Switching From Mailbird to a Different Email Client

If you're switching from Mailbird to another email client, most of your mail isn't actually going anywhere. Mailbird works over IMAP for the accounts that matter — Gmail, Outlook.com, iCloud, most hosted business email — so your messages already live on the mail server, not inside Mailbird itself. Point a new client at the same account and the same mail shows up.

What doesn't move automatically is everything Mailbird built on top of that connection: its unified inbox layout, the app-integrations panel, custom rules, snippets, signatures, and Mailbird's own local search index. This guide covers what to check before you uninstall, the order to move accounts in, what typically breaks, and how to roll back if the new client doesn't work out.

The same steps apply whether you're leaving Mailbird's original Windows app or its newer Mac app — the account layer works identically on both. If you're specifically looking for a Mailbird alternative with AI triage rather than another rules-and-integrations tool, the last section covers what that changes about this list.

What actually moves and what doesn't#

Mailbird is a front end. For any account added over IMAP — the default for Gmail, Outlook.com, iCloud, Yahoo, and most hosted business email — your messages, folders, and read/unread state live on the provider's server. Uninstall Mailbird entirely and that mail is untouched.

POP3 accounts work differently. If an account is set to download-and-delete, that mail may exist only in Mailbird's local database. Check each account's protocol before doing anything else — this is the one step that can actually lose mail.

What doesn't move is the layer Mailbird added: the unified inbox arrangement, its app-integrations panel, custom snippets and templates, rules built inside Mailbird (as opposed to server-side Gmail or Outlook filters, which keep working no matter which client you use), signatures, and Mailbird's own local search index, stored in a file called Store.db.

A new client's version of a unified inbox looks and behaves differently from Mailbird's — expect to rebuild account order, notification settings, and layout from scratch, since that arrangement lives in Mailbird's local settings, not on any server.

Some of what feels like a Mailbird feature is actually a Mailbird-specific layer on top of IMAP, not something the protocol carries with it. Email tracking (open and click notifications), send-later scheduling, and snoozing are all built into Mailbird's client rather than stored on the mail server, so a new client needs its own version of each — or you go without until it ships one.

• Moves automatically: IMAP mail, folders, read/unread state, most attachments
• Doesn't move: unified inbox layout, app integrations, Mailbird-side rules, snippets, signatures, local search index
• At risk: any account still running as POP3 with download-and-delete enabled

Pre-migration checklist#

Do this before touching the new client. It takes under an hour for most single-user setups and prevents the two mistakes that actually cost people mail or time: exporting nothing before uninstalling, and cutting over before confirming send and receive both work on the new side.

• Confirm which accounts are IMAP vs POP3, and back up any POP3 account with Mailbird's built-in Export Tool first
• Export contacts as vCard from Mailbird's contacts view
• Write down or screenshot every rule and filter built inside Mailbird — there's no bulk export for these
• Copy signatures and any saved templates or snippets into a text file
• List the app integrations actually in use (Slack, WhatsApp, Trello, calendar) and check whether the new client supports them natively
• If Mailbird was bought recently, note the purchase date against its refund window before committing to a switch (see the FAQ below)
• Leave Mailbird installed — don't uninstall until the new client has handled a full week of mail without an issue

Steps#

Once the checklist above is done, the actual switch is mostly re-entering account credentials and rebuilding the pieces that don't transfer.

1. 1

   Add each account to the new client

   Use the same IMAP settings Mailbird has stored, or let the client auto-detect them from the email address. Gmail and some hosted accounts may prompt for a fresh sign-in or an app-specific password the first time.

2. 2

   Rebuild rules and filters

   Anything built inside Mailbird needs re-creating in the new client's rules engine. Filters set up directly in Gmail or Outlook's own settings keep working no matter which client is connected.

3. 3

   Recreate signatures and templates

   Paste the text saved during the checklist step into the new client's signature and template settings. This is manual in almost every client — there's no standard export format for it.

4. 4

   Replace app integrations

   Check whether the new client has native Slack, WhatsApp, or calendar support. If it doesn't, keep using those tools as standalone apps rather than expecting a client-side panel to replicate Mailbird's.

5. 5

   Import contacts

   Import the vCard file exported earlier. Most clients accept it directly; a few need it converted to CSV first.

6. 6

   Set the new client as default and update notifications

   Change the OS's default mail handler, then turn off Mailbird's notifications so incoming mail doesn't trigger doubled alerts.

What breaks#

Some of this is obvious once you've done it. Laid out ahead of time, it's a checklist rather than a surprise.

Rollback plan#

Because the accounts moved are IMAP, rolling back is almost free. Reopen Mailbird and every account is exactly where it was left — nothing was deleted from the server, and Mailbird's own settings and Store.db are untouched as long as it wasn't uninstalled.

What would be lost is the setup work already redone in the new client: rules, signatures, and integration replacements. Keep a copy of what was rebuilt so restarting isn't from zero if the switch happens a second time.

Doing it without downtime#

The risk during a migration isn't losing mail — it's replying twice, or missing something because notifications are split across two apps. Both clients poll the same IMAP accounts at once without conflict, so running them in parallel for a few days is safe.

Turn off notifications in one app while actively working in the other, and pick a single client to send from during the overlap so the same reply doesn't get drafted twice. Teams sharing an inbox should agree on one cutover time rather than migrating account by account — a rule or a delegation set up in one client mid-switch is easy to lose track of.

Do the actual account re-adding outside the busiest hours. Re-authenticating an account can briefly interrupt sync, and a paused inbox during a live thread is the part of this that actually annoys people.

If Mailbird's email tracking or send-later scheduling is part of the daily workflow, check the new client's equivalent before cutover day rather than after. A scheduled send sitting in Mailbird's queue when the account moves doesn't follow the account — it stays queued in the app that's no longer being checked.

Why this list is this long#

The reason this list runs to rules, snippets and integrations is that Mailbird keeps all of it in its own local settings rather than syncing it anywhere portable — so every switch means rebuilding it by hand, on both ends.

AI Emaily keeps that layer on the account instead of in one app's cache: filing rules, saved replies, and a Personal Context brain set by the user, not tied to a single desktop install. It replaces Mailbird's app-integration panel with one agent that triages and drafts across Gmail, Outlook and IMAP accounts in a single inbox, with every send held for approval first. We build AI Emaily, and it connects the same way Mailbird does — over IMAP, to the accounts already in use.