Hi I try to use zoho in laravel using SwiftMailer library, it working fine when in local.

but in Digital Ocean server it doesn't work, and got this following error:

Connection could not be established with host smtp.zoho.com [Connection timed out #110] {"userId":7,"email":"*****@gmail.com","exception":"[object] (Swift_TransportException(code: 0): Connection could not be established with host smtp.zoho.com [Connection timed out #110] at vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/StreamBuffer.php:269)

I already try to looking for: 

https://help.zoho.com/portal/zohocorp/community/topic/connection-could-not-be-established-with-host-smtp-zoho-com

but seems dont understand how to fix this.

please help me to solved this problem.
thanks.