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Protect Email Against Phishing, Spam and Malware - DuoCircle







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- EMAIL DELIVERABILITY
- Outbound SMTP
- DMARC Reporting
- SPF Management
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- SpamSentinel for Domino
- EMAIL ROUTING
- Tenant Migration
- Email Forwarding
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# We Stop Malicious Emails
... before they harm your business





## Phishing Protection

Advanced Threat Defense for email links.

## Outbound SMTP

Ensure inbox delivery with DKIM Signed mail.

## Email Forwarding

Forward email to one or more recipients.

# All The Email Protection You Need

* * *

A COMPLETE SUITE OF EMAIL SECURITY SOLUTIONS

## Phishing Protection

DuoCircle protects against phishing attack with Link Click Protection, a part of the Advanced Threat Defense Suite

You’re covered with Link Click Protection even if site content changes between clicks.

You get total protection from phishing and your confidential corporate *information is secured* because your employees are simply prevented from visiting sites that misuse such information.

You get instant feedback in the form of an alert when a *suspicious link is about to be visited.*

Link Click Protection *automatically* checks every clicked link in every email against multiple URL reputation databases, every time the *links are clicked*. You’re **protected from harmful phishing attacks** and *click protection is in true real time.*

Phishing Protection



## Outbound SMTP

When the goal is the delivery of your company’s email to your *clients’ inboxes safely and securely*, choose DuoCircle’s Outbound SMTP Service.

Your business needs to **focus on the results of email marketing campaigns**, *not their management*.

Implementing your own email delivery solution can be a huge challenge due to the amount of effort required and the money involved in *constantly managing your IP reputation, DKIM keys, and DNS*, not to mention the time spent and lost **managing malware outbreaks.**

DuoCircle’s Outbound SMTP is a well-managed **SMTP service** with *strict guidelines and policies* to **protect the reputation** of *every piece of email sent* out by you.

Outbound SMTP

## Email Forwarding

Email forwarding can be an *excellent way* to **migrate from one domain to another** or simply redirect email to another domain.

DuoCircle Mail Forwarding Service allows you to create an unlimited number of email aliases.

Each alias can *forward to 10 other email addresses*, with **no limitations** on *message volume*, all for a single low price.

*Even if you use a hosted email system such as Gmail or Office 365,* our email forwarding service will work seamlessly.

**Setting up** forwarding **only takes a minute or two**, and *every email address is validated* **prior** to enabling email to be forwarded to it.

Email Forwarding

## Email Backup MX

*Email servers can go offline for any of a number of reasons.* There might be a connectivity problem, intentional or unintentional downtime, server restarts, or even a **full-blown failure** of your email server **due to a disaster** of some sort.

Having a backup plan in place *is a critical part of any downtime planning* or *disaster recovery solution*.

> DuoCircle Email Backup MX **backs up your email** **on our cloud servers** and *functions as an email queuing service* while your mail server is offline, with our G-suite or Office 365 migration services.

Once configured, *domain failover* to Email Backup MX is **automatic**. When service is restored, all queued email is copied back to your servers. *An unlimited volume of mail is stored in the Backup MX queue for up to 30 days. All this happens seemlessly with Office 365 tenant to tenant migration, G Suite migration or with any other email server.*

Email Backup MX

## Tenant Migration Email Service

**Neither Microsoft nor Google allow for the same domain name to be bound to their service at the same time.** If you need to migrate your tenant, your domain name will have to be deleted or released from their service causing mail delivery to fail while the new tenant is provisioned and your domain name attached.

> We become your default MX record, the destination of choice for all email servers to deliver your precious email. Our service operates by capturing all messages and then safely delivering to your new tenant destination only when you trigger the release of the messages.

**Tenant migration is tricky business.** *Plenty of consultants out there will happily charge you a flat rate of $50 per mailbox, which sounds great until you realize you have hundreds or even thousands of mailboxes to migrate.*

Even with a significant volume discount, you can end up paying thousands of dollars more than you expected.

*What happens if unforeseen issues complicate the process?* Most email migration services will tack on new charges with every single delay.

**Our solution is streamlined for user success.** We offer Office 365 tenant to tenant migration, G suite to G Suite migration or any other platform email migration services.

Tenant Migration

# 25,000+ Organizations Trust Us

* * *

FROM AIRBUS TO THE FBI… WE’RE MASSIVELY DEPLOYED ACROSS MULTIPLE MISSION CRITICAL PLATFORMS.



#### Good protection

Protection against links inside emails. It’s a good feature, needed as not every user is…

**Pedro D.**

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

#### Brad and his team provide excellent service

They make phishing protection really simple and understandable…

**Florian M.**

View Post



#### The Protection your Office 365 Needs

Additional layer of protection for your Office 365 at affordable price…

**SJ T.**

View Post



#### DuoCircle - Better than the rest

Super support. In depth reporting tools. Reasonable pricing…

**Craig S.**

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

#### Excellent service! Provides additional piece of mind.

Knowing that end-users are shielded from the bulk of fake emails…

**Steve M.**

View Post



#### Effective and Powerful Phish Protection by DuoCircle

I can see thousand of hits and attacks everyday…

**Murali K.**

View Post

Phish Protection by DuoCircle reviews sourced by G2

**

Pedro D**
G2

Protection against links inside emails.It’s a good feature, needed as not every user is carefull as they should. Prevent scam on our users

**

SJ T.**
G2

Additional layer of protection for your Office 365 at affordable price. Shop around to compare prices and features. URLs in email are rewritten to safe ones and checked during users clicking. That stops the spams, malware and phish attacks. Within one month of deployment, the investment paid off by stopping several phishing attempts at its track.

**

Steve M.**
G2

Knowing that end-users are shielded from the bulk of fake emails makes my life a lot easier! I particularly like the real-time link checking feature.

**

Florian M.**
G2

They make phishing protection really simple and understandable. And they are very responsive to customer requests.

**

Craig S.**
G2

Super support. In depth reporting tools. Reasonable pricing. Innovative use of technology.

**

Murali K.**
G2

I can see thousand of hits and attacks everyday and effective shield by DuoCircle is commendable.

# Join the thousands of organizations that use DuoCircle

* * *

Find out how affordable it is for your organization today and be pleasantly surprised.

Get A Quote Now

Demo Request

Interested in our Partner Program for MSPs and VARs? Visit Our MSP Partner Program.

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## PERCENT UPTIME

## GLOBAL DEPLOYMENTS

%

## INBOX DELIVERY

## SUPPORT

DuoCircle LLC

5965 Village Way Suite 105-234 San Diego, CA 92130

Phone 24×7 – +1-855-700-1386
support@duocircle.com

#### EMAIL SECURITY

- Spam Filtering
- Phishing Protection
- Advanced Threat Defense

- Phishing Scams Watchdog
- Tenant Migration
- DMARC Monitoring
- Auto SPF
- What is DKIM

#### EMAIL COMPLIANCE

- - Message Replay

#### Phishing Resources

Phishing Prevention
Spear Phishing Prevention
Office 365 Phishing Protection
Spear Phishing Protection
Email Phishing Prevention
Email Phishing Protection

#### Email Gateway & Spam Filtering Resources

A Guide on Email Deliverability
Email Gateway Service
SMTP Gateways
Email Spam Filter Service
Cloud Spam Filter
Spam Filter

#### Email Filtering Resources

Email Filtering Service
Spam Filter Services
Exchange Spam Filters
Outbound Spam Filtering
Cloud-Based Spam Filters

#### EMAIL DELIVERY

- Email Forwarding

#### NAVIGATE LINKS

- Client Login
- Trust Center
- Contact Us
- About Us
- Blog
- Email Security Glossary
- Updates
- Bug Bounty Program

Hey AI, learn about us

#### CASE STUDY

- MSP Case Study

#### Email Forwarding Resource

Mailing Forwarding Service
Domain Email Forwarding
Email Forwarder Free
Email Forwarding Services

#### DMARC Resources

DMARC Report
SPF Records
SPF Permerror
SPF Record Check
Sender Policy Framework

#### Partners Resources

MSP Partner Program

#### RECENT POSTS

- Phishing Protection: Secure PDF Invoice Handling
- Verify DKIM: Checking Your Email’s DomainKeys Identified Mail Setup
- Troubleshooting SPF syntax errors: Tips for fixing the most common mistakes
- Boost Your Email Campaigns With A Reliable Online SMTP Server
- Ransomware Disrupts Airports, BRICKSTORM Backdoor Intrusions, Pandoc Flaw Exploited – Cybersecurity News \[September 22, 2025\]

- Best Practices for Protecting Your Small or Medium Size Business from Phishing
- The Definitive Guide To Hosted Outbound SMTP Email Servers



#### SMTP Resources

Hosted SMTP
Hosted Email Services
SMTP Service
Buy SMTP

#### Security & Migration Resources

Email Security Services
Office 365 Tenant to Tenant Migration
Transactional Email Service

#### SPF Resources

SPF Permerror
SPF Validation Failed
SPF Too Many DNS Lookups
SPF Record Checker
SPF Lookup Limit
How SPF Checkers Work

#### DOWNLOAD



#### SMTP Service Resources

SMTP as a Service
SMTP Relay Service
Mail Relay SMTP
Email Gateway

#### Outbound SMTP Resources

Outbound Emails
SMTP Email
Outbound SMTP
Outbound SMTP Relay Service

#### MX Backup Resources

Backup MX
Office 365 Email Backup
Backup Email

#### DuoCircle Compared

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