Domain controls
Confirm SPF, DKIM, and DMARC are present for active domains, including domains that do not send email.
Account controls
Require multifactor authentication, remove unused mailboxes, and review administrator access regularly.
Process controls
Document who can approve payment changes, customer notifications, and new sending tools.
Practical context
How to use this guidance
A checklist is valuable when it drives ownership. Each item should have a named owner, a review date, and a clear definition of done.
A practical example
Imagine a team reviewing email security checklist after a new software vendor starts sending customer-facing mail. The immediate question is not whether the setup uses the right acronym; it is whether the business can explain the sender, prove that it is authorized, and spot problems before customers or employees lose trust.
That review usually starts with domain controls. From there, the team should compare the intended workflow with real message samples, provider settings, and any reporting data that shows how receivers are treating the mail. This turns the topic from an abstract security idea into a manageable operating task.
Action checklist
- Inventory domains, subdomains, and senders.
- Confirm SPF, DKIM, and DMARC status for each domain.
- Protect accounts with multifactor authentication.
- Document incident response and vendor onboarding steps.
Common traps
- Checking boxes once and never revisiting them.
- Tracking only technical records without business owners.
- Leaving parked domains out of scope.
Questions to ask internally
- What evidence proves this item is complete?
- When will it be reviewed again?
- Who owns exceptions and temporary workarounds?
Evidence to gather
Good decisions are easier when the team works from evidence instead of memory. For this topic, collect enough detail to connect technical records with the business process they support.
- A recent sample message from each important sending path.
- The DNS records or provider settings connected to the sender.
- The business owner who can confirm whether the sender is still needed.
- Any recent support tickets, delivery problems, or suspicious-message reports.
- The decision log for changes made after the review.
Review rhythm
Review this area whenever a new email platform is launched, a domain or subdomain is added, a vendor is retired, or a suspicious message is reported. For stable environments, a quarterly review is usually enough to catch drift before it becomes an urgent delivery or impersonation problem.
Keep the review lightweight. The useful output is a short list of confirmed senders, open questions, owner names, and next actions. If that list is understandable to IT, finance, marketing, and leadership, the email security program is much easier to maintain.
What good looks like
A useful checklist becomes a repeatable operating rhythm rather than a one-time project artifact.
Where Lappu AI fits
Teams that want help turning these ideas into a working DMARC, DKIM, and SPF plan can review the email security work at Lappu AI.