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39 messages in net.sourceforge.lists.courier-maildrop[maildropl] Re: Maildrop EX_TEMPFAIL| From | Sent On | Attachments |
|---|---|---|
| ha...@newmail.tvnet.hu | Jul 5, 2002 11:37 pm | |
| Derrick 'dman' Hudson | Jul 6, 2002 9:05 am | |
| ha...@newmail.tvnet.hu | Jul 8, 2002 12:56 am | |
| ha...@newmail.tvnet.hu | Jul 8, 2002 6:40 am | |
| Derrick 'dman' Hudson | Jul 8, 2002 7:07 am | |
| Ben Rosengart | Jul 8, 2002 7:09 am | |
| Matthias Andree | Jul 8, 2002 8:24 am | |
| Matthias Andree | Jul 8, 2002 8:25 am | |
| Ben Rosengart | Jul 8, 2002 8:35 am | |
| Matthias Andree | Jul 8, 2002 8:51 am | |
| Sam Varshavchik | Jul 8, 2002 3:03 pm | |
| Ben Rosengart | Jul 8, 2002 3:32 pm | |
| Sam Varshavchik | Jul 8, 2002 4:15 pm | |
| Matthias Andree | Jul 8, 2002 5:10 pm | |
| Sam Varshavchik | Jul 8, 2002 6:09 pm | |
| Ben Rosengart | Jul 8, 2002 6:20 pm | |
| Sam Varshavchik | Jul 8, 2002 6:28 pm | |
| Ben Rosengart | Jul 8, 2002 6:44 pm | |
| Sam Varshavchik | Jul 8, 2002 6:51 pm | |
| ha...@newmail.tvnet.hu | Jul 9, 2002 3:56 am | |
| Matthias Andree | Jul 10, 2002 2:47 am | |
| Matthias Andree | Jul 10, 2002 2:49 am | |
| Matthias Andree | Jul 10, 2002 3:05 am | |
| Derrick 'dman' Hudson | Jul 10, 2002 7:40 am | |
| Matthias Andree | Jul 11, 2002 2:51 am | |
| Derrick 'dman' Hudson | Jul 13, 2002 9:00 am | |
| Matthias Andree | Jul 14, 2002 7:47 am | |
| Derrick 'dman' Hudson | Jul 15, 2002 8:19 pm | |
| Sam Varshavchik | Jul 15, 2002 9:19 pm | |
| Ben Rosengart | Jul 16, 2002 6:52 am | |
| Sam Varshavchik | Jul 16, 2002 7:22 am | |
| Ben Rosengart | Jul 16, 2002 8:09 am | |
| Ben Rosengart | Jul 16, 2002 11:24 am | |
| Sam Varshavchik | Jul 17, 2002 9:59 am | |
| Ben Rosengart | Jul 17, 2002 12:29 pm | |
| Matthias Andree | Jul 17, 2002 3:27 pm | |
| Matthias Andree | Jul 17, 2002 3:33 pm | |
| Matthias Andree | Jul 17, 2002 3:34 pm | |
| Matthias Andree | Jul 18, 2002 12:21 pm |
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| Subject: | [maildropl] Re: Maildrop EX_TEMPFAIL | Actions... |
|---|---|---|
| From: | Sam Varshavchik (mrs...@courier-mta.com) | |
| Date: | Jul 8, 2002 6:51:40 pm | |
| List: | net.sourceforge.lists.courier-maildrop | |
Ben Rosengart writes:
On Mon, Jul 08, 2002 at 09:28:32PM -0400, Sam Varshavchik wrote:
Ben Rosengart writes:
Properly designed MTAs do not accept mail for delivery to nonexistent mailboxes in the first place, and the MDA never sees invalid recipients.
Do you have a reference for this, or is it just your own idea of proper design? People sometimes choose not to expose user lists to the MTA for security reasons.
Exactly what kind of a "security reason" would involve turning an MTA into a proxy mailbomb source?
Isolating potentially-sensitive information from the network.
And how much of a benefit would an extra few seconds of CPU time provide (instead of an outright refusal, just collect a nice bounce a few packets later), especially at the expense of compromising the security of your relay to the point that it can now be used as a proxy mailbomb source?
Besides, I'm fairly confident that once a mail relay with such a configuration is used to launch a few hefty p0rn mailbombs @fbi.gov, the owner of the relay would reevaluate the benefit of supposedly hiding such "potentially-sensitive" information.
Why don't you ask Wietse Venema why he supports this type of configuration in Postfix? (In fact, I believe it's the default.) I'm sure he can answer better than I can.
Apparently he forgot that security through obscurity doesn't work.
-- Sam