sending emails with gmail as email client

sending emails with gmail as email client

Im using zoho mails for our emails with this domain.

incwebsolutions.com

but Im sending emails from my gmail with adding SMTP ,POP of zoho mail to gmail.it is working fine.but when send email from that email will send to spam box in gmail.but if we send email from zoho mail interface it will send correctly with out spamming.

is there any setting to solve this?