Re: [exim] Header syntax check and 8-bit characters

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Συντάκτης: Tony Finch
Ημερομηνία:  
Προς: Michael Haardt
Υ/ο: exim-users
Αντικείμενο: Re: [exim] Header syntax check and 8-bit characters
On Tue, 15 Feb 2005, Michael Haardt wrote:
>
> Are 8-bit characters in mail headers acceptable at all? I did not find
> a place where RFC 2822 allows them (which does not mean much). I know
> Exim allows them, because it is 8-bit clean and proud of it.


They aren't permitted by the standard, mainly because Sendmail uses the
top bit of characters internally to mark the variables used by its
rewriting engine, so a standard that allowed just-send-8 would have
caused too much breakage.

> Are there legitimate MUAs generating such (today) broken mails?


Probably.

Tony.
--
<fanf@???> <dot@???> http://dotat.at/ ${sg{\N${sg{\
N\}{([^N]*)(.)(.)(.*)}{\$1\$3\$2\$1\$3\n\$2\$3\$4\$3\n\$3\$2\$4}}\
\N}{([^N]*)(.)(.)(.*)}{\$1\$3\$2\$1\$3\n\$2\$3\$4\$3\n\$3\$2\$4}}