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SPF Demystified: The Complete Guide to SPF Records
December 12, 2024 Reading time: 43 minutes
Whether you host your own mail server or you outsource your email needs, if your domain sends even a small amount of email, you need a robust, accurate SPF record. Your SPF record helps protect your domain's reputation by making it more difficult for spammers, phishers, and other evildoers to spoof email from your domain. When you publish an SPF record, you let other mail servers know exactly which hosts are allowed to send mail for your domain, and which are not. Large email services may even refuse mail from domains with a missing or invalid SPF record, tightening their stranglehold on email. And, unfortunately, even a small error in your SPF record can make it invalid, resulting in bounced or lost outgoing mail for your domain. It's important that you get your SPF record right.
This guide provides a detailed explanation and several examples to help you understand SPF: what it does, how it works, and how to build a suitable SPF record. If you just need a quick solution, though, our SPF Record Wizard can walk you through the process, check for common mistakes, and suggest an SPF record for your domain, suitable for copy-pasting into a DNS TXT record.
Read morePostfix Demystified: Incoming Mail Restrictions
September 24, 2024 Reading time: 40 minutes
There was a time in the early days of the internet when spam, phishing, CEO impersonation, email trojans, and other forms of email abuse were not a thing. Mail servers would happily accept mail from any domain and forward it along to any other domain with no worry of being an unwitting accomplice in evildoing. Alas, those blissful days are long gone and, today, a mail server’s incoming mail policy is a critical early line of defense against these threats.
In this article, you will learn how to configure Postfix to enforce a simple mail acceptance policy for your domain(s). Your policy is determined by the role(s) your server will play (relay, destination, send-only, etc.), where your users typically connect from, and your tolerance for spam and misbehaving mail clients, among other considerations.
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📬 SPF Record WizardThe spell trickles away to nothing. The merchant smiles. "Do you think you are the first magician to try to use lawless, thieving magic on a humble merchant?" He throws you into the street and bars the door.