Sending spam is not allowed in Poland. Every 'unwanted' information is considered as spam. So the sender needs first permission from recipient before sanding any 'mailshot'
The basic legal act regulating issues related to the transmission of commercial information by electronic post, is the act on electronic services (Dz.U. Nr 144, poz 1204);
10.1. Forbidden is to send unsolicited commercial information addressed to the specified recipient by means of electronic communication, particularly e-mail.
2. Commercial information is considered to be ordered, if the recipient agrees to receive such information, particularly if made available for this purpose, identifying the e-mail address.
Sorry for the google translate ;)
Detailed (Polish language) information is here: pomoc.home.pl/bazawiedzy/internet/131