Hello!

I'm running an older version of Postfix (20010228) together with
Cyrus IMAPD (2.0.16).

I understand that 8bit characters in message headers are illegal.
Unfortunately there seem to be several broken software packages out
there that do not understand this and send messages with 8bit
characters in headers to users of my Postfix+Cyrus server.

In such cases, the offending characters get replaced with uppercase
X. I'm not sure whether it is done by Postfix or Cyrus. But my users
do not like getting Subject: lines with X-s instead of umlauts
(umlauts are quite often used in Estonian language).

There is no problem with messages where the headers are properly
MIME-encoded, but unfortunately I can't tell every possible sender to
fix their systems (one of the senders is a listserver run by a big
university).

Hence the questions:

1. Is the replacing of 8bit characters being done by Postfix or some
other piece of software?

2. If it is Postfix, is there a way to tell it to leave the 8bit
characters in headers as-is. I understand that this is not
standards-compliant but I suspect that my users don't care much about
that explanation.

Thanks in advance.

--
Toomas Aas | toomas.aasraad.tartu.ee | http://www.raad.tartu.ee/~toomas/
* Nostalgia isn't what it used to be...
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