diff --git a/app/models/mail_handler.rb b/app/models/mail_handler.rb
old mode 100644
new mode 100755
index dc033de..a5b72d2
--- a/app/models/mail_handler.rb
+++ b/app/models/mail_handler.rb
@@ -578,7 +578,7 @@ class MailHandler < ActionMailer::Base
     end
 
     unless delimiters.empty?
-      regex = Regexp.new("^[> ]*(#{ Regexp.union(delimiters) })\s*[\r\n].*", Regexp::MULTILINE)
+      regex = Regexp.new("^[> ]*(#{ Regexp.union(delimiters) })[[:blank:]]*[\r\n].*", Regexp::MULTILINE)
       body = body.gsub(regex, '')
     end
     body.strip