Tutorial configuring x-lite softphone is not right.
 

The part:

Send outbound via: Select the proxy radio button and enter:
Address: eu.voxalot.com

is not working for me. I received then: Registration error: 401 - Unauthorized on my x-lite softphone.

What is the difference in sending this part to Voxalot to notice that difference.

Solved
 

An answer from martin in an other topic was:

Try setting the "Authentication User-ID" to xxxxxx@voxalot.com

And that did the trick. :)

I was wrong again.
 

Following an other topic I found out that X-Lite was still partially blocked by the firewall of my ATA.
After making a rule for it everything works likes the tutorial says.

Maybe there is a sticky topic needed about firewall and witch IP's and ports Voxalot used.