If your emails keep landing in spam, someone will offer to fix it. Some sell software, some clean your list, some are your email platform's own support team, and some will do the whole job for you. We explain what each kind of email deliverability service actually does, roughly what it costs, what to ask before you pay, and what you can check yourself this afternoon.
An email deliverability service helps your emails reach the inbox instead of the spam folder. It sets up authentication (SPF, DKIM and DMARC), watches your sender reputation, cleans your list, tests where your emails land and fixes content problems. Options range from cheap software and list-cleaning tools to done-for-you consultants who find the cause and fix it.
Who this is for: Coaches, consultants and founders whose emails are going to spam, or who want to check before they do.
An email deliverability service works on one question: when you press send, does your email reach the inbox, the promotions tab or the spam folder? A good one looks at every step of that journey and fixes whatever is broken.
The work usually covers seven things:
Most services fall into four groups. The main difference is how much of the work they do for you, and that is also what drives the price. The costs below are rough guides for comparing, since real quotes depend on your list size and how much is broken.
| Type | What you get | Typical cost | Best for |
|---|---|---|---|
| Deliverability software | Dashboards for placement tests, blacklist checks, DMARC reports and alerts. You do the fixing. | Usually a monthly subscription, from tens of dollars to a few hundred, depending on volume | Teams with someone technical who can act on the data |
| List-cleaning services | Bulk checks that flag invalid, risky and disposable addresses before you send. | Usually priced per address, often a fraction of a cent each at higher volumes | Old or imported lists, or a sudden rise in bounces |
| ESP support | Help from your email platform, such as Kit, Mailchimp or ActiveCampaign, with setup, limits and account warnings. | Included in most plans, with deeper help sometimes kept for higher tiers | Setup questions and problems specific to that platform |
| Done-for-you consultant | An audit of your setup, list and content, then the fixes made for you, with ongoing monitoring if you want it. | One-off audits often start in the hundreds, and ongoing retainers cost more | Business owners who rely on email for sales and want the cause found and fixed |
Tools tell you something is wrong. A consultant tells you why, then fixes it. If bounces are your only problem, a cleaning service may be all you need, and our guide to hard bounces and soft bounces helps you read those numbers.
The clearest sign is when people tell you. A client saying they found your email in spam is worth more than any dashboard. There are quieter signs too:
It is also worth checking yourself against the Google and Yahoo bulk sender rules. Since 2024, anyone sending large volumes to Gmail or Yahoo addresses needs proper authentication, a one-click unsubscribe and a spam complaint rate under 0.3%. Miss these and your emails can be filtered or rejected outright. Our breakdown of the Gmail and Yahoo sender requirements walks through each rule and how to meet it.
Deliverability is a small field, and anyone can call themselves an expert. Four questions quickly sort the careful people from the rest.
Then watch for red flags. Anyone who guarantees 100% inbox placement is promising something nobody can deliver, because Gmail, Outlook and Yahoo decide where each email lands. Be careful, too, with offers to sell you a list, rotate through fresh domains to dodge filters, or get you off a blacklist without fixing the cause. Those shortcuts usually make things worse a few weeks later.
You can do a lot yourself before paying anyone. Start with these five steps:
Plenty of problems clear up after these steps. If yours does not, our guide on how to stop emails going to spam goes deeper.
Done-for-you makes sense when email brings in real money, when you have tried the basics and things are still wrong, or when you would rather spend those hours on clients. That is the work we do at Unbury. We audit your setup, fix authentication and list problems, rework how your emails are built and keep watching your reputation afterwards. If that sounds useful, have a look at our email deliverability service.
It depends on the type. Software and list cleaning are usually the cheapest, billed monthly or per address. A done-for-you consultant costs more because they do the work, often as a one-off audit and fix or an ongoing retainer. Ask for a clear scope in writing before you agree to anything.
An email service provider, such as Kit or Mailchimp, is the platform you send from. A deliverability service focuses on whether those emails actually reach the inbox. Your provider handles the sending, and a deliverability specialist looks at your domain, list and content to change where your emails land.
No honest one will. Gmail, Outlook and Yahoo make the final call on every email, and their filters keep changing. A good consultant removes the problems that send you to spam and shows you the before and after numbers.
Authentication fixes usually take effect within a day or two, once your DNS changes spread. Repairing a damaged sender reputation is slower, usually a few weeks of steady sending to people who want your emails. The worse the damage, the longer it takes.
Send us your setup and we will tell you honestly where it is leaking customers and what to fix first. Free, no pitch.