[Koha] How to set mail receiving option in koha 2.2.9 ?

Dear all, I am trying to implement an online library in my organisation using koha 2.2.9. I need to receive mail when an user reserves and also issued a book. i had set a mail server in the server. In Overdue list, there is a option of email which asks me to sign into either gmail or yahoo. Please any one help me in setting this. Thanks in advance. Note : koha 3.x currently i cannot use. so, please help me with koha 2.2.9 -- Regards, K .Dinesh