Are brand-new domains treated equally?

Short answer: no. A brand-new domain gets zero benefit of the doubt. Spam filters run on pattern recognition, and a domain with no sending history looks identical to a domain someone just registered to run a phishing campaign. You have to earn your way out of that default suspicion.

Here's what that suspicion looks like in practice. Filters apply conservative placement defaults, so early emails are more likely to land in spam even when your content is perfectly fine. Any complaint you receive in the first few weeks carries disproportionate weight because there's so little data to balance it against. Volume spikes trigger warnings fast. And if your authentication setup has even a small problem, you'll feel it harder than an established sender would.

The good news is that the path forward is straightforward. It just takes patience.

Days 1-30: lay the foundation

Get SPF, DKIM, and DMARC in place before you send a single email. This isn't optional. Filters use authentication as a baseline signal, and missing records look suspicious on a new domain. Start sending only to your most engaged contacts, the people who signed up recently and are expecting to hear from you. Keep your daily volume very low, think tens of emails rather than thousands, and increase gradually. Double opt-in is your best friend here because it proves every address on your list genuinely wants your mail.

Days 31-60: build the pattern

Consistency matters more than volume right now. Filters are watching whether your sending behavior follows a recognizable, trustworthy pattern. Keep increasing volume slowly, and watch your sender reputation signals closely. Bounce rates and complaint rates should be close to zero. If they're not, pause and investigate before continuing the warmup. One bad week at this stage can set you back significantly.

Days 61-90: open up carefully

By now you should have enough sending history for filters to treat you more like an established sender. You can start broadening your list and increasing frequency, but still gradually. Avoid anything that looks like a sudden spike. Keep authentication clean, keep content genuine, and keep an eye on placement rates. Tools like Google Postmaster Tools will show you how Gmail specifically is reading your domain reputation during this phase.

Now the honest summary: new domains aren't penalized unfairly. They're just unknown. Spam filters don't trust what they can't verify, and your job in the first 90 days is to give them enough clean evidence to start trusting you. Rushing that process is the most common mistake new senders make (and it's the one that takes the longest to recover from).

If your new domain is already having trouble getting into the inbox, our SOS hotline is free and we'll take a look at what's actually going on.