How to search for SMTP Servers in a domain programmatically using ADSI?

Here is a sample vbscript using which we can get SMTP servers instance names in a particular domain pragmatically via ADSI.

NOTE: Following programming examples is for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This sample code assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. This sample code is provided for the purpose of illustration only and is not intended to be used in a production environment.

Option Explicit
Dim conn
Dim com
Dim iAdRootDSE
Dim strNC
Dim strQry
Dim RS
Dim strstmsrv
Dim svsSmtpserver
Dim crServerName
set conn = createobject("ADODB.Connection")
set com = createobject("ADODB.Command")
Set iAdRootDSE = GetObject("LDAP://RootDSE")
strNC = iAdRootDSE.Get("configurationNamingContext")
conn.Provider = "ADsDSOObject"
conn.Open "ADs Provider"
com.ActiveConnection = Conn
com.ActiveConnection = Conn
Wscript.echo "SMTP Virtual Servers"
'Get SMTP server query using protocolCfgSMTPServer object class
strQry = "<LDAP://" & strNC & ">;(objectCategory=protocolCfgSMTPServer);name,distinguishedName;subtree"
com.ActiveConnection = conn
com.CommandText = strQry
Set RS = com.Execute
While Not RS.EOF
    strstmsrv = "LDAP://" & rs.fields("distinguishedName")
    set svsSmtpserver = getobject(strstmsrv)
    crServerName = mid(svsSmtpserver.distinguishedName,instr(svsSmtpserver.distinguishedName,"CN=Protocols,")+16,instr(svsSmtpserver.distinguishedName,",CN=Servers")-(instr(svsSmtpserver.distinguishedName,"CN=Protocols,")+16))
    wscript.echo "ServerName:" & crServerName
Set RS=Nothing
Set com=Nothing
Set conn=Nothing


Here is another good example of where protocolCfgSMTPServer object class is used to find SMTP Virtual Server and set Message Restriction on an SMTP Virtual Server Using ADSI in VB @ Setting Message Restriction on an SMTP Virtual Server Using ADSI.

Hope this helps.

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