Mail's Best Friend protects with the best in email security. Our solutions, products and service provide mail administrators superior protection from spam, malware, phishing attacks, and more. Everything Email!

Affordable Exchange, O365 Alternative. Flexible Deployment Options Hosted, Virtual or On-Premise.

Self hosted: runs on Linux, Windows, or Docker. Total control. Total privacy.

Over 15,000,000 users trust SmarterTools to help communicate, analyze and support their businesses. 

In sync with business-class email Access email, contacts, and shared calendars anywhere.

Free and open-source mail transfer agent (MTA) that routes and delivers electronic mail.  

Cross-platform intelligent, anti-spam pattern recognition engine with collaborative AI.

MailStore Server is one of the world’s leading solutions for email archiving. Easy to install, reliable and low-maintenance.

Enterprise-class email, calendar collaboration solution built for the cloud, both public and private. 

Windows Mail Server software with features comparable to Microsoft Exchange.

Open Source Mail Server Solution. CentOS Stream, Rocky, Alma, Debian, Ubuntu, FreeBSD, OpenBSD

Simple and secure email. Prevent malware, ransomware and other advanced threats from compromising your email.

Timely and quality technical support by email experts. Our team averages 90% resolution on the first contact.

Need services. Email server migrations. DKIM or email redundancy. Backup MX or transitional store and forward.

Customized and managed web solutions. Reducing costs and improving performance.

Maximize Email Deliverability with a complete set of DNS Records DMARC, SPF, DKIM, ARC

SPF Flattening Without the Unwanted Add-ons. Conquer the 10-Record SPF Limit of Too many DNS lookups.

Send and receive email using your own domain name when your email server is down.

Got Email Delivery Problems? Roundtrip SMTP Email Server Monitoring

DMARC compliance reporting for MSPs, service providers, and businesses who need to monitor domains.

Protect your business from phishing, impersonation and ransomware attacks.

Next-generation security, continuity and compliance. Offerings Email Security Gateway,  Load Balancer and Archiver.

Complete DMARC Protection. Take control of your email reputation and secure the delivery of your messages.

Preserve encrypted emails in a secure, easy to access archive for compliance, e-discovery and legal hold.

Phishing simulator analyzes vulnerabilities and identifies high risk employees and tracks their progress over time.

The original anti-spam software for SmarterMail and IMail. Cross-platform Declude Reboot in development. 


Free Anti-spam software designed specifically to integrate with iMail and SmarterMail.

Managed DNS

Managing your DNS can be quite complex. We can manage your DNS services for you.

Email Consultants

We provide a broad range of Email support, we can help diagnose and solve your Email issues.


About Us

We build and maintain the best email solutions in the world. Offering, fully integrated email solutions using best-of-breed components. fully customized integration, support, and management resources. solutions that reduce costs, improve performance, and provide a sustainable competitive advantage.


Mailing Address:
Mail’s Best Friend
550 Rockbridge Dr. SE
Leesburg VA, 20175

Company Info:
Phone: 703.988.3605
Fax: 703.880.7027

Business Hours
Monday – Friday
9:00AM to 6:00PM EST

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