https://www.google.com/adsense/terms

Pod tačkom 5. Prohibitet Uses između ostalog piše:

You shall not, and shall not authorize or encourage any third party to: ... (v) display any Ad(s), Link(s), or Referral Button(s) on any error page, on any registration or "thank you" page (e.g., a page that thanks a user after he/she has registered with the applicable Web site), on any chat page, in any email, or on any Web page or any Web site that contains any pornographic, hate-related, violent, or illegal content;

Ili jedostavnije, ne sme se koristiti u Emailu. Nije zgoreg uvek pročitati kompletan Terms & Conditions.

Hvala :)

Ispao sam lenj :)

Hvala jos jednom ;)

Mada ima najava da ce da puste i tu opciju.
To sam procitao pre 2-3 meseca na blogu http://jensense.com, koji je po meni najbolje mesto za takve informacije.