Non-ASCII characters and line-breaks in e-mail headers (Zend_Mail), RFC 2047

[dlukas]

Hi,

I've been having problems with long lines containing non-ASCII characters in
e-mail headers. It seems Zend_Mail::_encodeHeader() and
Zend_Mail::_storeHeader() do not conform to the RFC 2047 (Message Header
Extensions for Non-ASCII Text):

encoded-word: =?charset?encoding?encoded-text?=
An 'encoded-word' may not be more than 75 characters long, including
'charset', 'encoding', 'encoded-text', and delimiters. If it is
desirable to encode more text than will fit in an 'encoded-word' of
75 characters, multiple 'encoded-word's (separated by CRLF SPACE) may
be used.

The forementioned functions do not split long text into multiple
ecodede-words but simply insert equal signs as linebreaks, which does not
work (at least not in my mail system - Exchange, Outlook).

David