If you've been using Gmail to manage multiple email accounts, including third-party addresses, you'll soon have to find an alternative. According to Google's support document, "Send as" will be discontinued in January 2027 for Gmail's web and mobile app interfaces. You'll still be able to add third-party accounts on mobile, meaning you can check your email on iOS or Android, but not send messages from those aliases. (Third-party accounts won't sync at all on the web.) For those in the Apple ecosystem, Apple Mail supports any email address and has solid privacy features.