postfix on Debian Trixie: asserting you're not a spammer

I've been writing a series of articles about configuring postfix and dovecot to provide email services on a Debian Trixie VPS. This latest article is about how to configure SPF, DKIM and DMARC so your mail server won't be tagged as a spammer. You can find it at postfix: Asserting You’re Not a Spammer - Imperfect Computing Enjoy! And thanx again to the community here for helping me get started on this configuration.