T-Online (German provider) enhances spam protection, and blocks legit listmail

Just a quick pointer to an article in German for those 350+ Subscribers with a t-online-Mailaddress. T-Online verbessert den Spamschutz - Legitime Mails werden abgelehnt. Summary: T-Online now blocks non-spam Mail from Debians Listserver.

March 31, 2008 · Cord

Today i kicked 560 Mailaddresses off lists.debian.org ...

… because they are bouncing. In my ongoing attempt to investigate and fix problems of our mailinglist-server, i found that we only had a working bounce-detection for lists starting debian-* minus debian-private and the three digest-lists. So i rewrote some parts of the bounce detection: We now have four categories of lists: high (30 or more mails a day) medium (20 or more mails a week) low (10 or more mails a month) very-low (the rest) for these four categories we calculate a spam-rate depending on the number of distributed messages and the number of bounces in the timerange of 24 hours for ‘high’ lists, 7 days for ‘medium’ lists, 30 days for ’low’ lists and 90 days for ‘very-low’ lists. ...

January 26, 2008 · Cord

Spamwaves on Lists or 'oops, i did it again'

Just a quick note: while wading through the list-archives, drop-boxes and list-configuration to find false positives and possiblities to optimise our mailinglists spam level i accidently removed the inclusion of our spamfilters from most lists. I appologise for this. Luckily zobel discovered my error and fixed it at 14:30 CET.

January 8, 2008 · Cord

private Spamstats April 2007

you see my Spamstats for the time i run an own server for my domain. The input consists mainly from cord@Wunder-Nett.org that is in existence since mid-1996, and a (tuned) catch all on cord.de. Unreadable is the stuff encoded as russian, chinese, korean, … Backscatter are Bounces due to misused Mailadresses. Virusspam is the stuff ClamAV catches. Spam is recognized by bogofilter Dupes were Mails with the same Message-Id in a short time period. Ham are those messages that survived the other filters. In 05/2004 i had a big downtime due to broken Harddisk and/or cheap IDE-Cables (which was finally solved in 2006). In 11/2004 i became Debian-Listmaster, and forwarded the listmaster-mails to my system. In 08/2005 i stopped forwarding listmaster-Mail and the admin-mail from LUG-OWL and let them drop into a local Mailbox on the specific servers. In 06/2006 The power supply of my server died, and HaJo had a fitting spare device, so i took it to the local hardware gods (C&M sorry, only Flash) and they implanted it, they also replaced all Fans (6 of which 4 were stuck) and replaced the IDE-Cables. Now i even could switch on DMA without risking a crash. (Man, 3years of crippled server). As you see, the system is now able to accept even more spam. In 12/2006 i added greylisting on my server. My 2nd MX currently doesn’t do greylisting. ...

May 4, 2007 · Cord

Debian Weekly News is late? - Blame listmasters!

Hi. We were notified that German DWN, and the Original DWN weren’t sent out. Investigation showed that Diplomats (in German translation Diplomaten) matched the bad word ‘Diploma’, so it is dropped in our spambox. I resent German DWN yesterday and the Original DWN some minutes ago. sorry for the inconvinience.

May 1, 2007 · Cord