Short answer: Position spam filtering as an add-on or as the top tier of your email plans; pitch the problem the customer lives with (fake invoices, phishing, full mailboxes) rather than the technology; start with a free trial; and do the MX change for them. With a per-domain cost that doesn't depend on mailbox count, you can sell mailbox-based packages and control your margin.
1. Position the service
- As an add-on: "Spam and virus protection" on top of existing hosting or email plans.
- As a plan tier: included in a higher tier such as "Business Email Pro".
- Standalone: also sellable to companies whose mail lives elsewhere (Microsoft 365, Google Workspace), because MX-based filtering works wherever the mailbox is.
2. Design your pricing
If your cost is per domain and independent of mailbox count, mailbox-based tiers are both easy to understand and profitable. An example structure:
| Your package | For whom |
|---|---|
| Essential | Small businesses, 1–10 mailboxes |
| Business | Companies with 10–50 mailboxes |
| Larger businesses | 50+ mailboxes, several domains |
Offering yearly billing improves both your cash flow and retention. With the Spambil reseller program your cost is per domain per year and decreases as you add domains; details are shared after you apply.
3. Pitch the problem, not the technology
Customers buy solutions to problems they recognize, not "SPF, DNSBL and Bayes":
- "Stops the 'our bank details have changed' invoice scams that target your finance team."
- "Catches infected .zip files and macro Office attachments before anyone opens them."
- "Suspicious mail goes to quarantine; anything caught by mistake is released in one click."
- "You don't have to do anything; we set it up in a few minutes."
4. Start with a free trial
A few days of free protection is the strongest sales tool for a customer who has a spam problem: real phishing emails caught in quarantine convince better than any presentation. Show them the quarantine statistics at the end of the trial.
5. Do the setup for them
- Add the customer's domain and mail server in your reseller panel (or automatically through the API).
- Replace the MX records with the two records shown in your reseller panel (priority 10 and 20) and delete the old ones.
- For Microsoft 365 or Google Workspace customers, apply the recommended settings from the setup guide.
- Run the MX test in the panel and let the customer know protection is on.
Run a hosting company, MSP or IT service? Apply for the Spambil reseller program; applications are usually reviewed within 1–2 business days.
Frequently asked questions
Can I sell it to customers who use Microsoft 365?
Yes. Filtering works through the MX record, so it doesn't depend on where the mailbox is hosted; Microsoft 365 and Google Workspace settings are covered in the setup guide.
Who manages the quarantine?
You do, for all customer domains, from your reseller panel: release a message a customer asks about, trust or block a sender.
Which customers should I start with?
Customers who have complained about spam or phishing, with busy finance or sales teams and more than 10 mailboxes, usually convert fastest.