Sending email from local system in magneto OR Sending email from magento in local system

1) make sure you did setting in php.ini

i'e

[mail function]
; For Win32 only.
; http://php.net/smtp
SMTP = mail.yourdomine.com
; http://php.net/smtp-port
smtp_port = 25

and in magento go to admin

System->Configuration->System->Mail Sending Setting->host

replace host from localhost to mail.yourdomine.com