I got below error when I submit defect in Bugzilla. I used IIS and tried
both IP and machine name in parameters/email/smtpserver field.

Thank you!


Bugzilla has suffered an internal error. Please save this page and send
it to xxx@xxx.xxx with details of what you were doing at the time this
message appeared.

URL: http://projectmg/process_bug.cgi

There was an error sending mail from 'Bugzilla email@projectmg' to
'xxx@xxx.xxx':Can't send data