Telekom Malaysia Berhad recently made an annoucement, TM will block OUTBOUND Simple Mail Transfer Protocol (SMTP) traffic or port 25 for all out going e-mails from dynamic IP addresses. Only Outbound SMTP traffic from his proxy will be allowed.
With this implementation, Streamyx or TM customers, must make some changes on your Email client. E-Mail will not be able to send without this change. Please follow instruction below to make this change http://webmail.tm.net.my/info/proxy.html