Nothing to install on the Mac
Email Client for Mac: Best Email App, Software and Mail Programs for macOS
Apple Mail came with the machine and it merges your accounts already. Inboxes is for the point after that, when six mailboxes in one list is still six mailboxes of reading, and you want a model sorting them before you open the lid.
Any macOS version · No installer · Works on the PC too
The short answer
For most Mac owners the best email client is the one already installed. Apple Mail costs nothing, opens instantly, connects iCloud, Gmail, Yahoo and any IMAP host, and merges all of them into a single All Inboxes view. People go shopping past it for three specific reasons: Gmail power users want Mimestream, which is macOS native and built on the Gmail API; anyone who wants mail, calendar and contacts in one window wants eM Client or Outlook for Mac, both of which cost nothing to start; and anyone whose week spans a Mac and a PC wants a client that is not tied to Apple hardware. Inboxes is that last kind. It runs in a browser tab on either machine and tags every message with a category and a spam verdict before you read it.
Last updated August 2026
Start with what you already have
Apple Mail is better than the internet gives it credit for
Half the pages ranking for this query open by telling you Apple Mail is broken. It mostly is not, and knowing exactly where it stops is the only way to work out whether you need anything else.
It has had a unified inbox for years. The mailbox is called All Inboxes, it merges every connected account into one chronological list, and the per account inboxes stay available underneath it. If a comparison article tells you Apple Mail cannot combine accounts, that article is selling you something. The gap in Apple Mail is sorting, not merging.
It categorizes mail now, into four fixed buckets. macOS Sequoia 15.4, released at the end of March 2025, brought the categorized inbox to the Mac: Primary, Transactions, Updates and Promotions, decided by a model running on the machine rather than in a data center. Anything time sensitive from the other three also appears in Primary. That is a real feature and it did not exist two years ago.
The four names are the ceiling. You cannot rename them, add a fifth, or teach one what a client project looks like. They are consumer buckets: a receipt and a client contract are both just mail. If your problem is that work, personal and three clients arrive interleaved across five addresses, four fixed consumer categories do not touch it.
Search gets slower as accounts pile up. This is the most consistent complaint from people running five or more mailboxes in Mail, and it is the one that eventually moves them. One or two accounts, search is fine. Six accounts and several years of archive, it stops being instant.
It only exists on Apple hardware. Which is fine until the Tuesday you are on a Windows machine, a work laptop you cannot install anything on, or a Chromebook. Then your mail setup does not come with you, and you are back in five separate webmails.
None of that makes Apple Mail a bad client. It makes it a client with a shape, and the rest of this page is what the field looks like when that shape does not fit yours.
The field, compared
Email clients, email apps and mail software for Mac
Pricing taken from each vendor public pricing page and re-checked in August 2026. Almost everything here costs less than we do, and for a lot of readers one of these is the right answer.
Swipe to see all columns →
| Client | Best for | Accounts on the entry tier | Sorts automatically | Price |
|---|---|---|---|---|
| Inboxes | Several mailboxes, a Mac and a PC, nothing installed on either | 5 on the entry plan, up to 120 | Yes, AI category and spam verdict on every message | $29 a month flat |
| Apple Mail | One or two mailboxes, on Apple hardware only | Unlimited | Partly, four fixed categories since macOS 15.4 | Included with macOS |
| Outlook for Mac | Mail, calendar and contacts in one window | Multiple, including generic IMAP | Partly, a focused inbox | No subscription needed, ads without Microsoft 365 |
| Spark | The same accounts on Mac, iOS, Windows and Android | Unlimited on the no cost tier | Partly, a priority inbox | 10 EUR per user monthly, or 120 EUR a year |
| Mimestream | A Mac user whose mail is entirely Gmail | Unlimited Google accounts, 5 devices | No, Gmail labels and filters | $4.99 a month, or $49.99 a year |
| eM Client | A full suite: mail, calendar, contacts, tasks | 2 on the no cost tier, personal use only | No | 29.95 EUR a year, or 39.95 EUR once |
| Thunderbird | Unlimited IMAP accounts and the deepest filters | Unlimited | No, rules only | No license fee, open source |
| Canary Mail | Encrypted mail, PGP built in | Unlimited, but 2 devices on the no cost tier | Partly | $36 a year, or $100 a year for Pro+ |
| Mailbird | Chat and calendar panes docked beside the mail | 1 on the no cost tier | No | 4.03 EUR per user monthly yearly, or 99.75 EUR once |
Two numbers in that table move more decisions than the headline price. The first is the account cap on the entry tier, because a few euros a month often covers exactly one mailbox. The second is the sorting column, which is empty for most of the field. The full nine app breakdown, including which one we recommend over ourselves in which situation, is in our roundup of the best apps for multiple email accounts.
The case for the tab you already have open
Six reasons Mac users end up on a browser based client
A native app is the obvious answer on macOS, and usually the right one. These are the situations where being native is the part that gets in the way.
A Mac at home and a PC at work
Apple Mail and Mimestream stop at the edge of Apple hardware. If half your week happens on a Windows machine, the setup you carefully built on the Mac is not there when you need it.
A locked down work laptop
Managed Macs increasingly will not run an installer without a ticket to IT. A browser board needs no installer, no administrator password and no exception on the software allowlist.
Four categories are not enough
Primary, Transactions, Updates and Promotions cover a consumer inbox. They do not separate a client thread from a supplier thread, and you cannot add a category that does.
Search that slowed down
Mail keeps a local index that grows with every account and every year of archive. Searching server side across all accounts at once sidesteps the machine entirely.
Five accounts and one morning
Merging five inboxes gives you one longer inbox. Categorization is the feature that turns a bigger pile into a shorter one, and almost nothing else in the table above does it across accounts.
A Mac you are about to replace
Native clients keep a local store that migrates with Migration Assistant or gets rebuilt by hand. Nothing here lives on the Mac, so a new machine is a sign in rather than an afternoon.
Setup on macOS
Four steps from scattered mailboxes to a sorted board
Nothing in this sequence moves your mail or touches the Mac. It reads the protocol your provider already exposes, from the browser you already have open.
// 01
Generate an app password
With two factor authentication on, most providers issue a scoped credential rather than accepting your account password. iCloud, Gmail and Yahoo all produce one from account security settings in about a minute.
// 02
Connect each mailbox
Add the IMAP host, port and that credential per account. Common providers are detected, so in practice you paste an address and a password and the rest fills itself in.
// 03
Everything merges
Each inbox becomes one time ordered stream, every message tagged with the account it arrived on. Search runs across all of them at once, server side, so it does not slow down as the archive grows.
// 04
AI sorts before you look
A model reads each message and assigns it a category of Important, Newsletter, Notification, Spam, or Other. Archiving and junk decisions push back to the IMAP server, so your iPhone shows the same state.
Who this pays off for
Where a Mac email client earns its price
One mailbox at normal volume needs none of this. Apple Mail came with the machine and it will do. These are the situations where the spend comes back.
Consultants and solo operators
A personal iCloud address, a company address, a billing alias and one per client project. They have to stay separate for the client, but the person reading them is one person with one morning.
Designers and studios on Mac
Client mail on a studio domain, a personal address, and a portfolio address that collects inquiries. The inquiries are the ones you cannot afford to miss under a pile of supplier newsletters.
Bookkeepers and accountants
Receipts, invoices and bank notices land across several addresses and have to be found again months later. Receipts and payment confirmations land in Notification with a summary and tags attached on arrival, which beats searching four mailboxes at quarter end.
Agencies running client domains
Custom domain mailboxes on half a dozen hosts, each with its own webmail and its own quirks. IMAP is the one thing they all have in common, which is what makes a single board possible.
A Mac, a PC and a phone
The most common reason people leave Apple Mail is not a missing feature. It is a second machine that does not run macOS, and a setup that refuses to follow them onto it.
People with too many junk folders
Every provider filters differently, so five inboxes means checking five junk folders for the thing that got caught. One spam verdict applied consistently removes that chore.
Where we lose
Four limits worth knowing before you switch anything
These apply to Inboxes specifically, and on the Mac the first two land harder than they do anywhere else, because the thing you would be leaving is genuinely good.
There is no native Mac app, no offline mode and no local archive. This runs in a browser tab, which is the entire point of it when your other machine is a PC, but it also means no menu bar icon, no reading a thread on a plane, and no mail store sitting on your own disk. On macOS that is a real downgrade in feel. Apple Mail is fast, native and quiet in a way a web app is not, and if none of the reasons above apply to you, that is the tool to keep.
Microsoft 365 work and school mailboxes generally will not connect. Inboxes authenticates with a username and password or an app password. Microsoft finished retiring basic authentication for Exchange Online in April 2026, so a managed work mailbox usually refuses that connection no matter which client is asking. Personal Outlook.com and Hotmail mailboxes still work in clients that hold a Microsoft login, though never in Inboxes, which uses an app password, and Microsoft states it will fully remove basic authentication from Outlook.com as well and rely only on OAuth, so treat any Microsoft address as at risk rather than safe. Check this before anything else.
No calendar, no contacts, no tasks. Outlook for Mac and eM Client are suites, and macOS ships Calendar and Contacts alongside Mail. This is a mail client only. If you want one window holding your week as well, the comparison is not really with us.
There is no permanent no cost tier. Plans start at $29 a month flat, with 5 mailboxes on the entry plan and up to 120 on the largest. Apple Mail is included with your Mac, Outlook for Mac needs no subscription, and Thunderbird has no license fee, and all three merge accounts properly. If gathering your mailboxes into one list is the whole problem, one of those already solved it. The case for paying starts when the pile itself is what you are trying to fix.
FAQ
Questions people ask about email clients for Mac
What is the best email client for Mac?
For most people it is Apple Mail, because it is already installed, it is fast, and it merges every account into All Inboxes at no cost. You start shopping past it for a specific reason: Gmail power users want Mimestream, encryption people want Canary Mail, and anyone splitting their week between a Mac and a PC wants something that is not macOS only.
Does Mac have a built in email client?
Yes. Apple Mail ships with every Mac and needs no license or subscription. It handles iCloud, Gmail, Yahoo, Outlook.com and generic IMAP accounts, merges them into a single All Inboxes view, and since macOS Sequoia 15.4 it sorts arriving mail into four categories on device. For one or two mailboxes it is genuinely enough.
Is Apple Mail good enough?
For one or two mailboxes at normal volume, yes, and we would rather say so than sell you something. It gets thin in three places: search across many accounts slows down, the four categories are fixed consumer buckets you cannot rename, and it exists only on Apple hardware. If none of those bite, keep using it.
What is the best email client for Mac with multiple accounts?
Apple Mail, Spark, eM Client and Thunderbird all merge unlimited accounts on macOS. The differences show up in the entry tier and the sorting. Mailbird stops at one account before you pay and eM Client at two, while Thunderbird and Spark take unlimited accounts with no license fee. None of them categorize mail across accounts automatically.
Does Apple Mail have a unified inbox?
Yes, and it has had one for years. The mailbox is called All Inboxes and it merges every connected account into a single chronological list, with per account inboxes still available underneath. Anyone telling you Apple Mail cannot show a combined inbox is selling something. The gap is sorting, not merging.
Is Outlook for Mac free?
Yes. Microsoft made Outlook for Mac usable without a Microsoft 365 subscription, and it connects Outlook.com, Gmail, iCloud, Yahoo and generic IMAP accounts. The catch is advertising: without a subscription you get ads labelled as ads in the message list. Microsoft 365 subscribers get the same app without them.
What is the best email client for Mac and Gmail?
Mimestream, if Gmail is genuinely all you use. It is macOS native, built on the Gmail API rather than IMAP, so labels, filters and search behave the way they do in Gmail itself, and it costs $49.99 a year. The limitation is absolute: Gmail and Google Workspace only. One iCloud address and it stops being the answer.
What is the best email client for Mac and Windows?
Spark, eM Client, Canary Mail and Mailbird all ship builds for both, so the same accounts appear on each machine after a second setup. A browser based client removes the question instead of answering it, because the board you configure on the Mac is the same board on the PC with nothing installed on either.
Does Apple Mail sort emails into categories?
Yes, since macOS Sequoia 15.4 in March 2025. It sorts arriving mail into Primary, Transactions, Updates and Promotions using an on device model, and time sensitive messages from the other three also surface in Primary. The four names are fixed. There is no work category, no client category and no way to add one.
What is the best Mac email client for multiple accounts?
Apple Mail if two or three accounts are all Apple, Google or generic IMAP, because All Inboxes already merges them. Past that the deciding feature stops being the reader and becomes whether the client sorts what it merges. Thunderbird merges without sorting, eM Client adds a calendar, and a browser board keeps the same merged view on a PC as well.
How do I use Mac Mail with multiple accounts?
Add each account under Mail, Settings, Accounts, then open the All Inboxes view in the sidebar to see them in one list. Mac Mail with multiple accounts works well up to about three: search slows noticeably beyond that, and the four arrival categories are fixed buckets shared across every account rather than per mailbox rules.
Is there Apple Mail software for Windows?
No. Apple Mail software exists on macOS, iOS and iPadOS only, and Apple has never released a Windows build. The iCloud for Windows app does not read mail either. If you move between a Mac and a PC, an iCloud mailbox still opens over IMAP in any client, which we cover on the iCloud Mail app page.
What is the best mailbox for Mac with several addresses?
There is no single best mailbox for Mac, because the answer flips on account count. One or two: Apple Mail, already installed. Three to five across different providers: Thunderbird or eM Client, both of which merge properly. Six or more arriving faster than you read them: the problem is triage rather than the client, and merging alone will not fix it.
What is the best email app for Mac with a unified inbox?
Apple Mail for simplicity, Thunderbird for depth at no license fee, eM Client if you want the calendar too. All three give a Mac unified inbox email app view across accounts. The one thing none of them do is decide what matters: a merged list is still one long list in arrival order.
What is the best IMAP email client for Mac?
Thunderbird, if you want depth and no license fee: unlimited IMAP accounts, Unified Folders and the most capable filter engine on the platform. eM Client is the better paid option if you want mail, calendar and contacts in one window. Both connect to any host that speaks IMAP, including small providers and your own domain.
Is there a Mac email client with a calendar?
Several. Outlook for Mac and eM Client are full suites with mail, calendar and contacts in one window, and Apple Mail pairs with the separate Calendar and Contacts apps that come with macOS. If a single window holding your week matters, that narrows the field quickly, because most of the newer mail clients are mail only.
Will a Mac email client connect to my Office 365 work account?
Only if it supports OAuth. Microsoft finished retiring basic authentication for Exchange Online in April 2026, so a managed work or school mailbox now refuses a plain username and password from any client. Outlook for Mac, Apple Mail, Spark and eM Client all handle modern authentication. Personal Outlook.com addresses are a separate case.
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Read every account in one tab
Nothing to install on the Mac, and the same board opens on the PC. Connect every mailbox you own and let an AI model tag each message before you read it.