[GeoNetwork-users] Error when sending feedback

Hi All,

           I try to use feedback form. When I submit my feedback, the mail
not delivered to my email address. When I'm looking at geonetwork log file.
I see like this

                2008-08-22 08:02:39,929 INFO [jeeves.service] - ->
dispatching to output for : feedback.insert
                2008-08-22 08:02:40,073 INFO [jeeves.service] - ->
transforming with stylesheet :
/usr/local/geonetwork22final/web/geonetwork/xsl/info.xsl
                2008-08-22 08:02:40,261 ERROR
[jeeves.webapp.feedback.insert] - Unable to mail feedback
                2008-08-22 08:02:40,261 ERROR
[jeeves.webapp.feedback.insert] - Exception :
org.apache.commons.mail.EmailException: Sending the email to the following
server failed : smtp.iwsea.org:25
               2008-08-22 08:02:40,261 ERROR [jeeves.webapp.feedback.insert]
- Message : Sending the email to the following server failed :
smtp.iwsea.org:25
               2008-08-22 08:02:40,261 ERROR [jeeves.webapp.feedback.insert]
- Stack : org.apache.commons.mail.EmailException: Sending the email to
the following server failed : smtp.iwsea.org:25
at org.apache.commons.mail.Email.sendMimeMessage(Unknown Source)
at org.apache.commons.mail.Email.send(Unknown Source)
at org.fao.geonet.util.MailSender.run(MailSender.java:67)
Caused by: javax.mail.MessagingException: 501 Syntax: HELO hostname
at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1308)
at com.sun.mail.smtp.SMTPTransport.helo(SMTPTransport.java:785)
at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:327)
at javax.mail.Service.connect(Service.java:236)
at javax.mail.Service.connect(Service.java:137)
at javax.mail.Service.connect(Service.java:86)
at javax.mail.Transport.send0(Transport.java:150)
at javax.mail.Transport.send(Transport.java:80)
... 3 more
2008-08-22 08:02:40,310 INFO [jeeves.service] - -> end transformation
for : feedback.insert
                     But I try to use outlook express or any mail client, I
can send and received mail. What should I do?

Cheers,
Bovorn