SPAM and virus policy
Because of the amount of junk passing through the Internet via SPAM mail and virus mail we have set up a system which tries to remove as much as possible of this. This page describe how we decide whether an email should be bounched.
Virus policy
By default we reject mail which have attached file(s) with the following filename extensions:
- .ad
- .adp
- .asp
- .bas
- .bat
- .chm
- .cmd
- .com
- .cpl
- .crt
- .exe
- .hlp
- .hta
- .inf
- .ins
- .isp
- .js
- .jse
- .lnk
- .mdb
- .mde
- .msc
- .msi
- .msp
- .mst
- .pcd
- .pif
- .reg
- .scr
- .sct
- .shb
- .shs
- .url
- .vb
- .vbe
- .vbs
- .vsd
- .vss
- .vst
- .vsw
- .ws
- .wsc
- .wsf
- .wsh
The above file types are rejected per Microsofts own definition of an unsafe file type. For more information please refer to http://support.microsoft.com/default.aspx?kbid=291369. If you for some reason have an urge to send a file with one of the above filename extensions you may rename it or compress it with gzip, bzip2, zip or a similar compression tool.
If a virus should slip past one of the above mentioned filters it will be scanned with a virus scanner using a reasonably up to date open source virus definition file.
Finally qmail-virusscan scans attachments for an executable signature common to executable formats often used for distribution of viruses.
SPAM Policy
We try to remove as much SPAM as possible by enforcing the following policy:
- All smtp servers delivering mail to our domains are looked up in a number of RBL databases and the spamcop register. These RBL-lists are presently:
- Mail sent with certain mailers known to be used for SPAM-distribution is discarded.
- All MIME-parts of type "text/html" are stripped from mail.
- Some mailinglists are protected by a confirmation system which force people who are not subscribers on a list to confirm their post before it is passed on to the list. Spammers have never been known to confirm their postings. If you would like your list protected in this way please contact staff@dotsrc.org.
- We furthermore plan to introduce a content scanning system known as "spamassassin" as soon as we have the computing power needed to be able to scan the massive amount of email passing through our servers.
If you have questions for this policy please contact us at staff@dotsrc.org.

