From b3c53ae6f56d1e3710b0111bdb196e98ce2969ea Mon Sep 17 00:00:00 2001 From: "Eric S. Raymond" Date: Fri, 6 Jul 2001 01:18:42 +0000 Subject: Note Paul Howarth's error. svn path=/trunk/; revision=3396 --- todo.html | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/todo.html b/todo.html index 143cea68..ae782b9d 100644 --- a/todo.html +++ b/todo.html @@ -10,7 +10,7 @@
Back to Eric's Home Page Up to Site Map -$Date: 2001/05/30 00:04:47 $ +$Date: 2001/07/06 01:18:42 $

Fetchmail Bugs and To-Do Items

@@ -20,6 +20,23 @@ is now pretty mature and I have many other projects, so I don't personally chase obscure or marginal problems. Help with any of these will be cheerfully accepted.

+Errors in RCPT TO responses aren't handled gracefully. This shows up +if you enable FEATURE(delay_checks, friend) in sendmail, so that you +can accept mail to postmaster from sites otherwise blocked by my +access database. The effect of this feature is that the MAIL FROM: +address is always accepted OK, and any rejection of the sender is +delayed until the RCPT TO: part of the SMTP transaction. This includes +rejects such as 553 for invalid sender address. In this configuration +fetchmail cannot deliver mail with invalid sender addresses, so you'll +get lots of bounce messages when some spammers hit your mailbox (a +pair of bounces every time fetchmail runs; one to FETCHMAIL-DAEMON +generated by sendmail when fetchmail's bounce to the spammer is +rejected, and one postmaster notify for that bounce). The problem is +that fetchmail only recognises the 553 response in reply to MAIL FROM: +and not RCPT TO:, see the unused code near sink.c:690. A really +correct fix would callling a modified version of handle_smtp_error +that doesn't RSET the connection. + Using LMTP alias with a local name that is not a full name fails horribly (the LMTP port never gets stripped off the name). @@ -66,7 +83,7 @@ bug-tracking page for fetchmail lists other bug reports.

Back to Eric's Home Page Up to Site Map -$Date: 2001/05/30 00:04:47 $ +$Date: 2001/07/06 01:18:42 $

Eric S. Raymond <esr@thyrsus.com>
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