We're the only Outlook inbox provider that puts real money behind infrastructure claims. Here's exactly how it works, what's covered, and how to claim it.
50%
Refund on subscription fees charged if deliverability doesn't perform after following the system
$5
Per domain one-time add-on price for the guarantee itself
Wk 3
The guarantee is valid only during week 3, immediately after the 2-week warmup
The Deliverability Guarantee is an optional one-time $5/domain add-on available on orders of 6 or more domains across any NorthHorizonMails plan — Normal, Premium, Mixed, or Custom.
When you add it, you're purchasing three things:
The guarantee covers the inbox infrastructure we provide — the Microsoft tenants, DNS configuration, IP reputation, and sending setup. It does not cover your email copy, your list quality, or external reputation factors outside our control.
The refund is 50% of the subscription fees we charged — not setup fees and not the guarantee add-on fee itself. If you're on a 10-domain plan at $65/domain every 4 weeks, the subscription fees charged are $650. A 50% refund means $325 back. The $5/domain guarantee fee itself is a one-time add-on and is not refunded.
To qualify for a refund, all five of the following conditions must be met. Each one is non-negotiable. We set these conditions because skipping any one of them is the most common reason deliverability fails — and when it happens, it's not our infrastructure that's at fault.
Your domains must be purchased through NorthHorizonMails or verified by us before setup begins. Domains you bring from third-party registrars may carry prior reputation history we can't control or audit. Our verified domains start clean, with no prior sending history, no previous spam associations, and proper WHOIS configuration. The guarantee does not apply to external domains.
Standard warmup is 1 week. The guarantee extends this to 2 full weeks (14 days). During warmup, your inboxes must follow our recommended daily sending limits — typically starting at 5-10 emails per inbox on day 1 and gradually increasing. Do not skip days. Do not accelerate the schedule. We'll provide the exact warmup settings when you add the guarantee.
After the 2-week warmup, you launch in week 3 — not earlier. Launching before warmup is complete is the single biggest cause of deliverability failure. Even 1-2 days early can meaningfully damage sender reputation. The guarantee requires that you honor this timeline.
Normal license: 4-5 emails per inbox per day. Premium: 8-10 per inbox per day. These are maximums, not targets. Pushing beyond them — especially in the early weeks of a new domain — degrades IP reputation faster than any other single factor. The guarantee requires you to respect these limits from week 3 onward.
Subject lines and body copy containing phrases like "Act Now", "Limited Time Offer", "100% Free", "You've Been Selected", excessive capitalization, or other well-known spam triggers will cause deliverability failure regardless of infrastructure quality. Your copy must be clean, personalized, and compliant with CAN-SPAM/GDPR standards. If your copy is flagged by spam filters, that is not an infrastructure problem.
We define deliverability failure as: more than 40% of your sent emails landing in spam or promotions folders, as measured during week 3, the 7-day period immediately after your 2-week warmup launch, using standard inbox placement testing tools (e.g. GlockApps, Mail-Tester, or equivalent).
To make a claim, you'll need to provide:
We review all claims within 5 business days. If your claim is approved, the refund is processed within 7 business days.
Honest note: In practice, when operators follow all five conditions, deliverability failure is rare. The guarantee exists because we trust our infrastructure — not because we expect to pay out regularly. If you're following the system, you'll land in primary.
Use GlockApps, Mail-Tester, or any equivalent tool to get a measurement of where your emails are landing. Take screenshots showing the test date, your domain, and the placement results.
Email Contact Email with subject line: "Guarantee Claim — [your domain name]". Claims must be submitted during week 3, after all criteria are met. Claims submitted after week 3 are not eligible.
We'll ask for: inbox placement test results, warmup schedule confirmation, sample copy from the campaign, and your account/domain details. Incomplete submissions will be returned for more information, but the initial request still must be made during week 3.
We'll review your claim within 5 business days and confirm our decision. Approved claims receive a 50% refund on the subscription fees we charged within 7 additional business days, issued back to your original payment method.
Every other inbox provider disclaims responsibility for deliverability the moment you sign up. We don't. Here's why we're confident enough to put money behind our infrastructure:
When we control every variable in the infrastructure stack, we can stand behind it. That's why the guarantee exists — and why the 5 conditions matter. The only things outside our control are your copy and your warmup discipline. That's what the conditions protect against.
Add the Deliverability Guarantee to any plan for a one-time $5/domain on orders of 6 or more domains. The only inbox provider that bets on its own infrastructure.
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