How to set up SMTP email on your MU Online server website
Complete guide to configuring SMTP email on your MU Online server website: what SMTP is and why it's needed (password recovery, account activation, admin notifications), how to choose a sending email address (from your domain vs a free service), what SMTP settings you need from your provider (host, port, security type, credentials), step-by-step configuration for the most common MU server web systems, how to use Gmail and Outlook as free SMTP relays (with the modern app password method), how to test if emails are actually being delivered, why emails go to spam and how to fix it (SPF, DKIM, DMARC records), and common SMTP errors with solutions.
