Martijn has been in the domain and email space for more than 20 years. He is a specialist in email deliverability, security, and email authentication (BIMI, DMARC, SPF, DKIM).

He founded the Dutch email service provider Measuremail in 2000 which he sold in 2020. In 2013 he founded DMARC Advisor, currently being the number 1 DMARC provider in Europe.