Using Outlook for Android for personal email and calendar management
Hi! You cannot designate a safe sender directly in the Outlook Android app, Safe Sender functionality is only available via Outlook desktop or web versions; the Android app does not support managing Safe Sender lists via IMAP accounts.
Because of this limitation, image-based content from that sender remains blocked on mobile, despite being marked safe on desktop. Outlook for Android, when connected via IMAP, doesn’t apply desktop/web junk-mail or safe-sender rules, nor does it auto-load images, even from trusted senders, unless images are manually allowed per message.