Email that seems to be missing is almost always still in your mailbox, just somewhere else in Newton. Work through these in order.
Try these, in order
Check Low Priority. Tidy Inbox moves Gmail Promotions and Social, and Outlook's Other (Focused Inbox) mail, out of your Inbox into Low Priority. It's on by default for accounts added since September 10, 2026. Open Low Priority in the sidebar on desktop or in the menu on your phone. To bring a sender back, use Move to Inbox: right-click the email on desktop, or use the ••• menu in the email on your phone. To turn Tidy Inbox off for an account, go to Settings › Supercharge › Tidy Inbox.
Check your filters. Gmail filters and Outlook rules can archive or label mail before it reaches your Inbox, even while Newton is closed. On desktop, go to Settings › Accounts, pick the account, then Automation › Manage Filters. Filters you made in Gmail or Outlook count too.
Give the first sync time. After you add an account, and after every app update, Newton downloads your most recent mail first. For older mail, click Load older emails at the bottom of the list on desktop, or keep scrolling down on your phone.
Look under the account. Labels, folders, and Gmail's Promotions and Social appear under each account, not in the combined Inbox. If your Inbox says Hidden from Unified Inbox, that account is left out: turn on Show in Unified Inbox in its settings.
Check Snooze. Snoozed email stays out of your Inbox until its time. Open Snooze to see it.
Check for a second Newton account. If the same mailbox is also linked to another Newton account, it can stop syncing in one of them. Check which Newton account you're signed in to at the top of Settings, and contact us if you think a mailbox is linked to two.
Update Newton. Recent versions fixed missing mail in some Outlook and Microsoft 365 folders.
Good to know
Tidy Inbox never deletes mail and changes nothing in Gmail. In Outlook, it saves your choice for that sender, so Outlook on the web matches.
Filters work for Gmail and Outlook accounts, not IMAP.
Snoozing only hides an email in Newton. Gmail and Outlook on the web still show it in the Inbox.