Make sender address configurable

defaults/main.yml

@@ -36,3 +36,4 @@ borgbackup_keep_weekly: 8
 borgbackup_keep_monthly: 6
 borgbackup_keep_yearly: 0
 borgbackup_use_msmtp: true
+borgbackup_email_from: "notifications@oh14.de"

templates/borgbackup-panic-email.sh

 #!/bin/bash
 
 msmtp root << EOF
-From: $1 on $(hostname) <notifications@oh14.de>
+From: $1 on $(hostname) <{{ borgbackup_email_from }}>
 Subject: $1 failed on host $(hostname)
 
 Oh no :(