Your network contains a server named Server1 that has Microsoft SharePoint Foundation 2010
installed. You install the SMTP Server feature on Server1. You configure the incoming email settings
from Central Administration. You mail-enable a document library. From an external email account,
you attempt to send an email message to the document library and you receive a non-delivery
report (NDR). You need to ensure that you can send email messages to the document library. What
should you do?

A.
Create a Mailbox (MB) record in DNS.

B.
Create a Mail Exchanger (MX) record in DNS.

C.
Configure the outgoing email settings in Central Administration.

D.
Configure the connection control settings of the SMTP virtual server.