Email Security Services for Mid-Market Companies
Email is how attackers actually get in - spoofed domains, phishing, and business email compromise that reroutes a payment. We harden the Microsoft 365 or Google Workspace you already run: DMARC enforcement, anti-phishing, and BEC controls, configured on your own tenant, not sold to you as a product.
Schedule a 30-minute callOr call us directly: +1 (332) 241-6493
Why HIFENCE?
Your email is hardened by senior engineers certified in offensive security - people who know how an attacker phishes, spoofs, and hides in a mailbox, not just what a policy toggle is called.
Who needs email security services
Email security solutions become urgent for a concrete reason: a fraudulent invoice almost got paid, a customer received a convincing email that was not from you, an account was clearly taken over, or a cyber insurer now asks whether you enforce DMARC. For mid-market companies in New York and across the US, email is the single most exploited entry point - and business email compromise is the most expensive thing that comes through it.
If that is where you are, these are probably your real questions:
- Can someone spoof our domain and email our customers or staff as us right now?
- If finance gets an urgent request to change a supplier’s bank details, what stops it?
- Would we even notice a hidden forwarding rule quietly copying a mailbox to an attacker?
- We pay for Microsoft 365 security - is any of it actually turned on and tuned?
How we harden your Microsoft 365 email security
The same email security solutions apply to Google Workspace - the platform differs, the controls do not: authenticate your domain, tune anti-phishing, lock down the mailbox, and watch for abuse, working hand in hand with the user-facing phishing protection your people see.
1. Email security assessment (about 1 week)
We review how mail actually flows through your tenant: authentication records (SPF, DKIM, DMARC), anti-spam and anti-phishing policies, external sender handling, connectors, admin roles, and existing mailbox rules. You get a findings report that says what is exposed, how an attacker would use it, and what to fix first.
2. Authentication and anti-spoofing (SPF, DKIM, DMARC)
We publish and align SPF and DKIM for every sending source you actually use, then move DMARC from monitoring to enforcement without breaking legitimate mail - newsletters, invoicing tools, and third-party senders included. This is what stops attackers from spoofing your own domain at your customers and staff.
3. Anti-phishing and BEC controls
We tune impersonation and anti-phishing policies, tag external mail, and put guardrails around the moment fraud actually happens: changed bank details, urgent wire requests, gift-card asks. We audit every mailbox for the hidden forwarding and delete rules attackers plant to stay invisible.
4. Monitoring, documentation, and handover
We set up alerting for suspicious sign-ins and rule changes, document the configuration so your IT team can run it, and brief the people who handle money on exactly what a BEC attempt looks like. Where you have no internal owner, we can keep watch through an ongoing engagement.
Typical time to a hardened tenant for a 50-300 employee company: a few weeks.
DMARC to full enforcement runs a little longer to stay safe. The first step is a 30-minute call.
What you get from email threat protection
- Email security findings report - authentication gaps, weak anti-phishing policies, risky connectors, and every mailbox rule that should not be there, rated by how an attacker would use it.
- SPF, DKIM, and DMARC at enforcement - aligned for all your real senders and moved to a reject policy, so no one can spoof your domain and legitimate mail still lands.
- Hardened anti-phishing and anti-spoofing configuration - impersonation protection, external tagging, and quarantine tuned to your tenant, not left on defaults.
- BEC and payment-fraud controls - process guardrails and detections around wire changes and urgent-payment requests, plus a clean sweep of malicious inbox rules.
- Documentation and a team briefing - the configuration written down so IT can maintain it, and finance and reception briefed on what an attack actually looks like.
Never had an outside look at how exposed your systems are? A cybersecurity audit is a clean starting point, and identity issues found there feed straight into email hardening.
Business email compromise protection: stopping payment fraud before it clears
BEC is the attack that does the most damage to companies your size, precisely because it does not look like an attack. There is no malware and no broken firewall - just an email, from a real or spoofed address, asking to change bank details or push through an urgent wire. A spam filter has nothing to catch. Protection has to be built from layers that each close part of the door.
Make your domain impossible to spoof
SPF, DKIM, and DMARC at enforcement mean an attacker cannot send mail that appears to come from your domain - the most common opening move in a BEC attempt, aimed at your customers as often as your own staff.
Catch impersonation and lookalikes
Tuned anti-phishing policies flag display-name impersonation and lookalike domains, and external mail is tagged so a message pretending to be an internal executive is obvious to the person reading it.
Find the attacker already inside
When a mailbox is compromised, attackers plant hidden forwarding and auto-delete rules to stay invisible. We audit every mailbox for them, and alert on new rules and suspicious sign-ins so the next one is caught early.
Put a rule around the money
The final control is process: any change to payment details or any urgent wire is verified out of band, on a known number, before it moves. We set the rule and brief the people it protects.
This is not theory. We removed attackers from a client’s mail systems and stopped a fraud in progress in four hours - the full account is in the BEC case study. If an attack is live right now, our incident response team is where to start.
Already hit? BEC & account-takeover response
Everything above is preventive - hardening a tenant before an attack. This is different: if a business email compromise or a Microsoft 365 / Google Workspace account takeover is happening right now, the priority is to stop it and understand it. HIFENCE investigates the compromise, contains it - revoking active sessions, forcing password and MFA resets, and killing the malicious inbox rules and hidden forwarders the attacker planted - then traces what they actually saw and did, and hardens the tenant so it does not recur.
This is reactive incident work, distinct from the preventive hardening above. It is part of our incident response practice - investigation, containment, and coordination on your own tenant.
The email security solutions we don’t sell - and what we are not
“Email security” on the market usually means a product with a monthly bill. We work differently: we harden what you already own.
So you know exactly what you are buying, we are just as clear about what you do not get:
It is not a product we resell.
We do not sell you a mail filter, a license, or a subscription and mark it up. We harden the platform you already pay for - Microsoft 365 or Google Workspace - and configure the security features most companies never turned on. Vendor-neutral, on your own tenant.
It is not a bolt-on spam filter.
A gateway in front of your mail catches bulk spam; it does not fix a domain anyone can spoof, an admin account with no MFA, or a forwarding rule an attacker left behind. BEC succeeds precisely because it looks like normal, clean email - so the controls have to live inside the tenant, not just in front of it.
It is not a replacement for training your people.
Configuration closes most of the door; the last gap is human. We brief the people who move money, and for a standing program we point you to security awareness training and phishing protection - the two work together, they do not replace each other.
Frequently asked questions
What are email security services, and what do they actually cover?
What is business email compromise, and how do you protect against it?
We already use Microsoft 365 with Defender. Do we still need this?
Will moving DMARC to enforcement block our legitimate email?
How long does an email security hardening project take?
Do you take over our email, or sell us a security product?
Prefer to send a written question?
Send a few details and we reply within 24h.
The next step: find out how exposed your email really is
30 minutes on your setup: whether your domain can be spoofed today, what Microsoft 365 or Google Workspace security you are paying for and not using, and where a business email compromise attempt would get through. You leave with a clear picture and a fixed quote.