True or false

$1.$Managing customer relationships should be built into every marketing tactic and activity$\mathrm{.}2.$Successful email marketing is based on two basic customer needs: privacy and permission$\mathrm{.}3.$Data mining and segmentation allow email marketing to be tailored and personalized$\mathrm{.}4.$Email is often the primary point of contact for service$-$related messages$\mathrm{.}5.$Online advertising is only effective for acquiring new customers and not for CRM$.$