Notes from the email trenches.
Deliverability, DNS, protocols, pricing. Written by the team building JustEmails.
DMARC Adoption Statistics 2026: Who Enforces, Who Lags, and Why
Sourced statistics on global DMARC adoption in 2026: Fortune 500 vs SMB enforcement rates, p=none vs p=reject splits, and what the Gmail/Yahoo mandates actually changed. Every figure cited.
Email Ports Explained: 25, 465, 587, and 993 — When to Use Each
Email ports 25, 465, 587, 993 — which goes where and why ISPs block port 25.
Why Gmail Shows 'via' Next to Your Sender Name (and How to Remove It)
That 'via sendgrid.net' or 'via mailgun.org' tag next to your From name screams third-party sender. Here's what causes it, how to fix it with custom DKIM, and how to verify it's gone.
Fix Custom Domain Spam: Rspamd Tuning Guide (2026)
Stop spam on your custom domain. Real Rspamd thresholds, RBL tuning, greylisting tactics.
Handle Bounce and Complaint Webhooks: Protect Sender Reputation
Process bounces before providers throttle you.
Email Arriving Hours Late? Greylisting and Retry Queues Explained
That urgent email showed up 4 hours late. Greylisting and retry intervals explain why.
What Switching Email Providers Really Costs: Time, Risk, and Money
Real cost of switching email providers: hours per mailbox, MX cutover risk, deliverability warm-up. Worked examples at 5 and 20 mailboxes.
Cloudflare Email Routing vs JustEmails: Free Forwarding or Real Mailboxes?
Cloudflare Email Routing is free but can't send. Here's where forwarding ends and real mailboxes begin.
iCloud+ Custom Email Domain vs JustEmails: Personal Perk or Business Host?
iCloud+ custom email caps at 5 users—see why teams outgrow it fast.
Wiring JustEmails SMTP into Django Auth for Verification and Reset Mail
Configure Django's EMAIL_BACKEND with JustEmails SMTP credentials for account verification, password resets, and other auth emails that actually land in inboxes.
JustEmails API vs Loops: Transactional Email for Lean Teams (2026)
Loops vs JustEmails API for transactional email—which fits your stack?
Email Alias vs Forwarding (2026): Fix the Routing Mess
Email alias vs forwarding — one breaks SPF, one doesn't. Learn when to use each.