TMnet has recently blocking user’s outgoint port 25/tcp traffic. They has limit port 25 access in order to cut down on spam sent through their servers.

This prevents users from sending email using non-streamyx or non-tmnet SMTP servers eg. mail.company.com.my, only smtp.streamyx.com and smtp.tm.net.my will be allowed. Means if you operate or have your own mail server, you must configure your mail server so that it is an open relay.

For more information visit

http://www.tm.net.my/tmnet2006/contents/products-services/news_result.cfm?id=1411