• cPanel

SMTP AUTH is required for message submission on port 587

By Prasad Naik

January 17, 2018

The ‘SMTP AUTH’ error usually happens when users try to send mails without properly authenticating their mail account in email clients such as Outlook or Thunderbird. What causes the error ‘SMTP AUTH is required for message submission on port 587’ in cPanel/WHM servers With the latest cPanel/WHM update, email accounts that were working fine till […]