SMTP error

SMTP error

Hello,

I followed the below settings to setup smtp in my vbulletin forum. But i am getting error as configuration settings are wrong

Outgoing Server Settings: 

Outgoing Server Name: smtp.zoho.com
Port: 465, SSL or
Port: 587, TLS
Require Authentication: Yes

can someone help me here

Do i need to setup SPF and domain keys for my domain ?

Thanks