In SBS 2008, AuthAnvil is unable to send email to external domains

Issue

When installing AuthAnvil on an SBS 2008 box allowing Anonymous Users, mail server tests to an external domain fail and the Setup Log shows the SMTP error "Unable to relay 5.7.1"

Cause

The AuthAnvil application is not permitted to relay mail messages through exchange 2007.

Resolution

1. Open up the Exchange Management Console
2. Expand Server Configuration
3. Click Hub Transports
4. In the "Receive Connectors" tab, right-click on the "Default <servername>" and select Properties. (ie: "Default CONTOSO")
5. Click the Permission Groups tab
6. Check Anonymous users

At this point, you will need to grant relay rights to the anonymous user following the configuration for Option 2 described in this Microsoft blog post for Exchange 2007: http://blogs.technet.com/b/exchange/archive/2006/12/28/3397620.aspx

The Exchange shell command will look like this:

Get-ReceiveConnector "(AuthAnvil Connector Name)" | Add-ADPermission -User "NT AUTHORITY\ANONYMOUS LOGON" -ExtendedRights "ms-Exch-SMTP-Accept-Any-Recipient"

Affects

SBS 2008 servers running any version of AuthAnvil 2FA

Questions?

If you have any questions or need some help, we would be happy to assist. Open a case at help.scorpionsoft.com or send an email to support@scorpionsoft.com.