DKIM configuration tool for Office 365 custom domains
Built for Office 365 Home subscribers with custom domains who need email authentication to avoid spam folders..
“However, there is no option to enable the DKIM security measure in the premium interface for your own personalized email addresses / own email domain. Without D…”
The receipts — real demand
“However, there is no option to enable the DKIM security measure in the premium interface for your own personalized email addresses / own email domain. Without DKIM, outgoing email often ends up in the recipient's Spam folder, because the mail is not signed and authenticity can not be verified.”
Full dossier
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Every corroborating quote, the source receipts, and the community echo. One email, no payment.
Why this is a gap
Surfaced from a high-intensity complaint with clear willingness to pay and a specific, reachable audience.
The market
Office 365 Home users with custom domains who hit the DKIM gap in the standard UI. No search volume data, but the pain is concrete: legitimate mail getting marked spam without DKIM.
Competition & the opening
Microsoft's own premium tier (Microsoft 365 Business) supports DKIM natively; third-party tools like dmarcian and Valimail handle DKIM, but not for Office 365 Home specifically. The gap is a guided, low-cost DKIM enabler for the Home tier.
What's hard to build
Feasibility 4/10 signals real blockers: you must interact with Microsoft Graph API for domain verification, handle CNAME/TXT record validation in user DNS, and navigate Microsoft's restrictive policies around Home tier feature access. Enterprise-grade DNS and email reputation handling is non-trivial.
Why now
Microsoft left DKIM configuration out of Office 365 Home tier despite rising spam/phishing; gap is deliberate product segmentation.
How you'd monetize
$4.99/mo add-on for Office 365 Home users