Convert invoices by email: how the channel works
Official references
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Related Technical Wiki
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The email channel converts genuine PDF invoice attachments and returns validated artifacts in the same thread. It is an account-enabled Enterprise channel for controlled, low-volume workflows.
Setup and first conversion
- Ask the Invoice Converter team to enable the email channel.
- In the account profile, add and verify every sender address. Choose the reply destination and language.
- Copy an inbox from the profile. The generic inbox needs exactly one subject tag such as [XRechnung], [ZUGFeRD], [EN16931], [UBL], or [CII].
- Attach genuine PDFs and send the message. Each accepted PDF uses one conversion unit.
- Open the threaded reply and review the issued file plus its HTML validation report.
Important limits
Only verified senders are processed. The channel accepts genuine PDF attachments, not renamed images. Low-confidence cases and warnings still need human review. Available units must cover the full message before processing begins.
Email or API?
Use email when a person or mailbox rule benefits from a reply thread. Use the External API when a system needs idempotency, task status, rate-limit information, and explicit downloads.
Ready to convert your invoices?
Start converting PDF invoices to XRechnung, ZUGFeRD, and other formats today with credits or a paid plan.