>>I'd really like this to be fixed as its littering my mail archiving
>>system with junk addresses. I've attached the complete, unmodified
>>message as "annoyance'txt".
> The message received at your end shows up as
> "Content-Transfer-Encoding: 8bit" whereas the original message is
> "Content-Transfer-Encoding: 7bit".
> The transfer-encoding conversion may have caused the header problem.
That sounds likely. Thanks for the information.
I already have a filter installed immediately downstream of SA, so this
is easy to check by extending it: any header byte containing 0x80 or
higher is invalid because headers must be US-ASCII encoding (RFC 2821).
I can log the details of any messages containing them.
As for detoxifying the headers and stopping any further upsets, at a
guess something like:
if (c > 0x7f)
{
c = c & 0x80;
if (c < 0x20)
c = c + 'A";
}
would detoxify the invalid header bytes headers without adding
significant problems. Comments?
Martin
