Exchange 2013 Message Header

Hi All

We have just had added an Exchange 2013 server to our 2010 Exchange environment.
Exchange 2010 consists of 2 servers set-up using DAGS.
The Exchange 2013 server is standalone (not part of DAG set-up)

While looking at an email header for a different reason I found what seems to me to be unusual delivery occurrence where the New 2013 server receives the email but appears to me to send it to itself, any thoughts as to what is going on here.

1 * mail.FromExternal.com 111.111.111.111 smtp.ourserver.com OurServer.com xx/x/xxxx 10:42:33 PM
2 1 Second smtp.ourserver.com 222.222.222.222 exchangeCASServer1 333.333.333.333 Microsoft SMTP Server xx/x/xxxx 10:42:34 PM
3 0 seconds exchangeCASServer1 333.333.333.333 NewExchange2013Server 444.444.444.444 Microsoft SMTP Server (TLS) xx/x/xxxx 10:42:34 PM
4 0 seconds NewExchange2013Server 444.444.444.444 NewExchange2013Server 444.444.444.444 Microsoft SMTP Server (TLS) xx/x/xxxx 10:42:34 PM
5 1 Second NewExchange2013Server 444.444.444.444 NewExchange2013Server 444.444.444.444 Microsoft SMTP Server (TLS) xx/x/xxxx 10:42:35 PM



Cheers D