env_From incrementing

John Doherty jdoherty@gstype.com
Thu Dec 8 20:09:35 UTC 2005


Hi --

Over the past few days, I've been having more false positives with DCC
that I have had before. I may be misunderstanding something, and if
so, sorry for the false alarm.

What I'm seeing is that the env_From count is incrementing for every
unique, diferent message from the same sender. Eventually, this
exceeds my DCCM_REJECT_AT threshold (which is very low) and their
messages start being rejected.

Looking at the logged messages for one sender, I see this:

# grep "  env_From:" $(grep -l kailacat msg.*)
msg.3HiJxG:   env_From: 070d67f5 175c2605 92be632c 27bff934      11
msg.3HiJxT:   env_From: 070d67f5 175c2605 92be632c 27bff934      12
msg.3HiJxf:   env_From: 070d67f5 175c2605 92be632c 27bff934       6
msg.3HiJxo:   env_From: 070d67f5 175c2605 92be632c 27bff934       7
msg.3HiJxv:   env_From: 070d67f5 175c2605 92be632c 27bff934       8
msg.3HiJxw:   env_From: 070d67f5 175c2605 92be632c 27bff934       9
msg.3HiJxz:   env_From: 070d67f5 175c2605 92be632c 27bff934      10
msg.3HiJyi:   env_From: 070d67f5 175c2605 92be632c 27bff934      13

This doesn't seem right to me. Each of these messages are different,
as their body checksums show:

# grep "  Body:" $(grep -l kailacat msg.*)     
msg.3HiJxG:   Body: 88318bd9 41da75be dc7aa958 9a9466e2       0
msg.3HiJxT:   Body: f0ebdd3d 68c87c09 2bf9889e b64f8675       0
msg.3HiJxf:   Body: fc474045 88d2a470 761a79aa c96bea71       1
msg.3HiJxo:   Body: b687eaf1 45346f6f 4fda8308 116f4463       0
msg.3HiJxv:   Body: e977a4c7 7a90c156 3f6f15bd 9c5ea149       0
msg.3HiJxw:   Body: e977a4c7 7a90c156 3f6f15bd 9c5ea149       1
msg.3HiJxz:   Body: b7760edf c540c5d8 775535ba 84757502       0
msg.3HiJyi:   Body: f66afb20 68f30ab1 3d93dbb6 36c86295       0

So again, maybe I'm misunderstanding something, but I don't see why
the env_From: count is incremented for each one.

I'm using DCC 1.3.22 from 11/27/2005. I do not run my own DCC server
since my system is too small for that, and just use DCCM hooked into
sendmail 8.12.11. I'd be happy to provide any further information that
would be useful.

Thanks.

-- John




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