{protocol,smtp,pop,http}.rb for ruby 1.4 branch

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_4@673 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/net/smtp.rb

@@ -74,6 +74,14 @@ Net::Protocol
     protocol_param :command_type, '::Net::SMTPCommand'
 
 
+    def initialize( addr = nil, port = nil )
+      super
+      @esmtp = true
+    end
+
+
+    attr :esmtp
+
     def sendmail( mailsrc, fromaddr, toaddrs )
       do_ready fromaddr, toaddrs
       @command.write_mail mailsrc, nil
@@ -85,9 +93,6 @@ Net::Protocol
     end
 
 
-    attr :esmtp
-
-
     private
 
 
@@ -104,10 +109,18 @@ Net::Protocol
 
       @esmtp = false
       begin
-        @command.ehlo helodom
-        @esmtp = true
+        if @esmtp then
+          @command.ehlo helodom
+        else
+          @command.helo helodom
+        end
       rescue ProtocolError
-        @command.helo helodom
+        if @esmtp then
+          @esmtp = false
+          retry
+        else
+          raise
+        end
       end
     end