avoid generating invalid SMTP commands in ruby pre 1.9

Signed-off-by: Michael Koziarski <michael@koziarski.com>

actionmailer/lib/action_mailer/base.rb

@@ -675,7 +675,7 @@ def create_mail
       def perform_delivery_smtp(mail)
         destinations = mail.destinations
         mail.ready_to_send
-        sender = (mail['return-path'] && mail['return-path'].spec) || mail['from']
+        sender = (mail['return-path'] && mail['return-path'].spec) || Array(mail.from).first
 
         smtp = Net::SMTP.new(smtp_settings[:address], smtp_settings[:port])
         smtp.enable_starttls_auto if smtp_settings[:enable_starttls_auto] && smtp.respond_to?(:enable_starttls_auto)

actionmailer/test/mail_service_test.rb

@@ -29,6 +29,18 @@ def cancelled_account(recipient)
     self.body       = "Goodbye, Mr. #{recipient}"
   end
 
+  def from_with_name
+    from       "System <system@loudthinking.com>"
+    recipients "root@loudthinking.com"
+    body       "Nothing to see here."
+  end
+
+  def from_without_name
+    from       "system@loudthinking.com"
+    recipients "root@loudthinking.com"
+    body       "Nothing to see here."
+  end
+
   def cc_bcc(recipient)
     recipients recipient
     subject    "testing bcc/cc"
@@ -454,6 +466,28 @@ def test_cc_bcc
     assert_equal expected.encoded, ActionMailer::Base.deliveries.first.encoded
   end
 
+  def test_from_without_name_for_smtp
+    ActionMailer::Base.delivery_method = :smtp
+    TestMailer.deliver_from_without_name
+
+    mail = MockSMTP.deliveries.first
+    assert_not_nil mail
+    mail, from, to = mail
+
+    assert_equal 'system@loudthinking.com', from.to_s
+  end
+
+  def test_from_with_name_for_smtp
+    ActionMailer::Base.delivery_method = :smtp
+    TestMailer.deliver_from_with_name
+
+    mail = MockSMTP.deliveries.first
+    assert_not_nil mail
+    mail, from, to = mail
+
+    assert_equal 'system@loudthinking.com', from.to_s
+  end
+
   def test_reply_to
     expected = new_mail