Email security
Make sure no one can send email as your company.
See who is really sending as your domain, and close the gaps that let attackers impersonate you. DMARC done properly. Start with your domain.
8.3B
phishing emails detected in a single quarter
Microsoft, Q1 2026
4.5×
more clicks on AI-written phishing than human-written
Microsoft DDR 2025
10.7M
business email compromise attacks in a single quarter
Microsoft, Q1 2026
Three reasons your domain can't wait.
Impersonation
Without enforcement, attackers send invoices, password resets and payment requests as you, to your customers and your own staff. DMARC at p=reject is what stops them.
Deliverability
Gmail, Yahoo and Microsoft now check DMARC. Get it wrong and your legitimate email is throttled or junked, so replies, receipts and sales quietly stop arriving.
Compliance
Mailbox providers, cyber-insurance and enterprise procurement increasingly demand enforcement. Most domains are exposed and do not know it.
How it works
How to lock down your domain.
01
Publish one record
Add a single DMARC DNS record. That is the whole setup. No agent, no code, no mail routing changes.
02
See every sender
Within a day you see every service sending as your domain, who owns it, and exactly why it fails authentication.
03
Reach p=reject safely
Fix the real senders, verify each fix, and switch on full enforcement knowing your legitimate email keeps flowing.
Inside SenderLedger
See every sender and what needs fixing.
SenderLedger shows the provider, volume, DMARC pass rate and approval status for each source sending as you, so your team can prioritise exactly what is blocking enforcement. Failing and unapproved senders surface first.
- Identify
- Approve
- Fix
- Enforce
You work through every unknown and failing sender, approving the legitimate ones and fixing the rest, until all your genuine mail is authenticated and the domain is ready for p=reject.
Questions about DMARC?
All questions →Enforcement
Safe rollout
Why SenderLedger?
Next enforcement decision
Find out who is sending as your domain.
Add one DNS record and see every sender within a day. Free for your first domain.