[ad_1]
Always forms fails in WP. Why ?? It is because hosting / server ?
Even when we configure external smtp like gmail sometimes the plugin deactivate itself. Same with Zoho mail plugin. Sometimes it deactivate itself.
It never works flawlessly.
Any advanced tips ?

You have given zero relevant information. My advanced tip would be learn to use your words to better communicate issues.
Install an STMP plugin. Use [download fluent SMTP from WP org here](https://wordpress.org/plugins/fluent-smtp/)
You can send emails from your site for free using [brevo](https://www.brevo.com/) or [sendgrid.com](https://sendgrid.com/en-us). Just get a free account.
Or you can use STMP for your email.
Try to avoid sending emails from php/ WP itself. This isn’t the best way.
This will fix your form issue