Emails decrypted by MailSealer may be rejected by Exchange Server SE with the error message ‘Multiple From addresses are not allowed without a Sender address’.
This problem occurs if the E-Mail has not been encrypted correctly and can be circumvented by a workaround on the appliance as long as the cause has not been resolved by the sender.
The following adjustments are necessary in MailSealer:
Please note that with this adjustment, the receiving E-Mail Client will not be able to display any information about the signature.