Index: lib/redmine/wiki_formatting.rb
===================================================================
--- lib/redmine/wiki_formatting.rb	(revision 14222)
+++ lib/redmine/wiki_formatting.rb	(working copy)
@@ -135,7 +135,7 @@
 
       # 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
Index: test/unit/lib/redmine/wiki_formatting_test.rb
===================================================================
--- test/unit/lib/redmine/wiki_formatting_test.rb	(revision 14222)
+++ test/unit/lib/redmine/wiki_formatting_test.rb	(working copy)
@@ -37,12 +37,12 @@
   def test_should_link_urls_and_email_addresses
     raw = <<-DIFF
 This is a sample *text* with a link: http://www.redmine.org
-and an email address foo@example.net
+and email addresses foo@example.net and foo/bar@example.net
 DIFF
 
     expected = <<-EXPECTED
 <p>This is a sample *text* with a link: <a class="external" href="http://www.redmine.org">http://www.redmine.org</a><br />
-and an email address <a class="email" href="mailto:foo@example.net">foo@example.net</a></p>
+and email addresses <a class="email" href="mailto:foo@example.net">foo@example.net</a> and <a class="email" href="mailto:foo/bar@example.net">foo/bar@example.net</a></p>
 EXPECTED
 
     assert_equal expected.gsub(%r{[\r\n\t]}, ''), Redmine::WikiFormatting::NullFormatter::Formatter.new(raw).to_html.gsub(%r{[\r\n\t]}, '')