I want to setup smtp relay in exchange 2013. Default receive connector is having AnonymousUsers permission. Can I use this connector for smtp relay for multiple applications and printers to send emails? or do I need to create a new connector? This connector is already being used for this purpose however some applications and all printers are not able to submit the message. I see below error message on receive connector. This connector is also receiving external emails from Edge server.<o:p></o:p>
Inbound authentication failed because the client DOMAIN\USERID doesn't have submit permission.
User Name: NULL
Tarpit for '0.00:00:05' due to '535 5.7.3 Authentication unsuccessful
535 5.7.3 Authentication unsuccessful<o:p></o:p>
I checked receive connector is having Ms-Exch-SMTP-Accept-Any-Recipient, Ms-Exch-SMTP-Submit and ms-Exch-SMTP-Accept-Any-Sender for user "NT AUTHORITY\ANONYMOUS LOGON".<o:p></o:p>
Receive connector settings are as below:<o:p></o:p>
AuthMechanism : Tls, Integrated, BasicAuth, BasicAuthRequireTLS,
ExchangeServer
Bindings : {[::]:25, 0.0.0.0:25}
Fqdn : Server1.domain.com
PermissionGroups : AnonymousUsers, ExchangeServers, ExchangeLegacyServers, Custom
RemoteIPRanges : {::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff, 0.0.0.0-255.255.255.255}
TransportRole : FrontendTransport<o:p></o:p>
In testing environment I enabled Authentication method as “Externally Secured” and Permission Group as “Anonymous Users” and it started working. I assume it is failing because of AuthMechanism defined for the connector as failed applications/printers are not able to understand the authentication method. How do I achieve this on single receive connector which is already there in place? Any help is much appreciated. Thanks.<o:p></o:p>