E-signature verification failed error. Letter sent via Letter sent using Kaspersky Secure Mail Gateway
Latest update: January 18, 2019
ID: 12486
Letters with digital signatures, processed by Kaspersky Secure Mail Gateway, may not pass the check of the addressee.
Error causes
Signature error is caused by the title X-KLMS-AntiVirus-Status found in the MIME part of the message.
Solution
Turn off adding titles to all parts of the message using the allowXHeadersForParts = 0 parameter and confirm adding general titles:
# /opt/kaspersky/klms/bin/klms-control --get-settings 3 | grep X
<addXHeaders>1</addXHeaders>
<allowXHeadersForParts>0</allowXHeadersForParts>
