I share the same opinions with Dennis at MDBG, so I put his opinion with mine here:

About spam

MDBG does not send unsolicited e-mails. ( Neither do Kaibo2, Chinaw.com, CantonesePod and ChineseBay)

The golden rule about spam:
Never buy anything offered to you in unsolicited e-mail. Spam will not stop to bother us as long as there are people buying things / paying for services offered in unsolicited e-mails!
Tell it to all your friends, family and colleagues!

Ever wondered why hackers break into your computer? Often it is to turn your computer into an automated spam sending machine. In this way spammers can save money on buying computers / data-traffic to send their spam. Spammers are criminals, they cause huge costs to companies and individuals.

If you happen to receive unsolicited e-mail from an address with the ‘mdbg.net’ domain (or chinaw.com or kaibo2.com, ChineseBay.com, khuang.com CantonesePod.com ) , it is most likely a spammer who’s forging his e-mails to look like they’re sent by MDBG (or our domains). Why would spammers do this? All e-mails need a ‘from:’, this e-mail address needs to be from an existing domain. Since spammers don’t like to use their own domain name (if they even have one) they misuse other people’s domains. Technically there’s nothing to stop them from doing this, anyone can sends e-mails to look like it’s from someone else. Yes, you too can send an e-mail from bill.gates@microsoft.com if you’d want to. There’s nothing that MDBG could do to stop spammers from misusing it’s domain name. (They might be abusing our domain names, but I believe somethign that everybody or every victim can do is never buy from spammers or even click their links in their messages.)

Links:

• www.bustspammers.com, how to find out which company sold your e-mail address to spammers
• When spam burns you, why unsolicited bulk e-mail is bad business