Bought SMTP host can't connect

[Avoid]

I bought a webdomain from BioHost.info I wanted to use the smtp to send emails, but when I try to do a test it says:

Unable to connect to mail server(s). Please specify a valid mail server, server properties, or check your network connection. The following exception was also recorded: System.Exception: Unable to to connect to ns1.watchundergrads.com at port 25. Exception has been thrown by the target of an invocation. ---> System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 93.174.93.164:25
at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
at System.Net.Sockets.Socket.Connect(EndPoint remoteEP)
at AdvancedIntellect.Ssl.SslSocket.Connect(IPEndPoint remoteEP)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at aspNetEmailInternal.ᐸ.Connect(IPEndPoint remoteEP)
at aspNetEmailInternal.ᐸ.Connect(String server, Int32 port)
at aspNetEmail.EmailMessage.ᐸ(String )
at aspNetEmail.EmailMessage.ᐹ(String )
--- End of inner exception stack trace ---
at aspNetEmail.EmailMessage.ᐹ(String )
at aspNetEmail.EmailMessage.ᐷ()

I tried countless times with port 25, 576, 465, 443, and others but all the same. Tried with SSL on/off

Then I tried to remote control my friend's computer (other country) I tried with same program same configurations and the connection was ok!

I opened my router and opened port 25 and rebooted twice, still gives me same error

My provider's smtp works just great "smtp.mail.dk" what can this be? It also happened with my friend which is from the US!

[Prometheus_Fire]

How exactly are you attempting to connect to the server?

C:\>telnet ns1.watchundergrads.com 25
220-ns1.watchundergrads.com ESMTP Exim 4.69 #1 Sat, 04 Jul 2009 20:49:03 -0400
220-We do not authorize the use of this system to transport unsolicited,
220 and/or bulk e-mail.
helo
250 ns1.watchundergrads.com Hello
quit
221 ns1.watchundergrads.com closing connection


Connection to host lost.

C:\>

As you can see it is responding on port 25. Is the problem still ocurring?

[Jason09]

Did you open the port to your computer's IP address?

[BoT]

pronspam..o.O?