Telekom Malaysia Berhad (TM) email accounts have been deactivated since 1 December 2013.
All TM email-related services (including streamyx.com, tm.net.my, hsbb.com.my, bluehyppo.com, and unifi.my) are no longer valid; therefore, users will receive a bounce-back error message when attempting to send emails to these accounts.
Reference: https://www.tm.com.my/OnlineHelp/Announcement/Pages/DISCONTINUATION-OF-TM-E-MAIL-SERVICES.aspx