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 mailenable a document library.

From an external email account, you attempt to send an email message to the document library and you receive a nondelivery 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.