On Jun 22, 2009, at 11:59 AM, [email protected] wrote:
> Message from my ISP:
>
> "SPAM has gotten worse lately due to the fact that spammers have
> figured out a way for spam to appear as if it's coming from the
> person receiving the spam. This change in how spammers can now send
> spam has necessitated that we now check all Outgoing Emails for
> spam. In the past we never checked our users Outgoing emails for
> spam but now we must begin doing that to stop this latest onslaught
> of spam messages.
> Please bear with us if there are problems as we will correct them as
> soon as possible."
Uhhh, wow. We've been checking everything that goes through our server
for a couple years now, precisely because of that problem.
Just as a public info notice, this is what the problem looks like from
a mail admin's perspective...
This is last night's daily report frorm our mail scanning system.
Bottom line, just 3% of all mail sent to our domain in the previous 24
hours was actually delivered to people's inboxes.
The first three are Realtime Blacklist blocks against known spam
sources. That alone delete 96% of all email sent to us.
Even if the apparent 'From' line is internal, it has to actually
arrive from outside our network, unless it's a local host infected
with malware. I suspect there would be a lot more of those on an ISP's
residential network than there are here, where we can keep tighter
control on what AV software is run, etc.
-------------------------------
SMTP Anti-Spam/Anti-Virus Report
RBL RESULTS
-----------
Number of Messages Dropped by Barracuda Networks
79085
Number of Messages Dropped by Spamhaus
9819
Number of Messages Dropped by Sorbs Dialup List
101
AMAVIS/SPAMASSIN RESULTS
-----------------------
The following is mail that was not dropped by RBLs.
These were all scanned by Spamassassin.
****** Summary
*************************************************************************************
2634 Clean passed 83.73%
18 Bad header passed 0.57%
2652 Ham ----------------------------------- ------- 84.30%
117 Spam passed 3.72%
349 Spam blocked 11.09%
466 Spam ---------------------------------- ------- 14.81%
28 Malware blocked 0.89%
28 Malware ------------------------------- ------- 0.89%
3146 Total messages scanned 100.00%
======== ==========================================================
100 SpamAssassin bypassed
--
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group
Institutions do not have opinions, merely customs
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