Install and activate the WP Mail SMTP plugin.
Go to Settings -> WP Mail SMTP.
Under Settings tab:
Update the following fields under Mail section:
From Email: wecare@serbisyo.com
From Name: Serbisyo.com
Mailer: Other SMTP
Update the following fields under Other SMTP section:
SMTP Host: smtp.zoho.com
Encryption: SSL
SMTP Port: 465
Auto TLS: ON
Authentication: ON
SMTP Username: wecare@serbisyo.com
SMTP Password: ask sir Kim for password
Click Save Settings to save your changes.
Under Email Test tab:
Update the Send To and HTML fields if necessary.
Click Send Email to check if the SMTP settings is working properly.
Note: Email entered in Send To field should receive an email. If it doesn't received an email, double check all the settings above.
ERROR: Could not authenticate your SMTP account
How to FIX:
Disable Two Factor Authentication