Azure Pack Self-Serve Password Reset

Question

I currently have Azure Pack installed and I am trying to setup the notification for users to reset their passwords, account validation, and forgot password.I have exchange 2013 internally that I would use as a relay, and when I setup the relay in azure pack
and test it work. but when trying to get the password as a user from tenant site it fails.
In azure management site under outbox i get the following message.
Any help is appreciated.
Exception: System.Net.Mail.SmtpException: Service not available, closing transmission channel. The server response was 4.3.2 Service not available at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint ....

Answer 1

Thanks for the reply, Mark!
Just for sanity I deleted and made a new receive connector with the following settings.
Internal-Relay
Security -> Anonymous Users
Scoping -> Remote Network Settings
                 10.0.0.0/24
             -> Network Address bindings
                  (All available IPv4) 25
When I test from Service Management Portal
              -> User Accounts -> Notifications -> Settings -> Test
and enter an email address it sends successfully. I have configured as follows
IP of mail server, port 25, no ssl, Basic Auth, Username
[email protected] but an actual domain account, password.
On mail server I have run Get-ReceiveConnector "Your Receive Connector" | Add-ADPermission -User "NT AUTHORITY\ANONYMOUS LOGON" -ExtendedRights "Ms-Exch-SMTP-Accept-Any-Recipient" for the anonymous and for the account that I
have specified.
Like I said it works when I test from Service management Portal, But when I try to use it from the tenant from end to say reset a password or validate account when registering It doesn't work. I am not sure what context it uses to send the mail.
This is the error which tells me its a relay problem but I am not sure what I am missing and why it works when I test from the management portal.
Exception: System.Net.Mail.SmtpFailedRecipientException: Mailbox unavailable. The server response was: 5.7.1 Unable to relay 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 Microsoft.WindowsAzure.Server.Notification.NotificationHandlers.EmailNotificationHandler.SendEmailAsync(SmtpAccount smtpAccount, MailMessage mailMessage)
at Microsoft.WindowsAzure.Server.Notification.NotificationHandlers.EmailNotificationHandler.<HandleNotificationAsyncInternal>d__3.MoveNext() at Microsoft.WindowsAzure.Management.TaskSequencer.<>c__DisplayClass1e`1.<RunSequenceAsync>b__1d(Task
previousTask); Message: Mailbox unavailable. The server response was: 5.7.1 Unable to relay