Technical reference
Cold email infrastructure guides
Three decisions to understand before sending: which domain to use, how much infrastructure to plan for, and what authentication can actually tell you.
Can you cold email from your main domain?
Understand when prospecting puts the domain behind your everyday business email at risk.
How many sending domains and mailboxes do you need?
Understand how volume, schedules, provider limits and business risk shape your sending setup.
SPF, DKIM and DMARC are not deliverability
Separate authentication checks from the factors that determine whether recipients see your email.
Review your current setup
Get a technical assessment of your domain and sending configuration. By email, without a sales call.
Request an audit of your domain