Topic starter
21/10/2026 2:46 pm
TL;DR: Black Friday email can still land in spam when SPF, DKIM, and DMARC are not enforced, Valimail says. Holiday sending needs a complete sender inventory and a blocking policy before volume spikes.
Editorial analysis by NHI Mgmt Group, based on content published by Valimail: “How to get your Black Friday email marketing program ready”.
Key questions
Q: Why do unauthenticated email domains increase phishing and fraud risk?
A: Without SPF, DKIM, and DMARC, attackers can forge sender addresses and deliver convincing messages that appear to come from trusted people or brands.
Q: What do marketing teams get wrong about email authentication?
A: They often treat SPF, DKIM, and DMARC as a technical checkbox owned by IT, then add new sending tools without updating the authorised sender inventory.
Q: What breaks when DMARC is not enforced for brand email?
A: Without DMARC enforcement, mailbox providers can still deliver or partially trust spoofed mail that appears to come from your domain.
Practitioner guidance
- Inventory every holiday sender List every platform, agency, app, and temporary tool that will send email on your domain before campaigns go live.
- Ask for DMARC enforcement status Confirm whether the domain policy is monitoring only, quarantine, or reject, and do not accept a record that reports but blocks nothing.
- Map delegated sending authority Require approval for any service that sends as the brand and keep that approval tied to an owner, a business purpose, and a retirement date.
Bottom line: Email authentication is the first trust gate mailbox providers apply, so weak SPF, DKIM, or DMARC alignment can send legitimate Black Friday mail into spam or enable brand impersonation.
Glossary terms: DMARC, Email Authentication, Delegated Sending Authority, Brand impersonation fraud
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This topic was modified 4 days ago by NHI Mgmt Group
23/10/2026 12:48 am
DMARC enforcement is a sender identity governance issue, not a marketing preference. Mailbox providers now act as identity decision points, so a domain that cannot prove authorised sending is functionally indistinguishable from a spoofable brand. That shifts the control from campaign optimisation into governance over delegated sending authority. Practitioners should treat authenticated email as part of identity policy, not a separate deliverability checklist.
A question worth separating out:
Q: Who is accountable for domain authentication during peak campaigns?
A: Accountability should be shared, but ownership must be explicit. Security or IT usually controls DNS and policy, while marketing controls the inventory of platforms that send on the brand’s behalf. If either side works alone, enforcement stalls or legitimate mail breaks.
👉 Read our full editorial: Why DMARC enforcement is now a Black Friday deliverability control
This post was modified 4 days ago by NHI Mgmt Group