My name is Jeremy. I've installed version 2.3.6.7 on my site and am experiencing difficulties in getting the email configured properly.

I've included relevant excerpts from the User and Web config files below as well as the application's log file entry. I cleared the log prior to trying to send an email so it's all that is in the log. I've reviewed the Email Configuration article but I must be missing something. According to my host, I should need to enter the server address and standard port 25. No username/pwd is required. Any help is greatly appreciated. (Domain name intentionally masked below)

Host Info:
IIS7 (Running in Classic Mode)
MySQL
.NET 4

User.Config Setting:
<add key="SMTPServer" value="smtpmailer.hostek.net" />
<add key="SMTPRequiresAuthentication" value="false" />
<add key="SMTPPort" value="25" />
<add key="SMTPUser" value="" />
<add key="SMTPPassword" value="" />

Web.Config Setting:
<system.net>
<mailSettings>
<smtp from="noreply@mydomain.com">
<network host="smtpmailer.hostek.net" port="25" password="" userName="" />
</smtp>
</mailSettings>
</system.net>

CMS Log File Entry:
2011-09-03 14:45:13,125 ERROR mojoPortal.Net.Email - error sending email to noreply@mydomain.com from web@mydomain.com, will retry
2011-09-03 14:45:16,135 ERROR mojoPortal.Net.Email - all retries failed sending email to noreply@mydomain.com from web@mydomain.com, message was: Webmaster<br />web@.com<br /><br /><p>
test message</p>
<br /><br />HTTP_USER_AGENT: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)<br />
System.Net.Mail.SmtpException: Failure sending mail. ---> System.IO.IOException: Unable to read data from the transport connection: net_io_connectionclosed.
at System.Net.Mail.SmtpReplyReaderFactory.ProcessRead(Byte[] buffer, Int32 offset, Int32 read, Boolean readLine)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLines(SmtpReplyReader caller, Boolean oneLine)
at System.Net.Mail.SmtpReplyReaderFactory.ReadLine(SmtpReplyReader caller)
at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
--- End of inner exception stack trace ---
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at mojoPortal.Net.Email.Send(SmtpSettings smtpSettings, MailMessage message)