Saying this is a move to prevent spam dissemination, New Zealandís largest internet provider Xtra is to commence filtering e-mail traffic on Port 25.
Port 25 is an Internet port dedicated to sending e-mail. However, it is also used by spammers to send unwanted emails, when relaying messages through unprotected computers running e-mail servers, sometimes without the owner's knowledge. Xtra says new viruses and worms are also often spread across the Internet via this port.
Xtra Security spokesman Luke Baxter says although Xtraís anti-spam filter detects, marks-up or removes over 20 million pieces of spam a week, some spam still gets through.
The filtering of Port 25 should not affect any Xtra services, such as XtraMail, or any web based e-mail programmes such as Hotmail.
Port 25 will will be filtered from 26 April and will be extended to all Xtra customers over several weeks. Mr Baxter says customers donít need to do anything to benefit from the move.