How to Automatically Forward Email Receipts (Gmail, Outlook, Apple Mail)

You probably get dozens of email receipts every week. Amazon orders, subscription renewals, SaaS tools, online groceries, Uber rides, domain registrations. Every one of them is a legitimate business expense sitting in your inbox, mixed in with newsletters and meeting invites and promotional noise.

Most people handle this one of two ways: they ignore the receipts entirely and scramble at tax time, or they manually forward each one as it arrives — which works great for about three days before life gets in the way. There is a better option. Every major email provider lets you create rules that automatically forward specific emails to another address. Set it up once, and every receipt routes itself to your tracking system without you lifting a finger.

The whole setup takes about five minutes. Here is how to do it in Gmail, Outlook, and Apple Mail.

Why auto-forward instead of doing it manually

The problem with manual forwarding is simple: you forget. Not today, not this week — but eventually. You get busy, you are on your phone, you tell yourself you will forward it later. Later never comes. By the time tax season rolls around, you have months of uncaptured receipts buried across threads and folders.

Auto-forwarding removes you from the equation entirely. When a receipt hits your inbox, it gets forwarded to your tracking system in the same second. No decision required, no discipline needed. It works while you sleep, while you are on vacation, while you are ignoring your inbox on a Friday afternoon. Set it and forget it — that is the entire point.

Gmail: using filters to auto-forward

Gmail's filter system is powerful and handles this perfectly. Here is the step-by-step:

1. Add your forwarding address. Go to Settings (gear icon) > See all settings > Forwarding and POP/IMAP. Click "Add a forwarding address" and enter your SendToBooks inbox address. Gmail will send a verification email — click the link to confirm.
2. Create a filter. Go back to Settings > Filters and Blocked Addresses > Create a new filter.
3. Set your filter conditions. In the "Subject" field, enter: receipt OR "order confirmation" OR invoice OR "payment confirmation". Gmail supports OR operators directly in filter fields, so you can cast a wide net in a single filter.
4. Choose the action. Click "Create filter" and check the box for "Forward it to" — then select your SendToBooks address from the dropdown.
5. Apply to existing emails (optional). Check "Also apply filter to matching conversations" if you want to forward receipts you have already received.

Tip: Start with your top five merchants. If you shop on Amazon frequently, create a separate filter for from:auto-confirm@amazon.com — this catches every order confirmation without relying on subject line matching. Do the same for other high-volume senders like Shopify stores, your web hosting provider, or subscription services.

You can always add more filters over time. The beauty of this approach is that each new filter takes about 30 seconds to create, and once it exists, it works forever.

Outlook (Microsoft 365): rules

Outlook uses "rules" instead of filters, but the concept is identical. Here is how to set it up:

1. Open Rules. Go to Settings (gear icon) > Mail > Rules. Click "Add new rule."
2. Name your rule. Something like "Forward receipts" works fine.
3. Set conditions. Under "Add a condition," choose "Subject includes" and enter receipt. Click "Add another condition" and add entries for order confirmation, invoice, and payment confirmation. Set the condition logic to "Any" so the rule triggers if any one of these terms appears.
4. Set the action. Under "Add an action," choose "Forward to" and enter your SendToBooks inbox address.
5. Save. Click Save, and the rule starts running immediately.

One important advantage of Outlook.com and Microsoft 365: rules run server-side. This means they execute even when your computer is off, your Outlook app is closed, or you are away from your desk. The forwarding happens on Microsoft's servers the moment the email arrives — no desktop app required.

You can also create rules based on sender addresses. If you want to forward everything from specific merchants, add a "From" condition instead of (or in addition to) the subject line match.

Apple Mail: rules on Mac

Apple Mail supports rules as well, though with one significant caveat. Here is the setup:

1. Open Rules. In the Mail app, go to Mail > Settings (or Preferences on older macOS versions) > Rules. Click "Add Rule."
2. Set conditions. Set the dropdown to "any" (so the rule fires if any condition matches). Add conditions for "Subject contains" with values like receipt, order confirmation, invoice, and payment confirmation.
3. Set the action. Choose "Forward Message" from the action dropdown and enter your SendToBooks inbox address.
4. Save and apply. Click OK. Mail will ask if you want to apply the rule to existing messages in your inbox — choose Apply if you want to catch past receipts.

The caveat: Apple Mail rules only run when the Mail app is open on your Mac. If your laptop is closed or the app is not running, incoming emails will not be forwarded until you open Mail again. The rules will then process any emails that arrived while Mail was closed, but there can be a delay.

For always-on forwarding, the better approach is to set up rules at the email provider level. If you use iCloud Mail, go to icloud.com > Mail > Settings > Rules and create the same filters there. iCloud Mail rules run server-side, just like Outlook, so they work 24/7 regardless of whether your Mac is on.

Pro tips for better filters

A few practical things people learn after using auto-forwarding for a while:

• Start broad, then refine. A filter matching "receipt OR order OR invoice OR payment confirmation" will catch most things. You might occasionally forward a non-receipt email, but that is not a problem — SendToBooks only processes actual receipts. Random emails that do not contain receipt data simply get ignored.
• Add sender-specific filters for high-volume merchants. If you shop on Amazon a lot, create a dedicated filter for from:auto-confirm@amazon.com. Same for recurring vendors like your cloud hosting provider, phone carrier, or business insurance company.
• Do not worry about duplicates. If the same receipt gets caught by two different filters, it only gets processed once. Better to have overlapping filters than gaps.
• Review your filters once a quarter. As your business evolves, you will start using new vendors and services. A quick five-minute review every few months ensures your filters stay current.
• Combine with manual forwarding for edge cases. Auto-forwarding handles the predictable stuff. For one-off purchases from new vendors or unusual receipts, just forward them manually. The two approaches complement each other perfectly.

What happens after the email is forwarded

Once an email receipt lands in your SendToBooks inbox, the rest is automatic. The system reads the email, extracts the key details — merchant name, amount, date, payment method, and expense category — and adds the receipt to your dashboard. No scanning, no manual tagging, no data entry.

Every receipt shows up in one place, organized and searchable. You can review expenses by date, category, or merchant. When tax time comes around, everything is already there — no digging through your inbox, no searching for confirmation emails, no reconciling bank statements against half-remembered purchases.

The combination of auto-forwarding and automatic extraction means the entire receipt-tracking process happens without any ongoing effort from you. The initial five-minute setup is the only work involved.