554 Transaction failed Reject due to policy restrictions

Reason

Your e-mails have been rejected by our mail system because the information provided in the e-mail header does not comply with our policy.

The email header contains too many DKIM signatures.

Solution

An e-mail may be signed more than once by DKIM, e.g. in the case of forwarding, and thus contain more than one DKIM signature.

However, if an email contains too many DKIM signatures, it will no longer be accepted by our system.

• Therefore, please make sure that the number of DKIM signatures is reduced

As soon as the email in question contains a number of DKIM signatures that does not exceed our threshold, the email will be accepted by our system.