SPF, DKIM, and DMARC are required. Without them, your emails land in spam regardless of sequence quality.
Settings → Sending Domains → Add Domain. Use a subdomain (e.g., mail.yourcompany.com) to protect your root domain.
v=spf1 include:smtp.lgai.io ~all
s1._domainkey.mail.yourcompany.com → s1.domainkey.lgai.ios2._domainkey.mail.yourcompany.com → s2.domainkey.lgai.io
At _dmarc.mail.yourcompany.com: v=DMARC1; p=none; rua=mailto:[email protected]; pct=100
Start at p=none — monitor-only, it changes nothing about how your mail is delivered. The reports it generates are how you find a legitimate sender you forgot about (a ticketing system, an invoicing tool, a mailing list) before anything of yours gets blocked. Once those reports come back clean, move to p=quarantine, then p=reject, raising pct gradually rather than enforcing everything on day one.
Settings → Sending Domains → Verify. DNS propagation: 2–48 hours. All three must be green.
Do not launch campaigns until all three records are verified green.