Weekly spam summary on January 7th, 2006
It's time for the first weekly spam summary of the new year, so let's see what sort of a start 2006 is off to.
This week we received 14,639 email messages from 198 different IP addresses. Our SMTP server handled 30,023 sessions from 3,122 different IP addresses. Message volume is up some since last week (not surprising with people coming back to work) and session volume is holding steady.
Connection volume is down from last week: 201,000 connections from at least 58,500 different IP addresses, although with a highwater of 20 connections being checked at once. By day we get:
I have no explanation for the day to day numbers, although we do have the traditional Thursday jump. It's wierd to see the different IP address count spike so sharply without a connection spike to go with it.
Kernel level packet filtering top ten:
Host/Mask Packets Bytes 184.108.40.206 17983 1079K 220.127.116.11 12414 745K 18.104.22.168 10004 509K 22.214.171.124 9387 411K 126.96.36.199 8249 396K 188.8.131.52 6840 356K 184.108.40.206 6579 335K 220.127.116.11 6449 297K 18.104.22.168/24 5956 275K 22.214.171.124 5454 251K
- only 126.96.36.199 reappears from before, still without a good IP to name mapping.
- 188.8.131.52 is also without good IP to name mapping.
- 184.108.40.206, 220.127.116.11, and 18.104.22.168 are all considered 'dialup' dynamic address machines.
- 22.214.171.124 is a PacBell DSL machine that kept trying to send us mail from an address that had hit our spamtraps.
- 126.96.36.199, 188.8.131.52, and 184.108.40.206 had unresolvable
Connection time rejection stats:
36555 total 18969 dynamic IP 10916 bad or no reverse DNS 4114 class bl-cbl 528 class bl-spews 467 class bl-sbl 310 class bl-dsbl 272 class bl-sdul 52 class bl-ordb 30 class bl-njabl 14 class bl-opm
Given the overall volume drop from last week, I think that these stats are not particularly surprising. There are no really aggressive single IP addresses, and the CBL doesn't stand out as much as it did last week; only 7 of the top 30 most connecting IP addresses are on it.
|what||# this week||(distinct IPs)||# last week||(distinct IPs)|
It looks like we're still getting forged as the
MAIL FROM origin by
The Hotmail spammers seem to have ended their holidays too, judging from the Hotmail stats for this week:
- 2 emails accepted, one of which was a backscatter bounce.
- 275 messages rejected because they came from non-Hotmail email addresses.
- 62 messages sent to our spamtraps.
- 4 messages refused because their sender addresses had already hit our spamtraps.
- 5 messages refused due to their origin IP address (four for being in the SBL, one for being in the CBL).
This is broadly consistent with the volume from the week before last. So much for any hope that Hotmail was doing something to deal with their spam problem over the Christmas to New Years break.
(In fact they were doing something last week: they were making it more difficult to report spam to Hotmail. Now you have to use firstname.lastname@example.org instead of email@example.com if you want them to take any action, or so their autoreply now says.)