By default, Scanner relies on the Apple’s Mail app to send scans via email. If scans can’t be sent from Scanner, this is most likely because the Mail app is not installed, properly configured, or your email is simply stuck in the Outbox.

You can either try troubleshooting steps to fix the Apple's Mail-related issues or use other email services apps such as Spark, Gmail, Outlook, etc. to email scans.

1. Make sure the Mail app is installed. If it’s not, download it from the App Store.
2. Open iOS Settings, scroll down, and tap the Mail button > Accounts.
3. Check if the needed account is added here. If it’s not, tap Add Account and follow the onscreen instructions.
4. Tap the account and make sure the Mail toggle is enabled. Now, your account is properly configured.

Once done, try sending scans again. If it doesn’t work, there might be a problem on the Mail app side or issues with your email provider. To check it, open the Mail app on your device and try sending a test email with a .pdf attachment (for example to yourself), then check if you received it.

Other reasons might be:

• Poor internet connection. Emails can get stuck in the Outbox because of it. Please try connecting to another WiFi network and resend the scans.
• The scans you try to send are too large for your email server (You can see the size of your scans in the description at the top of the Share menu). Typically, email servers might refuse attachments bigger than 10-15 MB. The solution might be sending them as an archive, or sharing from cloud storage via a link.

1. Ensure your email service’s app is installed on your device and the needed email account is added there.
2. In Scanner, open the scan you want to share (if you’d like to share several scans, use the select option at the top right of the “My Scans” section or the needed folder).
3. Tap Shareand select the icon of your email service app instead of the blue Email icon. 

If you still can’t send scans via email, there might be the following reasons:

• Internet connection on your device is not stable. Try connecting to another WiFi network.
• The scans you try to send are too large for your email server (You can see the size of your scans in the description at the top of the Share menu). Typically, email servers might refuse attachments bigger than 10-15 MB. The solution might be sending them as an archive, or sharing from cloud storage via a link.
• There are issues with your email provider. You can check if you can send emails from the email service you use (for example, the app or the webpage of your email provider) and if not, contact their support team to figure it out.