Dominic Landry works on email deliverability and DNS configuration: the records a domain publishes, what breaks when they are wrong, and how a sending setup gets from unauthenticated mail to DMARC enforcement without losing legitimate messages on the way.
That work sits mostly in DNS. An SPF record that quietly exceeds its ten-lookup limit, a DKIM key still flagged for testing, a subdomain nobody remembered was sending: these are the failures that show up as delivery problems long before anyone thinks to read a DMARC report.
Dominic came to email infrastructure by an unusual route, after several years working in esports. He is based in Montreal, Quebec.
Connect with Dominic on LinkedIn.
Latest from Dominic
Email sender reputation
Sep 3, 2026
How do I blacklist an email address in Gmail?
Sep 2, 2026
How do I improve email deliverability and in what order should I fix things?
Sep 2, 2026
How many SPF records can a domain have and why do multiple records cause PermError?
Sep 2, 2026
How can you check and improve your email domain reputation?
Sep 2, 2026
How do I fix the 'SPF PermError: too many DNS lookups' error?
Sep 2, 2026
What is a PTR record and how does reverse DNS use it?
Sep 2, 2026
How do you manage multiple DKIM records for one domain?
Sep 2, 2026
How does Palisade DMARC monitoring protect email deliverability?
Sep 2, 2026