Fix Mail App Not Opening When Sending Signed Documents on iPhone
Question details
The user is unable to open the default iOS Mail app to share or send a signed document from their PDF filler app.
- Product
- Adobe Fill & Sign / iOS Mail App
- Device & OS
- iPhone 5c, iOS 9.2.1
- Scenario
- Attempting to send a signed document through an Exchange account connected via OWA.
- Observed behavior
- The Mail app does not launch or process the request when the user tries to send the signed document.
Ensure that your iPhone is connected to a stable internet connection, the iOS Mail app is properly configured, and you are sharing a supported file format such as PDF, PNG, or JPG.
Verify File Type Compatibility and Export Format
Ensure the document being shared is recognized as a supported file type by the iOS Mail app to prevent the sharing sheet from crashing or failing to load.
The iOS Mail app requires attachments to be in universally recognized formats. If the signing application uses a proprietary format before finalizing, the Mail app will not open.
Open the document in your signing application and check the export or save settings to verify it is being saved as a standard PDF, PNG, or JPG.
Ensure all signature fields are completely flattened or finalized so the file behaves as a static document.
Tap the Share icon again and select the Mail app to see if the draft window now opens properly.
Check Exchange Account and Mail App Configuration
A misconfigured or disconnected Exchange account in the native Mail app can block the creation of new outbound messages via third-party apps.
Update iOS and the Signing Application
Older versions of iOS (like iOS 9.2.1) and outdated applications may have known bugs related to app-to-app communication and sharing features.
Sign and Share PDFs Seamlessly with WPS Office
Bypass email app integration errors by using WPS Office. Our integrated PDF tools allow you to easily sign documents and share them directly via your preferred email client without compatibility issues.
- 1. Open your PDF: Launch the WPS Office app and open the PDF document you need to sign.
- 2. Sign the document: Navigate to the PDF Edit tab and use the built-in Signature tool to sign your document.
- 3. Share via Email: Tap the Share icon and select Email to instantly attach your signed PDF to a new message.
Frequently Asked Questions
Why does my iPhone Mail app fail to open when sharing a signed PDF?
This typically occurs if the PDF application is trying to hand off an unsupported file type, if there's a sync issue with your connected Exchange account, or if the PDF app itself contains a bug that requires a software update.
How do I ensure my signed document is in a supported format for iOS Mail?
Most default mail applications support standard formats like PDF, PNG, and JPG. Ensure your signing app is explicitly exporting or saving the final document as a standard PDF before you attempt to share it.
Can an outdated iOS version prevent email sharing?
Yes, older versions of iOS may harbor compatibility bugs with modern email security protocols and Exchange configurations. Updating your iOS and the specific signing application to their latest versions often resolves these sharing failures.
