About
AutoSPF
Automatic SPF flattening and email authentication management. Resolve SPF lookup limits, flatten SPF records, and maintain email deliverability across all your domains.
Part of the DuoCircle LLC Family
AutoSPF is built by DuoCircle LLC, 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
1160 Battery Street East, Suite 100
San Francisco, CA 94111
Contact
DuoCircle Product Family
Alumni Forwarding
Enterprise Email Forwarding for University Alumni
DMARC Report
DMARC Reporting & Email Authentication Management
InboxIssue
Email Deliverability Testing
MailFlow Monitoring
Round-Trip Email Infrastructure Monitoring
NuReply
AI-Powered Cold Email Outreach
OutboundSMTP
Enterprise SMTP Relay Service
Phish Protection
Phishing Protection & Email Security
Tenant Migration
Email Queuing for Seamless Tenant Migrations
Frequently Asked Questions
What is AutoSPF?
Automatic SPF flattening and email authentication management. Resolve SPF lookup limits, flatten SPF records, and maintain email deliverability across all your domains.
Who is behind AutoSPF?
AutoSPF is a product of DuoCircle LLC, an email security company founded in 2014 and headquartered in San Francisco, CA. DuoCircle provides email security solutions trusted by businesses worldwide.
How do I contact AutoSPF support?
You can reach our support team at support@duocircle.com or call +1-855-700-1386. For sales inquiries, email sales@duocircle.com.