hi, 

after registration, verification email could not be sent, and this mean while that the SMTP setting set correctly and i can send email from /admin/newsletters

all of emails set to info@[domain.com]

this is my event log: 

AbsoluteURL:/Default.aspx DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke ExceptionGUID:9ae33474-4d3d-4de7-a404-474c0c63f5c7 AssemblyVersion: PortalId:-1 UserId:-1 TabId:-1 RawUrl: Referrer: UserAgent: ExceptionHash:Btbc2Ms98/jRIzeLmCvMxA== Message:Mailbox unavailable. The server response was: From address must match authenticated address StackTrace: 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) InnerMessage: InnerStackTrace: Source:System FileName: FileLineNumber:0 FileColumnNumber:0 Method: نام سرور : Server2120

whant "From address must match authenticated address"? 

thanks