Inbound SMTP overview
ecosio supports inbound email over Simple Mail Transfer Protocol (SMTP) for automatic document validation and processing.
Inbound email options
You can either have suppliers send documents directly to your ecosio email address, or forward emails to ecosio.
Using your ecosio email address
Emails are sent directly to your ecosio inbound email address. Your ecosio Integration Engineer will provide the exact recipient address for your environment.
Forwarding to ecosio
You can forward emails containing electronic documents to ecosio, but you must either forward them as a new message or use the Sender Rewriting Scheme (SRS) on your email server.
When you forward an email as a new message, the forwarded email is sent from your domain rather than the original senderās domain. This is the safest option to help ecosioās Sender Policy Framework (SPF) and DomainKeys Identified Mail (DKIM) checks pass.
SRS rewrites the sender address during forwarding, which makes SPF more likely to pass. Without SRS, forwarding can cause the email to fail SPF because your mail server is not authorised to send on behalf of the original senderās domain.
Security and authentication checks
ecosio performs the following checks before processing the emailās attachments. If you need more detailed information about these checks for your setup, contact your ecosio Integration Engineer.
ecosio scans emails for spam and malware. If a risk is detected, ecosio rejects the email.
DKIM checks whether an authorised system sent the email from the senderās domain and whether the content stayed unchanged in transit. If DKIM fails, ecosio rejects the email.
SPF helps prevent spoofing by checking whether the sending mail server is authorised to send email for the senderās domain. If SPF fails, ecosio rejects the email.
Supported attachments
ecosio processes documents that are attached to the email. The following attachment types are supported:
- PDF invoices, including ZUGFeRD
- Structured XML formats, such as CII and UBL
Images, spreadsheets, and nested .eml attachments are ignored.
To avoid rejections, make sure the document is attached as a file. ecosio can reject inline attachments contained in the email body rather than as an attachment.
Multiple attachments
If an email contains multiple attachments, ecosio processes each attachment as a separate message. ecosio always splits attachments, and you can't disable splitting.
Because each attachment becomes its own message, each one is processed and billed separately. After processing, you can't merge the split messages. To avoid unexpected splitting and billing, ask suppliers to send one document per email.
Updated 4 months ago