Networking - Telnet SMTP port 25

Hi,

I am using telnet smtp.netvigator.com 25, but I got 530. 5.7.0 authentication required. How to fix it.

Thanks,
David

look like the SMTP port is using an authenctiocation method, try Telnet on port 587 this is the SMTP ssl port.

or if you want to use port 25 removed the authentication required from the configuration on exchange