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Self-Hosted Email Guides

Practical guides to running your own email server, from deciding whether to self-host at all through to keeping mail out of spam folders once you do. Most apply to any self-hosted mail server; the ones that cover Vectis Mail specifically say so.

Should you self-host email?

Section titled “Should you self-host email?”
Is self-hosting email worth it in 2026?What it really costs, the deliverability bar you have to clear, and when a hosted service still wins.
Self-hosted email for small businessReal costs against Google Workspace and Microsoft 365, the deliverability bar, and a defensible starter stack.
Self-hosted email vs Google Workspace & Microsoft 365The per-seat maths, where the lines cross, the 2025–2026 price rises, and when each option wins.
Best self-hosted email servers 2026Eight options compared on mailboxes, sending API and ops burden, with one clear pick.

Setting up and running a mail server

Section titled “Setting up and running a mail server”
Docker mail server: what production actually needsThe containers are the easy part. The state, DNS, health-check and update traps that decide whether it holds up.
SPF, DKIM & DMARC setupHow the three standards work together, copy-paste DNS records, the Gmail and Yahoo sender rules, and how to verify each.
Migrate to self-hosted email with zero downtimeThe dual-send overlap, imapsync mailbox sync, SPF, DKIM and DMARC, and the MX cutover.
SMTP relay: send app email through your own serverWhen a hosted relay is the right call, and how to send app, website and device email through a server you run.
TLS certificatesHow Vectis Mail issues and renews certificates for the web, SMTP and IMAP, and how to bring your own.
Cloudflare integrationRunning Vectis Mail with Cloudflare DNS: which records must stay DNS-only, and the mistakes to avoid.
Webmail (Roundcube)The built-in webmail in Vectis Mail: logging in, reading and sending mail, and per-user Sieve filters.

Deliverability

Section titled “Deliverability”
Email deliverability best practicesDNS authentication, IP reputation, bounce handling and blocklist monitoring for a self-hosted mail server.
Port 25 blocked? How to get it unblockedHow to test for the outbound port 25 block, and how to lift it at BinaryLane, Hetzner, Vultr, Linode, AWS and other providers.
IP warmup for new mail serversWhy a new sending IP needs warming up, Vectis Mail's 30-day schedule, and the mistakes to avoid.

Fixing problems

Section titled “Fixing problems”
Troubleshooting Vectis MailDiagnose delivery failures, spam classification, TLS and login errors, DNS issues, and queue problems.
Where are Mailcow's DKIM keys?Modern mailcow keeps DKIM keys in Redis, not on disk. Where they live, how to back them up, and how to fix signing.

Getting started with Vectis Mail

Section titled “Getting started with Vectis Mail”

Ready to run your own? The installation guide takes a fresh Ubuntu server to a working mail server, and the comparison pages show how Vectis Mail stacks up against the other options.