I think this is the old issue where /var/qmail/bin/qmail-queue is “ln” to queue-dk. You might want to undo the “ln” and create a new one to qmail-queue.orig ….
Carl From: Jeff Koch [mailto:jeffk...@intersessions.com] Sent: Tuesday, October 22, 2019 08:50 AM To: email@example.com; Eric Broch <ebr...@whitehorsetc.com> Subject: [qmailtoaster] Error on new mailserver setup Hi: Anyone know why we would be seeing this message when trying to send email on a new QMT7 setup? 554 qmail-dk: Cannot sign message due to invalid message syntax. (#5.3.0) Thanks, Jeff