env('EMAIL_CURRENCY', 'GHS'), 'default_quota_mb' => (int) env('EMAIL_DEFAULT_QUOTA_MB', 1024), // new mailboxes start on the free 1 GB tier // Storage tiers: quota (MB) → monthly price (minor units). 1 GB is free. 'quota_tiers' => [ ['mb' => 1024, 'price_minor' => 0], // 1 GB — Free forever ['mb' => 5120, 'price_minor' => 1000], // 5 GB — GHS 10 ['mb' => 10240, 'price_minor' => 2000], // 10 GB — GHS 20 ['mb' => 25600, 'price_minor' => 3000], // 25 GB — GHS 30 ['mb' => 51200, 'price_minor' => 6000], // 50 GB — GHS 60 ], ];