Hello,
Tree free module should help you
http://www.dolistore.com/lang-en/autres/260-MailChimp-pour-Dolibarr.html
http://www.dolistore.com/crm-customer-relationship-management/351-Lead.html
http://www.dolistore.com/crm-customer-relationship-management/385-eMailing---Advanced-Target-Mailing.html
Regards
