(OT) Mail got blocked because of SORBS/DYNABLOCK
Reuben D. Budiardja
techlist at voyager.phys.utk.edu
Wed Mar 31 20:39:08 UTC 2004
Hi all,
Sorry if this is a little bit OT, but I know some people is knowledgeable
about this.
I have a user who's trying to send email and found out the email got blocked
by spamassasin (I think), with the following test:
tests=RCVD_IN_DYNABLOCK,RCVD_IN_SORBS ver=2.63
That user use my SMTP server, with authentication, to relay the mail. After
googling a bit, I figured out that the first test is just and implementation
of RBL, and the second probably check it with the SORBS database.
I know my SMTP server is clean, and not listed in RBL or SORBS database (I
checked that).
But when I check the originating IP of this user (he uses his own ISP) here:
http://www.dnsbl.us.sorbs.net/cgi-bin/lookup?js&IP=
I found entry in the "Dynamic IP Space " section. Looks like his ISP, or even
his IP block is in the list of SORBS.
And this
http://mail-abuse.org/cgi-bin/lookup
shows his originating IP in the DUL list (whatever that is).
But the funny thing is, this user has another email account using another SMTP
server, and when he send mail from that account it does not trigger the
RCVD_IN_DYNABLOCK rule. So I don't quite understand it.
So my question basically, does changing SMTP server for his account (using his
ISP SMTP server for example) help fixing this problem? If yes, why? if the
rule looks at the originating IP instead of the SMTP, any SMTP server that he
uses will still trigger the rule, won't it ? And why does his other account
(with different SMTP) does not trigger that some DYNABLOCK rule?
Any help on this will be greatly appreciated.
RDB
--
Reuben D. Budiardja
Department of Physics and Astronomy
The University of Tennessee, Knoxville, TN
---------------------------------------------------------
"To be a nemesis, you have to actively try to destroy
something, don't you? Really, I'm not out to destroy
Microsoft. That will just be a completely unintentional
side effect."
- Linus Torvalds -
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