problem with Return-Path: <>

1) It seems a few mailer-daemons set: Return-Path: <>
2) it seems a few sendmails refuse such return-paths

ASK may try to transfer from (1) to (2), and then fail on a broken
pipe like this:


Traceback (most recent call last):
  File "/usr/bin/ask.py", line 71, in ?
    rc = ask.filter(sys.stdin)
  File "/usr/lib/ask/askmain.py", line 150, in filter
    self.msg.deliver_mail("Message from Mailer-Daemon")
  File "/usr/lib/ask/askmessage.py", line 474, in deliver_mail
    self.mail.deliver_mail(self.config.rc_mymailbox, self.tmpfile,
custom_header)
  File "/usr/lib/ask/askmail.py", line 170, in deliver_mail
    fh_mbox.write(buf)
IOError: [Errno 32] Broken pipe


I wrote the small patch attached as a workaround. Any comments
welcome!



-- 
"Je n'ai fait cette lettre-ci plus longue que parce que je n'ai pas eu
le loisir de la faire plus courte." -- Blaise Pascal

--- askmail.py	2004/02/09 13:46:34	1.1
+++ askmail.py	2004/02/09 13:57:11
@@ -156,8 +156,14 @@
 		
 		in_headers = 1;
 
+		returnpat = re.compile("^return-path:.*<>")
+
 		while 1:
 			buf = fh_mailfile.readline();
+			
+			## nullmailer does not want an empty return-path
+			if (in_headers and returnpat.match(buf.lower())):
+				buf = "Return-Path: <" + self.config.rc_mymails[0] + ">\n"
 
 			if (buf == ''):
 				break