SimpleNews: Unable to send e-mail.

Salve ragazzi! ho installato il modulo simpleNews per gestire la newsletter ma riscontro il seguente problema...

Quote:

* warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in C:\Programmi\Apache Software Foundation\Apache2.2\htdocs\marcheweek\includes\mail.inc on line 193.
* Unable to send e-mail. Please contact the site administrator if the problem persists.
* warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in C:\Programmi\Apache Software Foundation\Apache2.2\htdocs\marcheweek\includes\mail.inc on line 193.
* Unable to send e-mail. Please contact the site administrator if the problem persists.

devo installare il modulo per inviare le mail insieme a simpleNews??? se si quale??

oppure il problema potrebbe essere che sono in locale???

spero che qualcuno sappia darmi una delucidazione a cio!!!! grazie!!!!!!