How can you improve inbox placement long-term?

If you've ever watched your open rates quietly slide downward over a few months, you already know that inbox placement isn't a problem you solve once and forget. It's more like a relationship with the mailbox providers. You build trust slowly, and you can lose it faster than you'd expect.

The good news is the path forward is pretty clear. The hard part is that most of it is slow, consistent work rather than a single fix you flip on.

Start with authentication (week one)

Before anything else, make sure your authentication foundation is solid. SPF, DKIM, and DMARC need to be in place and aligned. This isn't what gets you into the inbox on its own, but missing or broken authentication is a fast way to get filtered out. Think of it as the floor, not the ceiling. If you're not sure where you stand, our free SPF Checker and DKIM Record Lookup take about 30 seconds each.

Clean your list before you send more (week one to two)

List hygiene is the thing most senders skip because it feels like shrinking your audience. It's actually the opposite. Sending to bad addresses (people who have disengaged, addresses that hard bounce, or addresses that have gone dormant) actively damages your reputation with every campaign. Remove hard bounces immediately. Suppress anyone who hasn't opened in 6 to 12 months. If your list feels stale, we clean them (hi ;)).

Stabilize your sending patterns (weeks two to four)

Mailbox providers track your sending volume over time, and dramatic swings look suspicious. If you normally send 10,000 emails a week and suddenly blast 150,000, expect filtering. Pick a send frequency and stick close to it. If you need to scale up, do it gradually over a few weeks. The consistency of your sending patterns is a bigger deal than most senders realize.

Improve engagement (month one onward)

This is the long game, and it's also the most impactful. Mailbox providers like Gmail and Outlook watch how recipients actually interact with your email. Opens, clicks, replies, moves to inbox, deletes without opening. These signals shape where your next campaign lands. Sending content people genuinely want to read is not a soft, marketing-speak idea. It's a deliverability strategy. (Of course, that's easier said than done.)

Segmenting by engagement level helps a lot here. Your most active readers should hear from you more often. Your least active ones should hear from you less, or not at all until you've run a proper re-engagement campaign.

Monitor and catch problems early (ongoing)

Reputation problems are much easier to fix when you catch them early. Watch your bounce rates, complaint rates, and open rates by segment. If your complaint rate climbs above 0.1% on any campaign, that's a signal to investigate before it becomes a pattern. Setting up feedback loops with the major providers gives you complaint data directly, so you're not guessing.

So the realistic timeline for seeing meaningful improvement is usually 4 to 8 weeks of consistent effort. There's no shortcut that sticks. But the senders who treat inbox placement as an ongoing practice rather than a one-time project are the ones who rarely have emergencies.

If something is actively broken right now and you need a faster answer, our SOS Hotline is free and we actually pick up.