diff --git a/lib/redmine/wiki_formatting.rb b/lib/redmine/wiki_formatting.rb
index 4ea5933..c4e4bb7 100644
--- a/lib/redmine/wiki_formatting.rb
+++ b/lib/redmine/wiki_formatting.rb
@@ -135,7 +135,7 @@ module Redmine
 
       # Destructively replaces email addresses into clickable links
       def auto_mailto!(text)
-        text.gsub!(/([\w\.!#\$%\-+.]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
+        text.gsub!(/([\w\.!#\$%\-+.\/]+@[A-Za-z0-9\-]+(\.[A-Za-z0-9\-]+)+)/) do
           mail = $1
           if text.match(/<a\b[^>]*>(.*)(#{Regexp.escape(mail)})(.*)<\/a>/)
             mail
diff --git a/test/unit/lib/redmine/wiki_formatting_test.rb b/test/unit/lib/redmine/wiki_formatting_test.rb
index 413905d..cd7f40e 100644
--- a/test/unit/lib/redmine/wiki_formatting_test.rb
+++ b/test/unit/lib/redmine/wiki_formatting_test.rb
@@ -48,6 +48,12 @@ EXPECTED
     assert_equal expected.gsub(%r{[\r\n\t]}, ''), Redmine::WikiFormatting::NullFormatter::Formatter.new(raw).to_html.gsub(%r{[\r\n\t]}, '')
   end
 
+  def test_should_link_email_with_slashes
+    raw = 'foo/bar@example.net'
+    expected = '<p><a class="email" href="mailto:foo/bar@example.net">foo/bar@example.net</a></p>'
+    assert_equal expected.gsub(%r{[\r\n\t]}, ''), Redmine::WikiFormatting::NullFormatter::Formatter.new(raw).to_html.gsub(%r{[\r\n\t]}, '')
+  end
+
   def test_links_separated_with_line_break_should_link
     raw = <<-DIFF
 link: https://www.redmine.org