GMAIL

bisa ke url : https://support.google.com/mail/contact/bulk_send_new?rd=1

YAHOO

bisa ke url : https://senders.yahooinc.com/contact

Hotmail, Live.com, Outlook.com

bisa ke url : https://support.microsoft.com/en-us/getsupport?oaspworkflow=start_1.0.0.0&wfname=capsub&productkey=edfsmsbl3&locale=en-us&ccsid=635714983457075069&forceorigin=esmc