SMTP Error : pub.client:smtp

I have an IS installed on my m/c and when when I use the service : WmPublic/pub.client:smtp to send mails
I get the folowing error :

com.wm.app.b2b.server.ServiceException: javax.mail.MessagingException: Could not connect to SMTP host: , port: 25;
nested exception is:
java.net.SocketException: Software caused connection abort: connect

Following input were specfied :
to
subject
from
mailhost

Certain tips were specified on the forum but could not resolve the issue using them.

Do we need to make any settings to connect to a particular mail server in the IS …

Thanks

Check if the DNS looks up to the smtp host and port…

Sounds like you may not have the server property set for your smtp host?

Are you able to establish the SMTP host?
If not, you need to add the extended setting in your admin page as
watt.server.smtpServer = " your mail server"

Thanks,
Indrani