Philip Ayres wrote:
Am I right in thinking you can't send attachments via
IFIS chat (or any of
out other lists ?)
They come out looking very very very WRONG.
Very long story, but in a nutshell... Email was never designed for
binary stuff, only text. Something called MIME was invented to encode
binary stuff as text for sending over email. This is what's used for
your attachments. It's also what's used when you send pound-signs,
because pound-signs don't count as "text"[1].
IFIS had some lists. RHUL
changed their email system to use the notoriously unreliable MESS [2].
RHUL accepted mail from
IFIS for many tens of
IFIS users, but then
dropped it on the floor. "yes, thanks for the mail", their server would
say, then dispose of it without delivering to any of you, and without
returning error messages or anything. Information Superhypewayman
contacts RHUL CC to ask 'em what's going on. They seem relatively sure
it's their anti-spamming stuff, but basically after several weeks of
email exchange, hair-pulling, and having no useable
IFIS lists[4], RHUL
hadn't fixed it, and I decided I'd have to sort it out myself. Even
though the problem was at THEIR end, I'd find some way around it.
Sending only 5 emails at a time didn't help, but removing all MIME
headers, for no explainable reason[5], seemed to make the lists spring
back into life. Therefore, we've had MIME headers removed ever since,
and if you DO send attachments or pound-signs, they'll kind of go
through, in MIME format, but won't be recognised by your mailer as such,
because the MIME headers have been removed, so you'll see all the yucky
=A3 stuff that MIME does for pound-signs, and the yucky "base64 encoded"
stuff it does for attachments.
[1] at least not in the american standard[2] email uses
[2] ASCII
[3] MESS : Microsoft Exchange Server software
[4] Amusingly enough, they worked perfectly for anyone NOT using an
rhbnc.ac.uk email address.
[5] Unless you count "microsoft bug" [6]
[6] Sorry, "feature"
Yes, basically RHUL seems to be incapable of accepting back it's OWN
messages, in the same format that THEY sent out, if it's sent back to
more than about a dozen of their own users.
IFIS has to basically
deliberately modify it to the simplest possible format. Makes no sense,
but it gets the lists working.
I might experiment with allowing MIME headers again sometime, but
unfortunately I can't just do a test with a handfull of people, because
then, in some mysterious way that only quantum physics could explain, it
works. Unfortunately I'd have to test by sending multiple test messages
to probably ALL of you, and annoy everyone :-(
Nick Waterman. Senior Systems Administrator, Sony Interactive Services
mailto:nick-sig@ http://www.nilex.co.uk/~nick/
AX25:G7RZQ@#32.GBR.EU #include <stddisclaimer> Team *AMIGA*!
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