SMTP configuration in portal 7.3

Hi All,

The portal server is unable to send email .

I have followed below steps for this .

I am trying to configure SMTP in portal 7.3 SP08

I have maintained below parameter in

SystemAdminstration ---> System configuration ---->Notificatio & Email --->>

Host Name of the SMTP Server:-------  smtp server host name

I have checked,the port 25 of the smtp server is open

from portal server while i am putting this command

telnet 00.00.00.00 25

pinging correctly but the mail is not triggering 

please help

Tahnks& Regards

Dibyajyoti Nanda