From 494005eaa5e19961a455276861fb8e0d520b4656 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adri=C3=A0=20Casaj=C3=BAs?=
 <acasajus@users.noreply.github.com>
Date: Tue, 5 Jul 2022 12:19:14 +0200
Subject: [PATCH] Fix: Add weird encodings to the list (#1146)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

(cherry picked from commit cfed4061e7bf3e34c52518b905065055acb8858e)

Co-authored-by: Adrià Casajús <adria.casajus@proton.ch>
---
 app/email_utils.py | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/app/email_utils.py b/app/email_utils.py
index c5c21785..f2d5a02a 100644
--- a/app/email_utils.py
+++ b/app/email_utils.py
@@ -874,8 +874,24 @@ def get_encoding(msg: Message) -> EmailEncoding:
     - base64
     - 7bit: default if unknown or empty
     """
-    cte = str(msg.get(headers.CONTENT_TRANSFER_ENCODING, "")).lower().strip()
-    if cte in ("", "7bit", "7-bit", "8bit", "binary", "8bit;", "utf-8"):
+    cte = (
+        str(msg.get(headers.CONTENT_TRANSFER_ENCODING, ""))
+        .lower()
+        .strip()
+        .strip('"')
+        .strip("'")
+    )
+    if cte in (
+        "",
+        "7bit",
+        "7-bit",
+        "7bits",
+        "8bit",
+        "8bits",
+        "binary",
+        "8bit;",
+        "utf-8",
+    ):
         return EmailEncoding.NO
 
     if cte == "base64":