Telekom Malaysia Berhad (TM) email accounts has been deactivated since 1 December 2013.
All TM E-mail related services (namely streamyx.com, tm.net.my, hsbb.com.my, bluehyppo.com and unifi.my) no longer valid so user will receive bounce back error message when send email to above email accounts.
Reference: https://www.tm.com.my/OnlineHelp/Announcement/Pages/DISCONTINUATION-OF-TM-E-MAIL-SERVICES.aspx