I would start with a manual test of your SMTP server. From the box hosting the BugNET web application, try to telnet to the SMTP server.
telnet [hostname or IP] 25
Does it allow you to connect? No? Check your IP based access restrictions on the SMTP server or look at potential issues with firewalls blocking communication over TCP port 25.
If you can connect, issue the following commands to try and send off an email:
ehlo {enter}
mail from:[you can enter a dumby no_reply address for your domain] {enter}
rcpt to:[your own email address] {enter}
data {enter}
[email message body text] {enter]
.{enter}
{enter}
Pay attention to any messages returned by the SMTP server. If it complains about being unable to relay, check for any relay restrictions on the SMTP server.
telnet smtpServer 25
220 smtpServer Microsoft ESMTP MAIL Service, Version: 5.0.2195.6713 ready at
Tue, 23 Mar 2010 12:32:37 -0400
ehlo
250-smtpServer Hello [555.555.555.55]
250-TURN
250-ATRN
250-SIZE 10485760
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250 OK
mail from: no_reply@xxx.xx
250 2.1.0 no_reply@@xxx.xx....Sender OK
rcpt to:your_email@address.com
250 2.1.5 your_email@address.com
data
354 Start mail input; end with <CRLF>.<CRLF>
Testing SMTP relay
.
250 2.6.0 <smtpServerYDge6v00000038@smtpServer> Queued mail for delivery
quit
The email is queued and sent.