--- title: Mailflow Monitoring Reviews meta\_title: 'Mailflow Monitoring Reviews 2026: Details, Pricing, & Features | G2' meta\_description: Filter reviews by the users' company size, role or industry to find out how Mailflow Monitoring works for a business like yours. aggregate\_rating: rating\_value: 5.0 review\_count: 4 scale: '5' date\_modified: '2025-06-17' parent\_category: name: Confidentiality url: https://www.g2.com/categories/confidentiality --- # Mailflow Monitoring Reviews & Product Details Claimed ###### Profile Status This profile is currently managed by Mailflow Monitoring but has limited features. Are you part of the Mailflow Monitoring team? [Upgrade your plan](https://sell.g2.com) to enhance your branding and engage with visitors to your profile! Mailflow Monitoring alerts you, in real-time, to down email servers and helps diagnose excessive delivery delays. Things that can negatively impact your business if not corrected quickly. And it's FREE. * * * Seller [DuoCircle LLC](https://www.g2.com/sellers/duocircle-llc) Discussions [Mailflow Monitoring Community](https://www.g2.com/products/mailflow-monitoring/discuss) Overview by Brad Slavin (Email Security) Show More ## Top-Rated Alternatives [ ![Valimail](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Valimail") Valimail 4.5/5(592) ](https://www.g2.com/products/valimail/reviews) [ ![Brevo Marketing Platform](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Brevo Marketing Platform") Brevo Marketing Platform 4.5/5(2,621) ](https://www.g2.com/products/brevo-marketing-platform/reviews) [ ![Validity Engage](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Validity Engage") Validity Engage 4.5/5(989) ](https://www.g2.com/products/validity-engage/reviews) [ View All Alternatives ](https://www.g2.com/products/mailflow-monitoring/competitors/alternatives) ![Kiran M.](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Kiran M.") KM Kiran M. Freelance Marketing and Advertising Small-Business (50 or fewer emp.) 12/4/2023 "Best tool to know my mails is being delivered" 5/5 What do you like best about Mailflow Monitoring? This tool monitors real-time mail servers which helps me to send emails efficiently. I am getting notified immediately if there is any problem with the sender's email. The best thing is it's FREE. Review collected by and hosted on G2.com. What do you dislike about Mailflow Monitoring? There is nothing much that I came across while using this tool. Review collected by and hosted on G2.com. What problems is Mailflow Monitoring solving and how is that benefiting you? Free SMTP Email server monitoring and increasing efficiency in sending emails Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite BB Brandon B. Engineering Associate Small-Business (50 or fewer emp.) 3/2/2023 "Free Peace of Mind" 5/5 What do you like best about Mailflow Monitoring? The software is free. It helps our company ensure that our email server is operating correctly and we are not missing out on important emails or losing productivity. Review collected by and hosted on G2.com. What do you dislike about Mailflow Monitoring? Currently, I do not have anything I dislike. Review collected by and hosted on G2.com. What problems is Mailflow Monitoring solving and how is that benefiting you? This software gives us peace of mind that our email servers operate as they should. This allows us to troubleshoot when something goes wrong quickly. Review collected by and hosted on G2.com. Show More Validated ReviewerIncentivizedSource: G2 invite TR Tyler R. Monitoring Systems Engineer Mid-Market (51-1000 emp.) 2/2/2021 "Awesume, simple, bulletproof elegent service and it's FREE!!!" 5/5 What do you like best about Mailflow Monitoring? It's compex enough to do what you need it to do but so simple and elegent to setup, and it's FREE! Review collected by and hosted on G2.com. What do you dislike about Mailflow Monitoring? The archive button for a mail monitor just archives the mail monitor, not the previous history, but it doesn't prompt or tell you this nor can you restore it. Minor problem. Devs are fixing it :-) Review collected by and hosted on G2.com. Recommendations to others considering Mailflow Monitoring: Just signup setup your monitors and never look back :-) Review collected by and hosted on G2.com. What problems is Mailflow Monitoring solving and how is that benefiting you? Complete mail loop flow testing. We now know within minutes when a mail flow has gone offline. Review collected by and hosted on G2.com. Show More Validated ReviewerSource: Organic ![Verified User in Computer Software](/assets/icons/anonymous-avatar-purple-4ae1032bdb50ee5682003170c8184aee790d25958bd397abbd384ba52c596a7b.svg "Verified User in Computer Software") AC Verified User in Computer Software Small-Business (50 or fewer emp.) 4/28/2020 "Cleanest approach to insure E-Mail service functionality, end-to-end." 5/5 What do you like best about Mailflow Monitoring? Easy to configure, low cost ($0). Since it is an outside service, it is the cleanest approach to insure E-Mail Services, end-to-end. It takes a bit of skill to setup your local E-Mail server with the proper forwarding rules, but once done, you can configure the frequency of mail checks. The service sends a test E-Mail to your server, with specific identifying details. You then configure your forwarder to respond to this automated E-Mail with the properly configured response. This tests the following flow (for my use case):P MailFlow Monitor sends E-Mail DuoCircle mail filtering received the E-Mail Proper spam and virus checks are run DuoCircle forwards to my local E-Mail Server My local E-Mail server performs local spam/virus checks [Amavisd/clamd + Postfix + Dovecot + Sieve] postfix automatically responds to special E-Mail address outbound.mailhop.org receives response outbound.mailhop.org sends to original MailFlow Monitor -- IF HERE, WITHIN SMALL TIME-FRAME, SUCCESS -- Review collected by and hosted on G2.com. What do you dislike about Mailflow Monitoring? The service uses up some of my outbound.mailhop.org outgoing E-Mail quota. You pay for 150/day x N [N has a cost] Review collected by and hosted on G2.com. Recommendations to others considering Mailflow Monitoring: Make sure to consider the compromise between ping frequency, and cost of any outgoing E-Mail. Review collected by and hosted on G2.com. What problems is Mailflow Monitoring solving and how is that benefiting you? If the above flow does not get to the end-point, I get a txt message, and an E-Mail to an outside E-Mail service. I always know the status of my E-Mail, and do not constantly needs to check. Review collected by and hosted on G2.com. Show More Current UserValidated ReviewerSource: Seller invite ### There are not enough reviews of Mailflow Monitoring for G2 to provide buying insight. 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Visit the vendor’s website to learn more. 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