What’s the difference between domain vs IP recovery strategies?

Say your open rates have collapsed and your emails are landing in spam. You check your sender reputation and something looks bad. Now the question is: what exactly is broken? Is it your IP, your domain, or both? The answer changes everything about how you recover.

Your IP address is the numeric address your mail server sends from. Your sending domain is the brand identity in your From address (think updates@lighthouse-media.com). Mailbox providers track reputation signals on both, separately. And they recover differently too.

IP reputation recovery

IP reputation is more flexible. If your IP's reputation is damaged, you have two real options. You can rehabilitate it by sending only to your most engaged subscribers for a few weeks, letting positive engagement signals (opens, clicks, no complaints) slowly rebuild the reputation score. Or, depending on your setup, you can move to a fresh IP and warm it up properly before ramping volume.

Fresh IPs aren't a magic fix though. An IP with no history is a blank slate, not a good one. Mailbox providers are suspicious of unknown IPs sending at volume. You'll still need a proper warmup, which takes weeks. And if the domain sending from that IP is still in bad shape, a new IP will only help so much.

Domain reputation recovery

This is the harder problem. Your domain's reputation follows your brand everywhere, regardless of which IP you send from. You can't just spin up a new domain either (well, you can, but you'd be starting from zero with no established sending history, and that's its own headache).

To recover a damaged domain, you need to fix what caused the damage in the first place. That usually means cleaning your list, pulling back volume, and sending only to subscribers who've engaged recently. Over time, consistent positive engagement signals rebuild trust. Authentication also matters here because SPF, DKIM, and DMARC all tie to your domain, not your IP. If your authentication setup is broken or missing, fixing that first is non-negotiable.

So one thing to know: subdomains can sometimes be affected by the root domain's reputation. And the reverse is true too. If you've been sending all your traffic (marketing, transactional, automated) through one domain with no separation, a mess in one stream can drag the whole domain down.

Which do you tackle first?

Focus on the domain. It's the harder, slower problem, and no amount of IP shuffling will fix it. Once your domain reputation is recovering, then sort out the IP situation. If you've already been moved to a new IP by your ESP, great. Just warm it up properly and send clean.

If you're not sure which layer is actually causing your delivery issues, our free Email Header Analyzer can help you read what mailbox providers are actually seeing. Or if this is a live emergency, come find us at our SOS hotline and we'll look at it with you.