---
title: "Validate e-invoices in Connect to Mail"
slug: "draft"
updated: 2026-08-10T14:13:26Z
published: 2026-08-10T14:13:26Z
canonical: "knowledgecenter.docuware.com/draft"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://knowledgecenter.docuware.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Validate e-invoices in Connect to Mail

DocuWare is introducing e-invoice validation – a new, free feature in Connect to Mail that automatically checks incoming e-invoices against the applicable format standards and business rules. The validation process checks e-invoices in the background without delaying archiving or requiring manual action.

Components: General Email, Document Processing

Here is how

In the General Email configuration for Connect to Mail, enable automatic document processing and select **Automatically validate all e-invoices for compliance** on the Import Options tab.

![](https://cdn.document360.io/0108e24e-b3e8-446c-b670-66b1d2a9e861/Images/Documentation/image-R5MRVHDU.png)

When an email with an e-invoice attachment (XML or hybrid PDF) arrives in a mailbox connected via Connect to Mail, DocuWare automatically validates the invoice. It checks the invoice on two levels:

- **Format & Structure (XSD):** Checks whether the invoice file is correctly structured, ensuring all required components are present and in the right place.
- **Business Rules & Logic (Schematron):** Checks whether the invoice content is correct; for example, that mandatory information is filled in and that the numbers and values are consistent with each other.

The validation result can be Valid, Valid with Warnings, or Invalid. It is stored with the e-invoice in three ways:

- A downloadable validation report, accessible via the "Show e-invoice validation report" button in DocuWare Viewer
- A color-coded annotation directly on the document (optional), and
- As index fields, making results searchable and filterable in DocuWare (optional).

The feature supports the main e-invoice formats used in Germany and across Europe, including XRechnung, Peppol BIS 3.0 and ZUGPFeRD / Factur-X, all based on the European e-invoicing standard EN 16931. Files that do not match a supported standard are archived without a validation result.

> [!NOTE]
> **Important: Validation does not replace compliance check**
> 
> A positive validation result does not constitute a legal guarantee of invoice compliance. The compliance of your invoicing process remains your organization's responsibility.

For more details, see [Validating e-invoices in Connect to Mail](https://knowledgecenter.docuware.com/docs/validating-e-invoices).

**Supported versions**: DocuWare Cloud + 7.14 + 7.13