📬 Your host blocks port 25? You can still receive email.
DigitalOcean, AWS, Azure, GCP — most providers block SMTP by default. But running your own mail server was never the only option.
The alternative: keep SMTP at the edge, get HTTPS in your app.
Point an MX record for inbound.yourdomain.com at an inbound service → it accepts, parses and stores the message → your app gets a signed JSON webhook. No Postfix, no MIME parsing, no port 25, no IP reputation to babysit.
What that unlocks:
ticket-*@ addresses that route replies to the right ticket — no subject-line guessing
invoices@ for document intake
A unique ingest address per customer instead of an API integration
Reply-by-email comments in your product
Just remember: verify the HMAC signature, dedupe by event_id, and don't trust the From header without a DKIM pass.
Full guide → https://postwing.app/blog/90bafa46-b789-4b81-8591-a03e5f529097
August 17, 2026 3
