--- title: "About MailFlow Monitoring | DuoCircle LLC" description: "Round-trip SMTP and IMAP email infrastructure monitoring service. Real-time alerts for email delivery issues affecting your business." image: "https://mailflowmonitoring.com/images/og-default.png" canonical: "https://mailflowmonitoring.com/about/" --- About # MailFlow Monitoring Round-trip SMTP and IMAP email infrastructure monitoring service. Real-time alerts for email delivery issues affecting your business. ## Part of the DuoCircle LLC Family MailFlow Monitoring is built by [DuoCircle LLC](https://www.duocircle.com), an email security company founded in 2014\. We provide comprehensive email security solutions — from DMARC monitoring and SPF management to phishing protection and outbound email relay — trusted by businesses of all sizes worldwide. Headquarters 5965 Village Way, Suite 105-234 San Diego, CA 92130 Contact [+1-855-700-1386](tel:+18557001386) [support@duocircle.com](mailto:support@duocircle.com) ## DuoCircle Product Family [ Alumni Forwarding Enterprise Email Forwarding for University Alumni ](https://alumniforwarding.com)[ AutoSPF Automatic SPF Flattening & Email Authentication Management ](https://autospf.com)[ DMARC Report DMARC Reporting & Email Authentication Management ](https://dmarcreport.com)[ InboxIssue Email Deliverability Testing ](https://inboxissue.com)[ NuReply AI-Powered Cold Email Outreach ](https://nureply.com)[ OutboundSMTP Enterprise SMTP Relay Service ](https://outboundsmtp.com)[ Phish Protection Phishing Protection & Email Security ](https://phishprotection.com)[ Tenant Migration Email Queuing for Seamless Tenant Migrations ](https://tenantmigration.com)[ DuoCircle Trust Security and compliance evidence, on request, without the procurement gauntlet. ](https://trust.duocircle.com) ## Frequently Asked Questions What is MailFlow Monitoring? Round-trip SMTP and IMAP email infrastructure monitoring service. Real-time alerts for email delivery issues affecting your business. Who is behind MailFlow Monitoring? MailFlow Monitoring is a product of DuoCircle LLC, an email security company founded in 2014 and headquartered in San Diego, CA. DuoCircle provides email security solutions trusted by businesses worldwide. How do I contact MailFlow Monitoring support? You can reach our support team at support@duocircle.com or call +1-855-700-1386\. For sales inquiries, email sales@duocircle.com. ```json {"@context":"https://schema.org","@type":"Organization","name":"MailFlow Monitoring","url":"https://mailflowmonitoring.com","logo":{"@type":"ImageObject","url":"https://mailflowmonitoring.com/images/mailflowmonitoring-logo.png"},"description":"Round-trip SMTP and IMAP email infrastructure monitoring service. 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