DNN - Yaf Forum Email Issue
DNN Version: 4.9.0
YAF Version: 1.9.1.8 under DNN
ASP.Net 2.0
Hosted at WebHost4Life

I have read all the email issues on this forum and can't find an answer to my question. I have a yaf forum with over 1300 users and over 200,000 messages that I recently migrated from DCFrum+. Everything is working great except for emailing topics, topic watch, etc. I keep getting email eventlog errors.

1. ASP.desktopmodules_yetanotherforumdotnet_pages_ema

System.FormatException: The specified string is not in the form required for an e-mail address.
at System.Net.Mime.MailBnfHelper.ReadMailAddress(String data, Int32& offset, String& displayName)
at System.Net.Mail.MailAddress.ParseValue(String address)
at System.Net.Mail.MailAddress..ctor(String address, String displayName, Encoding displayNameEncoding)
at System.Net.Mail.MailAddress..ctor(String address)
at yaf.pages.emailtopic.SendEmail_Click(Object sender, EventArgs e)

2. ASP.desktopmodules_yetanotherforumdotnet_pages_pos

System.InvalidOperationException: The SMTP host was not specified.
at System.Net.Mail.SmtpClient.CheckHostAndPort()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at yaf.pages.ForumPage.SendMailThread()

3. ASP.desktopmodules_yetanotherforumdotnet_pages_top

System.InvalidOperationException: The SMTP host was not specified.
at System.Net.Mail.SmtpClient.CheckHostAndPort()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at yaf.pages.ForumPage.SendMailThread()

4. ASP.desktopmodules_yetanotherforumdotnet_pages_sea

System.Net.Mail.SmtpFailedRecipientException: Mailbox unavailable. The server response was: Authentication is required for relay
at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at yaf.pages.ForumPage.SendMailThread()

5. ASP.desktopmodules_yetanotherforumdotnet_pages_for

System.InvalidOperationException: The SMTP host was not specified.
at System.Net.Mail.SmtpClient.CheckHostAndPort()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
at yaf.pages.ForumPage.SendMailThread()


When anyone tries to use the option button and send a topic to a friend, the following error occurs: Failed to send email.\n\nTHe specified string is not in the form required for an email address.

The setup on the forum for the server, email address, and password are correct. DotNetNukle also sends out emails without any problems with the same settings.

Any assistance would be appreciated.