1. Add a domain
Point MX records to the mail host, publish SPF, enable DKIM signing, and create a DMARC record for reporting and alignment.
2. Create mailboxes
Create business inboxes, aliases, forwarding rules, and sender identities before changing production traffic.
3. Verify DNS
Check MX, SPF, DKIM, DMARC, autoconfig, autodiscover, TLS, and reverse DNS before first customer use.
4. Send transactional email
Use scoped API keys for app email. Keep product email visible through logs, suppressions, and webhook events.
5. Warm up carefully
Start with real, replyable conversations. Avoid cold blasts, bought lists, and sudden volume changes on a new domain or IP.
6. Migrate with a cutover plan
Move data from Google, Microsoft, Zoho, cPanel, or IMAP with a staged checklist and rollback window.