WordPress SMTP Without Plugin

// Configures WordPress to use SMTP server
    define( 'SMTP_USER',   'example@yoursite.com.com' );    // Username to use for SMTP authentication
    define( 'SMTP_PASS',   'SMTP_PASSWORD' );       // Password to use for SMTP authentication
    define( 'SMTP_HOST',   'smtp.smtpserver.com' );    // The hostname of the mail server
    define( 'SMTP_FROM',   'example@yoursite.com' ); // SMTP From email address
    define( 'SMTP_NAME',   'FROM_NAME' );    // SMTP From name
    define( 'SMTP_PORT',   '25' );                  // SMTP port number - likely to be 25, 465 or 587
    define( 'SMTP_SECURE', 'tls' );                 // Encryption system to use - ssl or tls
    define( 'SMTP_AUTH',    true );                 // Use SMTP authentication (true|false)