Website issue: The remote name could not be resolved:

I am seeing an error: The remote name could not be resolved:  when I try to download some HTML file from a specific web address. I also see this error when trying to send an email, even though it still seems like it sends the email. Anyone know what could cause this issue? It started just randomly yesterday.  Not sure if it is with my hosting site or what?
7/13/2014 8:01:20 AM----> System.Net.Mail.SmtpException: Failure sending mail. ---> System.Net.WebException: The remote name could not be resolved: (my email Host)
7/13/2014 2:12:14 AM----> System.Net.WebException: The remote name could not be resolved: (my website I am trying to download via the code below)
Dim fr As System.Net.HttpWebRequest : Dim targetURI As New Uri(webaddress) fr = DirectCast(System.Net.HttpWebRequest.Create(targetURI), System.Net.HttpWebRequest) Also, everything seems to be fine when I run the code l ...