[Tickets #1770] multipart/mixed messages results in "invalid mail header" on Cyrus

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Ticket URL: http://bugs.horde.org/ticket/?id=1770
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 Ticket             | 1770
 Updated By         | worf at 4uchat.de
 Summary            | multipart/mixed messages results in "invalid mail header" on Cyrus
 Queue              | IMP
 Version            | 4.0.3
 State              | Feedback
 Priority           | 3. High
 Type               | Bug
 Owners             | Michael Slusarz
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worf at 4uchat.de (2005-04-13 08:22) wrote:

I am sorry, but more in depth investigation of that problem was necessary. I
found following lines in message generated by imp4:

X-Originating-IP: 10.0.0.1
X-Remote-Browser: Mozilla/5.0 (X11; U; Linux i686; de-DE; rv:1.7.6)
        Gecko/20050322 Firefox/1.0.2
:
Sender:  <www at local>

After removing lines
X-Remote-Browser...
and
:
message was accepted by Cyrus. I made an additional test by removing line
break in X-Remote-Browser line. : (colon) also removed. Messages was also
accepted. Problem is obviously caused by 2 items:

1. A header line with a single colon and space
2. Linebreak in X-Remote-Browser.

Problem is *not* caused by line break in Content-Type