[Koha] E-mail configuration in koha version 3.0.6

Dear Sir, How to do E-mail ( for book remainder purpose) configuration in koha 3.0.6 *Dr. B. RaviivvenkatDeputy LibrarianUniversity LibraryTumkur University, Tumakuru-572103. Joint-Secretary. KULA, Mysuru.Secretary, TUDLA, Tumakuru , Co-ordinator Shodhaganga*