Diese Stellungsnahme habe ich sooeben von der Swisscom erhalten. Generell stellt sich die Frage was ein öffentlicher Wireless Service tun kann um dieses Problem zu lösen und wie man mit über Wireless versendete E-Mails behandelt so dass 'false-positives' vermieden werden können.
Irgendwelche Ideen wie man das Problem angehen könnte ?
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I've just received this statement to the swisscom pwlan blacklist problem which I've reported earlier to this list. AFAIK there is no easy solution to this problem and to avoid false positives in the spam-scanning prozess.
Any creative ideas how to solve this ?
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Martin Blapp, mb@imp.ch mbr@FreeBSD.org ------------------------------------------------------------------ ImproWare AG, UNIXSP & ISP, Zurlindenstrasse 29, 4133 Pratteln, CH Phone: +41 61 826 93 00 Fax: +41 61 826 93 01 PGP: <finger -l mbr@freebsd.org> PGP Fingerprint: B434 53FC C87C FE7B 0A18 B84C 8686 EF22 D300 551E ------------------------------------------------------------------
Hello Martin,
Well, it's not very creative but I think it's common sense, that if you cannot trust the users sending mail through your mailserver you have a situation comparable to an open-relay server - moreover if Swisscom claims it cannot find the responsible users ("da wir die Verursacher der Spam-Mails nicht eruieren und herausfiltern können").
In this case they have to either require every user who wishes to send mail through their servers to authenticate so they can track the people down when something happens or they have to close relaying completely and ask their users to use a mailserver responsible for their mail address' domain.
Jean-Pierre
On 19 May 2005, Martin Blapp wrote:
I have never used Swisscom's PWLAN. Is this really an anonymous service?
This is not very creative, but why not just check if an IP address is blacklisted before assigning it to a client? - If this yields too many "unusable" addresses, the whole PWLAN service as it is provided today probably needs to be reconsidered.
Oliver
I have never used Swisscom's PWLAN. Is this really an anonymous service?
yes & no: you can either use your mobile number to access the wireless lan (and it gets charged to your phone bill) or you buy the prepaid cards.
i think the problem was not a spammer, but virus-affected users. we got on blacklist several times where ppl announced the virus-propagated spam (or the virus itself) to the blacklists...
-steven