I've got an Ubuntu 14.04 server running Postfix - which is sending mail via an external host (Mandrill).
I've got no issues sending email - but (prior to disabling TLS - which seems to have caused no issue) - on each email sent I'd get the error -
postfix/postfix-script: warning: /var/spool/postfix/etc/ssl/certs/ca-certificates.crt and /etc/ssl/certs/ca-certificates.crt differ
Since disabling TLS I no longer get the warning when sending an email (not supprising) - however it's seen on starting the service (and on scheduled cron service checks).
The server hosts multiple domains - but only sends emails from one.
The obvious solution it seems would be to copy over the certificate files to the Postfix directory (would love a reminded on which files other than the .crt I need to move!)?
Or is this a warning I don't really need to worry about?
Any help much appreciated.