Koltrix
Guides
Migrating Aliases, Groups and Shared Mailboxes Without Losing Mail
User mailboxes get migrated. Aliases, groups and catch-alls get forgotten, then mail bounces. How to map every address before cut-over and test it after.
4 min read
Blog · Guides · page 5 of 6
Guides
Step-by-step how-tos and migration checklists you can follow from start to finish.
GuidesWhat to Do With the Old Mailbox After You Migrate
The MX records have moved and new mail is flowing. Now decide what happens to years of old email: keep it, export it, archive it, or let it go, and when.
5 min read
GuidesConverting your logo to SVG Tiny PS for BIMI
BIMI requires the SVG Tiny Portable/Secure profile. What that profile forbids, how to convert a normal SVG, and the validation errors you will likely hit.
5 min read
GuidesEmail Migration Rollback Plan: When the Cut-Over Goes Wrong
Most email migrations go fine, but the bad ones go badly fast. A rollback plan: triggers, the DNS values to save, and how to reconcile mail after reverting.
5 min read
GuidesHow to build an email triage rota for a team of three to ten
A runbook for a shared-inbox triage rota: shift length, triager duties, handoffs, fairness, holidays, and a sample two-week schedule for small teams.
4 min read
GuidesBefore Any Email Migration: Inventory Everything That Sends as You
Most email migrations break something nobody listed: a CRM, a form, a scanner. How to find every service that sends as your domain before you change DNS.
4 min read
GuidesTesting SMTP by hand with swaks and openssl
Talk to a mail server directly to see what it really says. Use swaks and openssl s_client to test auth, TLS, relaying and rejections step by step.
5 min read
GuidesFrom a Personal Gmail to a Custom-Domain Address
When to move your business off a personal Gmail address, how to tell contacts, which accounts to update first, and the registrar mistake that locks people out.
4 min read
GuidesHow to set up a support@ shared mailbox on your own domain
A step-by-step runbook for a support@ shared mailbox on your own domain: verify the domain, authenticate, grant access, add labels, auto-reply and test it.
5 min read
GuidesA 30-minute email authentication audit for your domain
A timed checklist to audit SPF, DKIM, DMARC and transport security on any domain, with the commands to run and what a passing answer looks like.
4 min read
GuidesLeaving Web-Host Email (cPanel) for a Real Business Inbox
The email bundled with your web hosting was fine to start with. Why it causes trouble as you grow, and how to move mail off cPanel without breaking your site.
5 min read
GuidesMigrating Email Away From Zoho Mail, Step by Step
How to move a domain's mail off Zoho Mail without losing messages: export options, recreating aliases and groups, DNS changes, and checking every integration.
5 min read