The form and list module has been my goto solution for a long time.  However, now whenever I use the latest version it consistently doesn't work any more for me.  Everything acts like it sends, confirmation message, saves to db, but it doesn't arrive via email.  I know my smtp setup is working from other modules on the same installs, and emails are sent along with my smtp tests. 

If I review the site log it shows an error for that module and on that page (red) and gives a message of  "Mailbox unavailable. The server response was: Sender is not allowed." 

Any suggestions on how to get this thing working again? I have numerous sites now not working. 

 Thanks.

Sure.  here you go.  thanks.

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InnerException: Mailbox unavailable. The server response was: Sender is not allowed.

FileName:

FileLineNumber: 0

FileColumnNumber: 0

Method: System.Net.Mail.MailCommand.CheckResponse

StackTrace:

Message: System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: Sender is not allowed. at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage message) at DotNetNuke.Services.Mail.Mail.SendMailInternal(MailMessage mailMessage, String subject, String body, MailPriority priority, MailFormat bodyFormat, Encoding bodyEncoding, IEnumerable`1 attachments, String smtpServer, String smtpAuthentication, String smtpUsername, String smtpPassword, Boolean smtpEnableSSL)

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hmmm.  In the past I have never configured the module to use the same smtp email address and the sender email address.  They have always been different. 

I configure the smtp host settings, test it, and then configure the Form/List module with a sender email address and to email address.  Are you suggesting these need to be the same now? 

I also use the feedback module in much the same way and on all of these installs that module (feedback) sends just fine. 

Not sure.  thanks.