https://first2host.co.uk/blog/install-postfix-email-server-on-ubuntu/ No Further a Mystery
cf file. Instead of editing this file immediately, You should use Postfix’s postconf command to query or established configuration options.Postfix SPF will show you how to incorporate SPF checking towards your current Postfix set up. This enables your server to reject mail from unauthorized resources.然后，导航到您向其发送邮件的电