[H-GEN] Mail rejected due to bare linefeeds
Stuart Longland
stuartl at longlandclan.hopto.org
Thu Aug 12 05:05:16 EDT 2004
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Greg Black wrote:
| On 2004-08-10, Stuart Longland wrote:
|
|> Lately, I've noticed a number of people have been getting problems
|>receiving any of my emails, and looking in the logs, I'm seeing a lot of
|>messages like the following:
|>
|>[...]
|>
|>I'm using QMail as the SMTP server
|
| [...]
|
| The message above doesn't mean anything. It's just a software
| error message and we all know they have nothing much to do with
| reality.
Hrmm, servers which send messages that are straight plain wrong. That
is, umm, helpful.
| What you need to do is a bit of observation. Run tcpdump and
| see what's happening on the wire. Network delays and timeouts
| can have weird effects, and they can occur anywhere along the
| path between the two SMTP hosts.
I managed to get a dump of what happens when I send to my yahoo address
(sjlongland(a)yahoo*com*au -- anti-spam measure: replace (a) and * with
appropriate symbols). Oddly enough, I can send back and forth between
this address and my Yahoo one without any hassles whatsoever.
| However, whatever the problem, you can be sure that qmail won't
| send bare linefeeds unless you've patched it to do that.
At least I don't think it's patched that way. I've looked at the Gentoo
ebuild, but there's no mention of such a patch. Numerous security fixes
here and there, but nothing mentioning linefeeds. I think my
installation is very much clean.
I'm currently going to see if I can register a couple of email addresses
on the offending servers and do some more trials, but in the meantime, I
think I'll also start harrassing the relevant helpdesks.
- --
+-------------------------------------------------------------+
| Stuart Longland -oOo- http://stuartl.longlandclan.hopto.org |
| Atomic Linux Project -oOo- http://atomicl.berlios.de |
| - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
| I haven't lost my mind - it's backed up on a tape somewhere |
+-------------------------------------------------------------+
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