home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!olivea!hal.com!decwrl!sgi!nimrod.wpd.sgi.com!roberts
- From: roberts@nimrod.wpd.sgi.com (roberts)
- Newsgroups: comp.sys.sgi
- Subject: Re: 4.0.5 and mail
- Message-ID: <oqhglg8@sgi.sgi.com>
- Date: 20 Aug 92 16:17:46 GMT
- Sender: roberts@nimrod.wpd.sgi.com
- Organization: Silicon Graphics, Inc. Mountain View, CA
- Lines: 49
-
- suhonen@jalka.jyu.fi (Timo Suhonen) writes:
- >
- > Just got 4.0.5 and installed it. Release Notes says that IRIX is now
- > 8-bit system with Latin-1 as default.
-
- What release note says that? I write the release notes for mail/Mail/sendmail
- and I never wrote anything of the sort. In any event, IRIX sendmail is
- not an 8-bit system. It strips the 8th bit from all incoming and outgoing
- mail.
-
- > Why does mail clear the 8:th bit?
- > I know that RFCs allow mail to do it, but here in Finland I'd like
- > to use the Latin-1 character set in my mails.
-
- The RFCs do not *allow* sendmail to do it, they *require* it. Check the
- RFC 822 definition for CHAR from which the entire message is composed. It
- specifically forbids 8-bit characters anywhere within a message.
-
- > The international mails
- > also seems to accept 8-bit. At least mails to HP at California (?) and
- > mails to Iceland survives full 8-bit.
-
- You've been lucky. There is no way to guarantee that 8-bit data will
- always survive the trip from point A to point B. There's no way of telling
- whether or not some machine in between will strip the 8-th bit. There are
- *LOTS* of machines out there that do.
-
- Worse yet, deep in the guts of the address parsing mechanism for sendmail
- really really nasty things can happen if certain control characters (or what
- *look* like control characters after the 8th bit is stripped) turn up. I
- had to write special code for IRIX sendmail to guard against such dangerous
- characters in addresses sent by naive "8-bit clean" implementations.
-
- Note that a number of IETF working groups have been studying the problem of
- transporting 8-bit data via mail. Just this week, several new RFCs have been
- published:
-
- RFC 1341: MIME (Multipurpose Internet Mail Extensions):
- Mechanisms for Specifying and Describing
- the Format of Internet Message Bodies
- RFC 1342: Representation of Non-ASCII Text in Internet
- Message Headers
- RFC 1343: A User Agent Configuration Mechanism
- For Multimedia Mail Format Information
- RFC 1344: Implications of MIME for Internet Mail Gateways
-
-
- - Robert Stephens
- Silicon Graphics Inc.
-