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bug#19431: 24.4; Bad handling of RFC2047 encoded headers by 'mail-extrac


From: Enrico Scholz
Subject: bug#19431: 24.4; Bad handling of RFC2047 encoded headers by 'mail-extract-address-components'
Date: Mon, 22 Dec 2014 16:10:56 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux)

Hi,

the emacs email framework fails on email addresses containing umlauts.
E.g. in the following example

--- {{{ snip ---
; set a (nearly) real-world To: address; the umlaut '=C3=A4' encoding
; was replaced by '=61=65'
(let* ((address "=?utf-8?Q?B=61=65Br=2C_Klaus?= <address@hidden>")
       (decoded (rfc2047-decode-string address)))
  ; show output with encoded umlauts and non-RFC2047 header
  (print (mail-extract-address-components "\"Baer, Klaus\" <address@hidden>"))
  (print address t)
  (print decoded t)
  ; previous prints were just for debugging purposes; now, the real
  ; functions will be called...
  (print (mail-extract-address-components address))
  (print (mail-extract-address-components decoded)))
--- }}} snip ---

none of the last two debug outputs show the expected split.

| ("Klaus Baer" "address@hidden")            <--- this is expected
| 
| "=?utf-8?Q?B=61=65r=2C_Klaus?= <address@hidden>"
| 
| "Baer, Klaus <address@hidden>"
| 
| ("utf" "address@hidden")   <-- BAD (working on undecoded string)
| 
| (nil "Baer")                 <-- BAD (working on decoded string)
| (nil "Baer")


Unfortunately, such RFC2047 encoded addresses are very common in Germany
so that e.g. BBDB (which works on the 'decoded' string) fails in very
much cases.



Enrico





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