Fixes #35 for non-standard tag formats

Tags can be more random and not confirm to the mailbox rules.

Seperates validation of local into mailbox and tag.

lib/email_address/address.rb

@@ -246,9 +246,6 @@ def valid?(options={})
       else
         return false unless self.local.valid?
         return false unless self.host.valid?
-      end
-      if @config[:address_validation] == :smtp
-
       end
       true
     end

lib/email_address/local.rb

@@ -101,6 +101,11 @@ class Local
 
     REDACTED_REGEX = /\A \{ [0-9a-f]{40} \} \z/x # {sha1}
 
+    CONVENTIONAL_TAG_REGEX  = #  AZaz09_!'+-/=
+      %r/^([\w\!\'\+\-\/\=]+)$/i.freeze
+    RELAXED_TAG_REGEX  = #  AZaz09_!#$%&'*+-/=?^`{|}~
+      %r/^([\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+)$/i.freeze
+
     def initialize(local, config={}, host=nil)
       self.config   = config.empty? ? EmailAddress::Config.all_settings : config
       self.local    = local
@@ -328,7 +333,12 @@ def valid_encoding?(enc=@config[:local_encoding]||:ascii)
     # True if the part matches the conventional format
     def conventional?
       self.syntax = :invalid
-      self.local =~ CONVENTIONAL_MAILBOX_REGEX or return false
+      if self.tag
+        return false unless self.mailbox =~ CONVENTIONAL_MAILBOX_REGEX &&
+          self.tag =~ CONVENTIONAL_TAG_REGEX
+      else
+        return false unless self.local =~ CONVENTIONAL_MAILBOX_REGEX
+      end
       self.valid_size? or return false
       self.valid_encoding? or return false
       self.syntax = :conventional
@@ -340,7 +350,10 @@ def relaxed?
       self.syntax = :invalid
       self.valid_size? or return false
       self.valid_encoding? or return false
-      if self.local =~ RELAXED_MAILBOX_REGEX
+      if self.tag
+        return false unless self.mailbox =~ RELAXED_MAILBOX_REGEX &&
+          self.tag =~ RELAXED_TAG_REGEX
+      elsif self.local =~ RELAXED_MAILBOX_REGEX
         self.syntax = :relaxed
         true
       else
@@ -384,7 +397,7 @@ def error_message
     end
 
     def error
-      self.valid? ? nil : @error
+      self.valid? ? nil : ( @error || :local_invalid)
     end
 
   end

lib/email_address/messages.yaml

@@ -16,5 +16,6 @@ en:
     ipv6_address_invalid: "This is not a valid IPv6 address"
     local_size_long: "Mailbox name too long"
     local_size_short: "Mailbox name too short"
+    local_invalid: "Recipient is not valid"
     not_allowed: "Address is not allowed"
     server_not_available: "The remote email server is not available"

test/email_address/test_address.rb

@@ -120,4 +120,8 @@ def test_relaxed_normal
   def test_nil_address
     assert_nil EmailAddress.new(nil).normal, "Expected a nil input to make nil output"
   end
+
+  def test_nonstandard_tag
+    assert EmailAddress.valid?("[email protected]")
+  end
 end