DNS and E-Mail server

My e-mail server has been working for about a week.  I rebooted the server and received the "At least one service failed during system startup" message.  The event viewer shows the following errors.

Eventid 5781
Dynamic registration or deregistration of one or more DNS records failed because no DNS servers are available.

Eventid 7000
Timeout (30000 milliseconds) waiting for the Merak Mail Server SMTP service to connect.

Eventid 7000
The Merak Mail Server SMTP service failed to start due to the following error:
The service did not respond to the start or control request in a timely fashion.  

I can restart all of the services and they do start but then when I try to send or receive e-mails io get
"550 5.7.1 Unable to relay for administrator@familychristianacademy.com".

Like I said this was working and I did not change anything in the DNS or the mail server.  Any suggestions?  I need to get this fixed fast as possible!
Who is Participating?
Have you verified that the NIC is functioning properly? I'd start there.
MarkWPAuthor Commented:
Turns out to be the Microoft SMTP service started back up when I rebooted the server and was conflicting with the Meric SMTP service. Thanks for the help.
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