SMTP Settings (ISP which Blocks Port 25, eg: TMnet Malaysia and Certain Part Of Indonesia)

587 or 2525 

If site is hosted by Axon, detail below

Please change the default port 25 to port 587 - For Linux Server
Please change the default port 25 to port 2525 - For Windows Server
Outgoing server requires authentication is optional


More info at http://www.postcastserver.com/help/Port_25_Blocking.aspx