldh-str> <let-dig>
(or something similar along these lines).
Matthias Urlichs | noris network AG | http://smurf.noris.de/
Make my day - try to pick up someone else
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