Follow-up Comment #13, sr #105528 (project administration):
I took a look at the log_accum and svnmailer, and I agree that it is not
trivial at all to implement auto-guessing of the encoding; also this approach
is almost certainly doomed to fail (for example, the log message in
ISO-8859-15, one file in UTF-8 and another one in CP1251).
AFAIU svnmailer tries some fairly complex ways to determine the encoding,
including checking svn:mime-type, the files themselves, the log message etc.
It has a fallback mechanism and it's not 100% sure that the mail header will
be correct. It just happens to work in most cases.
I suggest to do the following: If there is an easy way to check the body
(perhaps in `build_message_body'), try if it is only US-ASCII, then UTF-8 and
finally (if it is not valid), ISO-8859-1. Alternatively, just add this header
(in the `send_mail' subroutine?) with UTF-8 hardcoded. That's easy and won't
hurt much, I guess.
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