Notes from the email trenches.
Deliverability, DNS, protocols, pricing. Written by the team building JustEmails.
Migrate From Purelymail to JustEmails: IMAP and DNS Cutover Guide
Purelymail to JustEmails migration: imapsync export, MX cutover, DNS rotation, and mail-tester verification for budget email switchers.
Migrate Fastmail to JustEmails: Full IMAP Migration Guide
Fastmail migration with imapsync, alias mapping, and DNS cutover.
Outgrowing ImprovMX: Moving From Email Forwarding to Real Hosted Mailboxes
ImprovMX forwarding fails when you need real inboxes. Here's the fix.
Migrating from MXroute to JustEmails: Moving Between Two Flat-Fee Hosts
MXroute to JustEmails: imapsync export, MX cutover, DKIM rotation, DMARC monitoring — complete runbook with mail-tester verification.
Migrate From Self-Hosted Mailcow to Managed JustEmails
Step-by-step migration from self-hosted Mailcow to JustEmails — export, IMAP sync, DNS cutover, and finally deleting that Docker stack.
Custom Domain Email: What It Costs and How to Actually Set One Up
What custom domain email costs in 2026, the exact DNS records to publish, the port that trips everyone, and the send limit nobody mentions until a tutorial breaks.
ZeptoMail Migration in 7 Steps: Port Zoho Sending, No Downtime
A step-by-step ZeptoMail migration: DKIM selector cutover, dual-send verification window, suppression list export, and webhook swap — without dropping a single password reset.
Migrate from SendGrid to JustEmails API: A Transactional Cutover Plan
How to migrate from SendGrid without tanking deliverability — and the one DNS record that breaks every old link if you delete it on cutover day.
Migrate from Zoho Mail to JustEmails: Step-by-Step IMAP Guide
Zoho Mail to JustEmails: IMAP sync, MX cutover, DKIM rotation — complete runbook.
Migrate from HEY to JustEmails When You Need Real Custom-Domain Mailboxes
Leaving HEY for Domains? Export your email and set up standard IMAP mailboxes on your custom domain for $49/year flat.
iRedMail to JustEmails: Step-by-Step Migration Guide (2026)
Migrate iRedMail without losing mail — escape the patching treadmill.
Enterprise DMARC Adoption 2027: What Public DNS Records Show
Enterprise DMARC adoption, measured from public DNS: 95% of the Fortune 500 publish a record and 41% enforce it. Here are the commands to check any domain yourself.