Hello, The warning messages don't mean the hash file was not created or will not work, it will work as intended, but if you do not want to see those warnings, you can just add a comment to each line as a second parameter. The second parameter can be anything as it is not used in postfix, but it will silence the postmap warnings. Please see below how to silence the warning.In virtual_alias_domains = hash:/etc/postfix/virtual_domainsadd the example values linuxsecrets.com #linuxsecrets mainlinuxsecrets.net #linuxsecrets storelinuxsecrets.org #linuxsecrets free softwareAfter completed run::postmap /etc/postfix/virtual_domains
Now reload postfix
systemctl reload postfix
That should have resolved the warnings. Test it by running:
tail -f /var/log/mail.log
That's it