We just registered a new domain and our email is landing in spam or getting flagged as suspicious. How do we fix that?

This is one of the most common surprises after a rebrand or a new business launch, and it is not a sign that anything is broken. To the world's mail systems, your new domain is a complete stranger. It has no track record, no history of people opening and replying to its messages, and nothing that says the mail is legitimate. Spammers register fresh domains by the thousand, so brand new plus unauthenticated is exactly the profile filters are built to be cautious about.

Start with authentication, because that is the part you control completely. Three DNS records do the work: SPF lists which mail servers are allowed to send for your domain, DKIM adds a cryptographic signature proving a message really came from you and was not altered, and DMARC tells receiving systems what to do if the first two fail and sends you reports. These are not optional anymore. Google and Yahoo now require authentication from senders, and while the strictest rules apply to high-volume senders, even a small business needs SPF and DKIM in place for reliable delivery. Non-compliant mail does not always land in spam; it increasingly gets rejected outright.

The step most businesses miss: your email platform is not the only thing sending as you. Invoicing and accounting software, your CRM, appointment reminders, a contact form on your website, and any marketing platform may all send messages that appear to come from your domain. Every one of those needs to be included in your SPF record and, where supported, signed with DKIM. A perfectly configured Microsoft 365 tenant still produces spam-foldered invoices if the accounting system was never authorized to send on your behalf.

Then give the domain a chance to build a reputation. Real, ordinary email is what does it: conversations with customers and vendors, messages that get opened and replied to, sent at a steady pace. What hurts a new domain is the opposite pattern, like sending an announcement to two thousand contacts in week one. If you have a list to email, ramp up over several weeks rather than starting at full volume. Most new domains settle into normal delivery within a couple of weeks of correct setup and consistent sending.

Two extra things worth checking. First, find out whether your domain was registered and used by someone else before you got it, because an expired domain can arrive carrying a bad reputation from a previous owner, which changes the fix. Second, make sure a real website is live at the domain; a domain with mail flowing but nothing on the web looks less legitimate to filtering systems.

If your mail is already being flagged, this is diagnosable in minutes. A technician can read your published records, look at the actual rejection messages, confirm whether the domain has prior history, and get the authentication right in an afternoon. Doing it before the next big send is far easier than repairing a reputation afterward.