--- title: "Security Gateway by MDaemon Software Pricing, Alternatives & More 2026 | Capterra" description: "With the help of Capterra, learn about Security Gateway by MDaemon Software - reviews, pricing plans, popular comparisons to other Email Security products and more." source_url: "https://www.capterra.com/p/186521/Security-Gateway-for-Email-Servers/" page_type: "product" language: "en" publication_date: "2026-10-19" --- # Security Gateway by MDaemon Software Review 2026: Features, Integrations, Pros & Cons Last updated on October 19, 2026 Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Description](#description)[Use cases](#use-cases)[Alternatives](#alternatives)[FAQs](#faqs)[Features](#features)[Pricing](#pricing)[Support](#support)[Reviews](#reviews) Security Gateway by MDaemon ## What is Security Gateway by MDaemon? Powerful email protection for your entire organization. Security Gateway protects all email platforms including Microsoft Exchange, Office 365, and others from viruses, spam, phishing, data leaks and other threats by using the latest email threat detection technology and policy enforcement tools to keep good emails flowing to and from your users. The Security Gateway cloud (or on-premise) solution can be deployed quickly and easily, allowing you to focus on other important tasks. ## What is Security Gateway by MDaemon used for? [Anti-spam](https://www.capterra.com/anti-spam-software/)[Email Security](https://www.capterra.com/email-security-software/)[Secure Email Gateway](https://www.capterra.com/secure-email-gateway-software/) Top alternative Featured Overall rating Based on 15 user reviews Reviews sentiment Positive \- Neutral \- Negative \- Starting price $1 Per User, Per Month Free trial available Free version not included Capterra Shortlist charts the highest-rated and most popular products... Our "Best of" badge program showcases products with the highest ratings... Our "Best of" badge program showcases products with the highest ratings... Do you work for Security Gateway by MDaemon?[Manage this product listing](https://www.g2.com/products/mdaemon-technologies-security-gateway/claim_requests/new?auto=true) ## Compare with a popular alternative Capterra selects software alternatives based on relevant features, verified user reviews and user interactions. Placement may be influenced by client status. ### Security Gateway by MDaemon 4.9 (15) VS. [5.0 (20)](https://www.capterra.com/p/218859/Trustifi/#reviews) Starting Price $1 Per User, Per Month Starting Price $6 Flat Rate, Per Month Free Trial Free Version Pricing Options Free Trial Free Version Ease Of Use 5.0 (15) Ease Of Use 4.8 (20) Value For Money 5.0 (15) Value For Money 4.9 (19) Customer Service 4.9 (13) Customer Service 4.9 (17) ## Security Gateway by MDaemon alternatives [4.9 (12)](https://www.capterra.com/p/178083/CLEARNETWORK/#reviews) Starting price $1.50 Per User, Per Month Pricing Options Free Trial Free Version User Rating 100% of reviewers rated it above 4 stars [4.9 (50)](https://www.capterra.com/p/206740/Libraesva-Email-Security/reviews/) Starting price $5.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 100% of reviewers rated it above 4 stars [SpamTitan](https://www.capterra.com/p/168436/SpamTitan/) [4.6 (563)](https://www.capterra.com/p/168436/SpamTitan/reviews/) Starting price $1.26 Per User, Per Month Pricing Options Free Trial Free Version User Rating 93% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/168436/SpamTitan/) [SpamHero](https://www.capterra.com/p/168948/SpamHero/) [4.5 (15)](https://www.capterra.com/p/168948/SpamHero/reviews/) Starting price $7.00 Per User, Per Month Pricing Options Free Trial Free Version User Rating 100% of reviewers rated it above 4 stars [Learn More](https://www.capterra.com/p/168948/SpamHero/) ## FAQs about Security Gateway by MDaemon Overview ### Which roles and teams benefit most from Security Gateway by MDaemon? Security Gateway by MDaemon is most used by IT leaders, system administrators, and infrastructure teams responsible for protecting organizational email. They manage spam filtering, malware defense, and message policy controls. Business owners and executives benefit from reduced email security risks, while business development leaders rely on safer communications with customers and partners. Answer based on 15 reviews Overview ### What company size and specific industries is Security Gateway by MDaemon built for? Security Gateway by MDaemon is designed for small to mid-size businesses, and it also suits enterprise organizations that need a scalable email security solution. The vendor description does not name specific industries, so the intended audience is defined by company size rather than sector. Features and Usability ### What are the key features of Security Gateway by MDaemon? Security Gateway by MDaemon offers anti spam and anti virus protection, phishing protection, fraud detection, and email attachment protection for mail security. It also includes email filtering, allow/block lists, greylisting, spam quarantine, encryption, data loss prevention, archiving and retention, reporting, event logs, and two-factor authentication. Pricing ### How much does it cost and what fees or limitations are included? Security Gateway by MDaemon starts at $1 per user per month for the Hosted Security Gateway plan, covering 1 to 5000+ users. A free trial is available. No setup fees, contract terms, or other pricing limitations are listed in the provided plan data. Getting Started and Support ### What training and onboarding options does Security Gateway by MDaemon offer? Security Gateway by MDaemon provides live online sessions, documentation, and videos to help teams get started. Live online sessions support guided setup, documentation offers written reference materials, and videos provide visual walkthroughs for learning product features and configuration steps. Getting Started and Support ### What customer support options does Security Gateway by MDaemon offer? Security Gateway by MDaemon provides Email/Help Desk, FAQ/Forum, Knowledge Base, Phone Support, and Chat. No reviewer feedback is available for support experiences, so user sentiment on response times, helpfulness, or common issues cannot be summarized from the catalog data. ## Features AI summary Based on 1,078 Email Security reviews Capterra data shows that buyers of Email Security rank the following features as their top priorities: - **Threat Response** (**49%** of reviewers rated this feature as critical) - **Email Attachment Protection** (**58%**) - **Threat Protection** (**51%**) Security Gateway by MDaemon includes **Email Attachment Protection** and **Threat Protection**, helping teams block malicious files and reduce exposure to harmful email-based attacks. However, it does not offer **Threat Response**. Instead, it provides other highly rated capabilities, including **Email Filtering** (**47%**), **Spam Blocker** (**51%**), and **Phishing Protection** (**55%**), which help businesses reduce inbox threats, catch suspicious messages earlier, and maintain safer email communication for employees. Spam Blocker 5.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important Filters used to determine different types of malware threats Allow/Block List 5.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important Lists of domains/addresses that are allowed / rejected Reporting/Analytics 5.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important View and track pertinent metrics to find patterns and gain insights from data Spam Detection 5.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important Detect spam, BOT, or invalid email addresses Spam Quarantine 5.0 (1) 100.00% of 1 reviewers that rated this feature as important or highly important Feature in email systems that identifies suspicious or unsolicited emails and holds them in a separate folder for review or deletion Anti Spam Techniques to prevent and filter unwanted or unsolicited email spam from reaching a user's inbox Security Gateway by MDaemon 33 features ### All Features - Allow/Block List: Lists of domains/addresses that are allowed / rejected - Anti Spam: Techniques to prevent and filter unwanted or unsolicited email spam from reaching a user's inbox - Anti Virus: Prevents, detects and removes malware - Archiving: Stores all previously submitted documents for use in audits or future submissions. - Archiving & Retention: Moving and separately storing data that is not actively used or continuous storage of data for compliance purposes - Customizable Reports: Alter the layout and content of reports - Data Leak Prevention: Detect and prevent data breaches, exfiltration, or unwanted destruction of sensitive data. - Data Loss Prevention: Safeguard confidential data and meet compliance regulations - Disaster Recovery: Plan and implement business continuity measures in case of unforeseen events - Email Attachment Protection: Provides protection against malicious attachments. - Email Filtering: Use filters to process, organize and categorize emails to identify spam, malware and other unwanted messages - Email Management: Manage, store and organize emails within the system or via third-party apps - Email Monitoring: Ability to oversee and optimize the operations of a mail server - Email Routing: Route emails to multiple servers - Encryption: Convert data into a code for security - Event Logs: A chronological record of actions or occurrences within a network, software, or process - Filtering: Find & retrieve relevant data or documents - Fraud Detection: Identify and prevent suspicious activity - Greylisting: A request to the original server for a message to be resent - Inbox Management: Organize, prioritize, and manage incoming communications - Monitoring: Observe and track the demand, usage, progress or quality of a system, product, or user - Phishing Protection: Identify phishing emails - Policy Management: Create, manage, and track policies and procedures within an organization - Reporting: Empower brands with an intelligent reporting tool and dashborads to provide visibility into number of viewers, likes, number of asked questions, and chat entries, total number of clicks, CTR, and entire stream health - Reporting/Analytics: View and track pertinent metrics to find patterns and gain insights from data - Scheduled/Automated Reports: Set a time to generate routine reports automatically - Search/Filter: Search and filter data across systems to locate required information by entering keywords or certain criteria - Spam Blocker: Filters used to determine different types of malware threats - Spam Detection: Detect spam, BOT, or invalid email addresses - Spam Quarantine: Feature in email systems that identifies suspicious or unsolicited emails and holds them in a separate folder for review or deletion - Threat Protection: Protect incoming and outgoing communications against malware, spam, display spoofing, and other threats - Two-Factor Authentication: Extra layer of security that requires not only a password and username but also something specific to that user - Whitelisting/Blacklisting: Control system access and/or deliverability for applications and email addresses --- Features 4.8 (15) 4.8 Based on 15 reviews ## Pricing Value for money 5.0 (15) Free Trial [View pricing plan details](https://www.capterra.com/p/186521/Security-Gateway-for-Email-Servers/pricing/) Hosted Security Gateway $1.00 Per User,Per Month It includes: - Account Hijack Detection - Backscatter Protection - Callback Verification - DNS and URI Blacklists and Extract Text From Attachments - IP Shielding and Reverse Lookups Value for money 5.0 (15) 5.0 Based on 15 reviews ## Support, customer service and training options Customer Service 4.9 (13) Support - Email/Help Desk - FAQs/Forum - Knowledge Base - Phone Support - 24/7 (Live rep) - Chat Training - In Person - Live Online - Webinars - Documentation - Videos Deployment - Web - Android - iPhone/iPad Typical users - Freelancers - Small businesses - Mid size businesses - Enterprises Customer Service 4.9 (13) 4.9 Based on 13 reviews ## User reviews Overall rating 4.9 Based on 15 reviews Filter by rating Counts reflect reviews available in this feed. 5(14) 4(1) 3(0) 2(0) 1(0) Mentioned topic Recent reviews first, then most helpful Dave W. Technical overlord Used the software for: 3-5 years ### "SIEVE flexibility!" 5.0 August 26, 2019 Pros On the surface all the stuff you would expect is here, all the typical mail filtering technology just works. But the real power is when you start writing your own SIEVE rules to do things never intended by the developers. Want to only greylist conditionally? Great! Want to return customized SMTP rejection messages for certain conditions? You can! Want to do simple content filtering without learning SIEVE? The UI has all the basics covered too. The deep integration with MDaemon is a perk for me, but it works with Exchange and other platforms just as well, even including SMTP call-forwards. Cons There is a learning curve, and although all the configuration is browser-based it isn’t especially mobile friendly. JG John G. VP Used the software for: 3-5 years ### "Set and Forget" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 July 17, 2020 With Security Gateway in place I get a little better sleep at night knowing my Exchange Server and entire network is better protected from the nasty stuff out there. In recent months since the COVID pandemic started, spam and scams have spread faster than Coronavirus. As far as the MDaemon team behind the product, I can't say enough good about them. Support if every needed is TOP NOTCH, and just recently our license was due for renewal, we mailed our renewal payment in a week or two before the due date, but because of the delays in mail delivery it was stuck in the postal system for nearly 4 weeks. MDaemon without us even asking immediately issued us a 30 day temporary license key. The payment arrived a few days after that and they emailed me to let us know. Thank you MDaemon for the personal attention given to your customers, you make us feel like family !! Pros Out of the box, it's probably one of the easiest pieces of software to implement. Recently I moved our installation to a new server, what can be a nightmare with other software packages was a no brainier. I simply installed a new copy of the software on a new server, ran the Security Gateway system backup, imported it to the new installation, and BOOM just like that I was in business again. Over the years I've tweaked this or that setting to make an already great piece of work exceptional. Cons Not any cons worth mention. Would like to see an Outlook add-on button that would allow me to add any messages that make it thru (which isn't much) right to the blacklist or to spam learning. IA IT administrator IT administrator Used the software for: 3-5 years ### "Good Antispam Software" 4.0 July 17, 2020 It is a very easy system to use, easy to implement, and it helps a lot because it has several languages for which I am grateful that my native language is Spanish. Pros We implemented our own Exchange server, and we had the need to have an antispam that would help us to be free to monitor it and that the same user with a single click could release his email, and this software was what we needed Cons maybe the interface (its appearance) and the time to send reports to the user, because they have to wait every hour to see their blocked email JB Jerry B. Director of IT Used the software for: 3-5 years ### "I highly recommend SecurityGateway" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 August 14, 2019 Spam/Virus attacks have been a huge burden with every business, especially in the real estate law business. SecurityGaetway has been able to help remove that burden from my day to day with it's spam/virus protection. And now that they are offering a hosted solution, it checks off all the boxes. Pros The best part about the software is ease of installation and maintaining such a sophisticated product. I had an appliance before moving to SecurityGateway and setup was night and day compared to the appliance. Deployed SecurityGateway over a weekend and had no issues out of the box. Feature wise it beat the old application I had. Cons I really don't have any cons about the software. If there is something that isn't working for you, their support team is top notch. DO Director of IT Director of IT Used the software for: 1-3 years ### "Best antivirus/antispam solution out there for on-premises" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 4.0 4.0 Likelihood to Recommend 10/10 July 23, 2020 Overall the product has met and exceeded my expectations. It is a formidable spam filter and keeps viruses out. Once the fine tuning was done it has "just worked" which is all you can ask for. Pros We moved from Exchange Online Protection to Security Gateway after trialing several alternatives (both on-prem and cloud based). Security Gateway was the perfect sweet spot. Spam capabilities are far superior to EOP. Installation was straightforward and setup and configuration were also easy. For the price you get all the expected features and a lot of extra goodies too. The logging is top notch, very easy to see what happened to an e-mail and why. Cons I wish the Bayesian filter had a way to incorporate updates from either MDaemon or a third party for downloading known good HAM/SPAM. You can train I prefer the way GFI MailEssentials does Bayesian training and updates, much more useful. I wish it had an Outlook plugin that would allow uses to automatically whitelist/blacklist an email from right in Outlook like Mail Essentials has. I also wish there were an option for additional antivirus engines to be purchased. Shaun H. Owner Used the software for: 3-5 years ### "Great product, easy to manage and configure!" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 July 17, 2020 I use Security Gateway to filter my hosted customer domains. If setup correctly, you only have to go one place to administrate user mailboxes and distribution groups. You can fine tune the scans and security levels. Security Gateway is a very light weight heavy hitting content filter. Pros The setup with an exchange organization is quite simple. 5 minutes of setup, 10 minutes of configuration and we were in business. It has most of the mainstream features including DMARC on individual domains, alternate authentication sources and malware/antivirus scanning all in a single package. Cons The solution for secure envelope delivery does not provide the ability to host the envelope delivery https server. This incurs more cost to a significantly valuable solution, I would have liked to see the option to host the secure back end as apposed to a hosted solution. Tim K. DIRECTOR, BUSINESS DEVELOPMENT Used the software for: 3-5 years ### "IMPLEMENTING SPAM SERVICES IN TODAY’S COMPLEX EMAIL ENVIRONMENT" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 July 16, 2020 OVERALL THIS PRODUCT HAS JUST WORKED. THE FACT THAT WE WERE ABLE TO TRANSITION FROM ANOTHER SPAM SOLUTION TO THIS ONE AND KEEP THAT PROCESS AS SEAMLESS AS POSSIBLE TO OUR USERS WAS AN ADDED BONUS. OUR ONGOING TASKS WITH SECURITY GATEWAY FALL INTO TWO CATEGORIES. FIRST, SOFTWARE UPDATES. THE REAL-TIME MONITORING FEATURES UPDATE THEMSELVES AUTOMATICALLY SO THE ONLY THING THAT IS LEFT TO US IS TO PERIODICALLY UPDATE THE SOFTWARE TO NEWER RELEASES. THESE UPDATES HAVE ALWAYS BEEN SMOOTH AND EASY TO ACCOMPLISH RIGHT FROM THE WEB INTERFACE FOR SECURITY GATEWAY. SECOND, SPAM EMAIL RESEARCH. SOMETIMES IN A REAL-TIME SYSTEM, THINGS JUST DON’T GO ACCORDING TO PLAN AND FORTUNATELY SECURITY GATEWAY HAS BEEN A DREAM TO RESEARCH THESE ODD OCCURANCES. WITH SECURITY GATEWAY’S EXTENSIVE LOGGING AND REPORTING, WE HAVE ALWAYS BEEN ABLE TO RESEARCH ISSUES AFTER THEY HAVE HAPPENED AND BEEN ABLE TO EASILY MAKE ADJUSTMENTS AS NEEDED TO KEEP OUR SOLUTION RUNNING SMOOTHLY FOR OUR END USERS. Pros THIS SOLUTION HAS INTEGRATED NICELY ON OUR WINDOWS PLATFORM. INSTALLATION WAS EASY TO ACCOMPLISH AND USER INTEGRATION WAS AUTOMATIC WITH ITS EMAIL DISCOVERY PROCESS. IT WAS FANTASTIC THAT WE COULD LINK THIS TO OUR ZIMBRA HOSTING SERVER AND HAVE USERS CONTINUE TO USE A SINGLE USERID AND PASSWORD TO ACCESS THEIR SPAM SETTINGS AND MANAGE EMAIL FLAGGED AS SPAM. THE EMAIL INTEGRATION FOR END USERS AND THE ABILITY TO QUICKLY INITIATE ACTIONS FROM THE DAILY OR WEEKLY REPORTS THEY RECEIVE TO RELEASE VALID EMAIL WAS RIGHT ON TARGET. THE OTHER FEATURE WE LIKE ABOUT THIS PRODUCT IS THE ABILITY TO INVESTIGATE AND ANALYZE INBOUND EMAILS THAT HAVE BEEN FLAGGED AS SPAM. IT ALLOWS US TO EASILY DETERMINE WAHT PART OF THE SYSTEM BLOCKED THE EMAIL AND THAT THEN ALLOWS US TO MAKE ADJUSTMENTS AS NEEDED. THIS IS A FEATURE THAT GOES ABOVE AND BEYOND THE END USERS BEING ABLE TO MANAGE THEIR WHITELISTS AND BLACKLISTS TO ENSURE EASY MAIL DELIVERY. WE RELY ON THIS TO ALLOW US TO ALWAYS BE DOMAIN EXPERTS ON EMAIL ISSUES. Cons WE HAVE NOT HAD ANY ISSUES WITH THIS SYSTEM IN GENERAL AND HAVE BEEN VERY HAPPY WITH ALL THE FEATURES THAT JUST WORK LIKE YOU WOULD EXPECT THEM TO. THE QUALITY OF THE PRODUCT IS VERY GOOD. CE CEO CEO Used the software for: 3-5 years ### "Great product from a long time user" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 4.0 4.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 July 9, 2020 We have three issues paying for a hosted "cloud" solution: 1) We are supposed to have our own "cloud" and it somewhat defeats the purpose and cost efficiency to outsource this critical infrastructure. 2) You often spend equal or more money on cloud spam filtering solutions than the email account itself. 3) Do you really trust big companies and their part time employees with long term confidentiality of your emails? This product won our hearts with its simplicity, effectiveness and nearly complete feature set at a price of lower than $0.50/email/month (depending on how many emails you purchase) which also comes with support. We've tested or used a LOT of self-hosted email filtering products over the years (over 30) and although most of them can be dragged kicking and screaming into a relatively high level of functionality, I don't think we've ever used a product that did a better job out of the gate and lowered our admin and "tinkering" time as much as SecurityGateway did. Updates to the product are fairly regular and although I don't keep track I think we see them roughly 2-4 times per year which is the perfect amount since I don't want to be fiddling with it and troubleshooting possible upgrade related issues or new features more than that. We did have to hack the software in order to add 3rd party antivirus scanning as well as high availability. It's a good purchase and not one that I regret paying for year over year. Pros Ease of use High level of features Self-hosted Included dual antivirus LetsEncrypt HTTPS Included co-branding Global and domain specific override options for almost every setting Data leak prevention Encrypted attachments can be setup to require admin approval and release Active Directory integration for users, admins and email addresses Cons Lacking the ability to run external scripts against email or attachments so we can officially integrate an additional 3rd party antivirus Lacking VirusTotal attachment scanning Lacking in high availability options such as active-active or active-passive Lacking watchdog functionality to restart services if they die unexpectedly Lacking software level error reporting Lacking MSP/Hosted environment specific licensing or options Lacking a "pay for what you use" monthly billing model as opposed to a "buy a block and hope that you don't use them all up while paying for what you don't use" model. AC Anthony C. IT Team Leader / Software Developer Used the software for: 3-5 years ### "The best line of defense against Spam, Abuse and email scams" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 July 9, 2020 When I joined the company, they were using a linux based email server. It had spam assassins, some content filtering, quarantine and crappy GUI (that’s all). Getting smtp transcript was hellish and tedious task because you need to check all the log files created daily. Then, I introduced Security Gateway. It didnt take long for them to see the benefit of having this kind of system, specially if they came from nothing to something! Now, my team can search the logs by sender, recipient, subject, date or even by traffic flow, and the best thing is, you get the full result right away. This speed up the process of email related troubleshooting significantly. I’ve been using MDaemon / AltN products for almost 2 decades now, and I never get tired helping other IT Pro by introducing the best email security I know. Security Gateway is one of the best products from a renowned email system developer; MDaemon (also known as AltN Technologies) Pros This is the most complete email security software you could ever use to protect your privacy, domain, and communications. It supports all kind of antiSpam / antiAbuse such as; DKIM, SPF, DMARC, DNSBL, and many more. It’s constantly evolving to fight spam outbreaks. Not only that, you can create your own Content filter based on what you think best to ward off unwanted emails or, use a flexible script such as sieve script (powerful and advance filtering) It has built in AntiVirus that scan emails and let you decide what to do if email is infected or cannot be scanned. It has global / domain level Blacklist or whitelisting as well. Im in financial industry and we are very strict when it comes to securing sensitive information. This software has smart way scanning emails (Data Leak Prevention) and check if inbound/outbound email has sensitive information such as SSN, Credit Card, Passport number.. The beauty of it, you can decide what to do if system detected sensitive info. If you have multiple domains or email servers, this is for you. It can Protect multiple domains and they are totally separated and manageable by domain level admin. Security Gateway protects all kind of email servers. Currently, I have MDaemon and Exchange 2016/2019 behind it. And it works pretty well. There are lot of thing and possibilities for this software. I’ve been using this for a long time and I haven't seen anything that would make me replace this fine product! Cons Comparing with MDaemon (email server), this has limited action for content filter. In MDaemon, you can do alot of things when filtering email (Like; changing email headers). In Security Gateway, you would have limited action such as; reject, quarantine, redirect, copy, discard, send note, and few more (nothing about header manipulations). But dont get me wrong, security gateway’s purpose is far more superior than just using MDaemon or any email server alone. It is intended to protect your server as first line of defense. IS IT Sys Admin IT Sys Admin Used the software for: 3-5 years ### "Best in Class Email Gateway" 5.0 Overall Rating 5.0 5.0 Ease of Use 5.0 5.0 Features 5.0 5.0 Customer Service 5.0 5.0 Likelihood to Recommend 10/10 July 21, 2020 The SG is really easy to install, setup, and maintain. I have been using and maintaining it for like 10+ years now. It is solid. The logging has really helped me understand how email protocols work and has helped me observe and identify and troubleshoot both email and non-email related threats and hacking attempts. The SG cost has been reasonable and the software runs very well in unattended (auto-pilot) mode. The only times I actually access the SG are for administrative changes to user account configurations and for observing connection attempts (hacking attempts). Pros I currently administer 4 email servers: IBM (now HCL) Domino, Zimbra, Exchange, and MDaemon. The Security Gateway (SG) has been an excellent way to interface those email servers with the world and between themselves. The features I like most about the SG are: 1) Excellent logging for comprehensive visibility for what it is sending, receiving, and protecting against. 2) Great performance and the ability to maintain huge white and black lists . 3) The SG provides an XML-RPC API for I use for my own utilities that inteface it with our firewall appliances. 4) I like the Geofencing capability and virus detection. 5) I appreciate the dynamic screening that helps prevent abuse and detect hacking attempts. Cons The only non-positive thing I personally do not 100% like about the SG is managed almost completely by using a web browser. This can cause some of its user interface to be only as good as the web browser being used. [View all Reviews](https://www.capterra.com/p/186521/Security-Gateway-for-Email-Servers/reviews/) ## Top-rated software of 2026 ### Fill out the form and we'll send a list of the top-rated software based on real user reviews directly to your inbox.