From: Timo Sirainen tss@iki.fi Subject: Re: [Dovecot] emails getting mangled when dragging from Exchange account to IMAP shared folders
On Wed, 2010-11-03 at 16:18 -0700, Scott Goodwin wrote:
FYI, I got rawlog working and it shows the same break in the raw logs as in the broken headers. Below is a snippet from the rawlog (names and other identifiers redacted). The offending sequence is always in the References headers section, and you can see the line breaks there that show this. So it sounds like this can't be an issue with Dovecot, am I right?
Yeah, sounds like Outlook breaks with huge headers. That's one huge References header you have.
Summarising mail standards (WRT headers)
There is a limit of 4096 characters per line.
If Outlook is breaking at less than that it's a bug.
If the References: line is longer than that then it should have been truncated by the sending MUA - there's no provision for multiline References headers (which are a non-standardised import from Usenet anyway).