On 10 Jun 2016, at 3:40, Merijn van den Kroonenberg wrote:

On 9 Jun 2016, at 0:53, Henrik K wrote:

Garbage text/plain is known problem..

text/html too. From GMail.

Last week I had a *perfectly legitimate* message with a 151KB logical
single line of HTML (QP encoded of course) freeze up a server scaled for
10k users.
[snip]

Are there publically available some mails which might cause these kind of
problems? It would be interesting for testing set-ups.

Not that I'm aware of. This particular case involved a customer organization who I wouldn't ever consider asking to share their mail for any reason, as they specialize in a field where the privacy issues would be insurmountable.

One could mock up such messages by hand rather easily: find & copy or create (maybe Word would be a choice tool for this...) a bloated HTML page, replace all the line breaks with spaces in a proper text editor. Attach that to an email message or just make it the sole body part of a pure text/html message.

It MAY be that this was a case where someone wrote something big-ish and highly-formatted inside GMail or Google Docs and mailed it so the structure is GMail's fault. It could also be that some MUA or document generation tool constructed the mail and it came through GMail via SMTP submission. I do not know which it is but I would bet on the latter, given Google's core expertise in working with HTML. My reflexes in these sorts of cases where I have to handle customer non-spam mail are to not look too closely at anything non-critical to solving the problem at hand and swiftly forget anything unimportant I happen to see (which gets easier every year...)

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