diff --git a/roles/docker/templates/restic/failure.sh.j2 b/roles/docker/templates/restic/failure.sh.j2
index 2a63d47..6a11cde 100644
--- a/roles/docker/templates/restic/failure.sh.j2
+++ b/roles/docker/templates/restic/failure.sh.j2
@@ -1,9 +1,12 @@
 #!/bin/sh
-curl --silent smtp://{{ smtp_host }} --mail-from {{ services.restic.mail_from }} --mail-rcpt admin@data.coop --mail-rcpt datacoop-backup@reynir.dk --upload-file . << END_OF_MAIL
+curl --silent smtp://{{ smtp_host }} --mail-from {{ services.restic.mail_from }} \
+	--mail-rcpt admin@data.coop --mail-rcpt datacoop-backup@reynir.dk \
+	--upload-file .; cat << END_OF_MAIL
 From: Restic backup <{{ services.restic.mail_from }}>
 To: admin@data.coop
 Subject: Restic backup failed
-Date: $(date)
+Date: $(date -R)
+Message-ID: $(date +%s.%N)@{{ services.restic.domain }}
 
 Dear sir or madam,