[Minor] Recognize Icedove MUA as Thunderbird (#1359)

diff --git a/rules/regexp/headers.lua b/rules/regexp/headers.lua
index 414a13aefcf387bab85e75187772d52a707aa5d9..2aa7b139c0cbc98a3f0dcf15024a35ae579c9f60 100644 (file)
--- a/rules/regexp/headers.lua
+++ b/rules/regexp/headers.lua
@@ -440,7 +440,7 @@ reconf['FORGED_MUA_OPERA_MSGID'] = {
 -- Detect forged Mozilla Mail/Thunderbird/Seamonkey headers
 -- Mozilla based X-Mailer
 local user_agent_mozilla5      = 'User-Agent=/^\\s*Mozilla\\/5\\.0/H'
-local user_agent_thunderbird   = 'User-Agent=/^\\s*(Thunderbird|Mozilla Thunderbird|Mozilla\\/.*Gecko\\/.*Thunderbird\\/)/H'
+local user_agent_thunderbird   = 'User-Agent=/^\\s*(Thunderbird|Mozilla Thunderbird|Mozilla\\/.*Gecko\\/.*(Thunderbird|Icedove)\\/)/H'
 local user_agent_seamonkey     = 'User-Agent=/^\\s*Mozilla\\/5\\.0\\s.+\\sSeaMonkey\\/\\d+\\.\\d+/H'
 local user_agent_mozilla       = string.format('(%s) & !(%s) & !(%s)', user_agent_mozilla5, user_agent_thunderbird, user_agent_seamonkey)
 -- Mozilla based common Message-ID template