K-9 Mail yog ib daim ntawv thov email ywj pheej rau Android operating system. Nws tau tsim muaj raws li Dawb / Qhib Qhov Chaw Hauv Software hauv qab Apache-2.0 daim ntawv tso cai. Qhov kev zov me nyuam tau ua lag luam raws li kev hloov pauv ntau dua rau daim ntawv thov xa ntawv uas muaj nyob hauv ntau lub xov tooj. Nws txhawb POP3 thiab IMAP mailboxes thiab txhawb IMAP IDLE rau cov ntawv ceeb toom ntawm lub sijhawm.