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iOS, iPadOS, and macOS all let you specify whether any given app should show no notifications, temporary banners, or persistent alerts: look in Settings > Notifications and System Settings > Notifications. Temporary banners appear briefly and then automatically disappear, which is appropriate for notifications requiring no acknowledgment. But what if you see a temporary banner only as it’s disappearing and can’t read it in time? You can find a historical list of notifications in Notification Center.

We recently wrote an article for those who manage their own Internet domain names about using SPF, DKIM, and DMARC to prevent your domains from being used in phishing attacks and enhance the deliverability of legitimate email. But what about other domains you own but don’t use for email? To make phishing attacks more believable, spammers sometimes forge email so it appears to come from parked domains that aren’t protected. You can use SPF, DKIM, and DMARC to ensure that forged email that seems to come from your unused domains isn’t accepted.

When you connect to a public Wi-Fi network at an airport, hotel, coffee shop, or school, you may need to interact with a captive portal login page to be granted access to the network. It might require you to enter login credentials, ask for your name, or make you agree to terms of service. But what if that login page doesn’t appear, or something kicks you off the network and you can’t reconnect?