Why do i get an error 63 when i sent a mail use SMTP Email

[nichts]

I used "SMTP Email Send Message.vi" but i have allways the error 63. How can I reslove this error? Ist  this a port error? a pop up displayes and  shows that i should to change the option under the tool palette-> Server.Vi but Ido not know what i can do?

[altenbach]

What SMTP server are you trying to use? Your own? Obviously, it is refusing your connection attempt. The SMTP VIs exclusively use the classic SMTP port (25), but many newer mail servers require different authentication, port, encryption, etc. for security reasons.

Start with this search.