Hi, I am running DNN 4.5.3. I am unable to  sending a confirmation email (and forgot password) when a user registers on the site. I am on a hosted environment and the hosting provider provides SMTP capabilies on the web server. What is really interesting is that I am able to get some email sent out through DNN but not all. I configured the Host Settings and I can execute the "test" and I get a response email in the host account and I gett a message display that the email was successful.  Out of the event viewer in DNN I get the following:  (Any insights would be great)  -- thanks gc

AssemblyVersion: 04.05.03
PortalID: 0
PortalName: DNNSite
UserID: -1
UserName:
ActiveTabID: 36
ActiveTabName: Home
RawURL: /Home/tabid/36/ctl/Register/Default.aspx?returnurl=%2fdefault.aspx
AbsoluteURL: /Default.aspx
AbsoluteURLReferrer: http://olive-branch.org/Home/tabid/36/ctl/Register/Default.aspx?returnurl=%2fdefault.aspx
UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1; .NET CLR 2.0.50727; MS-RTC LM 8)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: f3ad064e-f654-41d7-89ef-a9289ac5908c
InnerException: Transaction failed. The server response was: 5.7.1 <techzone@sbcglobal.net>: Relay access denied
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Net.Mail.RecipientCommand.CheckResponse
StackTrace:
Message: System.Net.Mail.SmtpException: Transaction failed. The server response was: 5.7.1 <techzone@sbcglobal.net>: Relay access denied at System.Net.Mail.RecipientCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage message) at DotNetNuke.Services.Mail.Mail.SendMail(String MailFrom, String MailTo, String Cc, String Bcc, MailPriority Priority, String Subject, Mailformat Bodyformat, Encoding BodyEncoding, String Body, String Attachment, String SMTPServer, String SMTPAuthentication, String SMTPUsername, String SMTPPassword, Boolean SMTPEnableSSL)
Source:
Server Name: H7854-55

I replied to other other post you made here:

http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/108/threadid/256167/scope/posts/Default.aspx

Hope this helps