Jan Demsar
Founder, Demi Solutions
Jan Demsar is the founder of Demi Solutions, the company behind DemiSignal (email authentication monitoring), DemiEmail (hands-on email help) and UTMTool (UTM link building and tracking, in use since 2018). He has built software since 2007 and has run Demi Solutions since 2010. Most of that work has been designing the systems businesses run on: ERP and CRM systems that tie sales, finance and operations together; marketing automation, analytics and email deliverability; and security across all of it, from applications and servers to email. From 2022 to 2023 he was also CTO of Design In DC, a Washington agency, where he led all technology for the agency and its clients, spanning web and app development, automation, marketing systems, SEO, security and infrastructure. Across both roles, his clients have ranged from Fortune 500 companies, an international development bank, government institutions and universities to e-commerce brands and creators.
Experience
- Founder, Demi Solutions (2010–present)
- CTO, Design In DC (2022–2023)
- Software developer since 2007
Guides by Jan Demsar
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DMARC fail: what it means and how to fix it
What dmarc=fail means, how to read it in the Authentication-Results header, and how to fix SPF and DKIM alignment for services and forwarded mail.
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DMARC policy not enabled
What the DMARC policy not enabled warning means, whether p=none affects delivery, and the safe order to move to quarantine or reject.
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No DMARC record found
Fix No DMARC record found: add the right DNS TXT record, check subdomain inheritance, and troubleshoot a record that still does not appear.