SMTP Connection to Wordpresss failing

I am trying to connect response forms from my Wordpress website, using the Pirate Forms plugin, however the SMTP is not working. I have tried using Postman STMP, an assistance plugin for STMP, but it showed no service at the smtp.zoho.com:25, which may or may not be the problem. There may be ways to fix this in the control panel, but i don't know them. Any advice would be appreciated, and clarification questions are welcome.