FMail3 for Mac

New

• Support for multiple Fastmail accounts. Log in to another account with Fastmail’s own account menu (your avatar, top right), and FMail3 picks it up automatically.
• The Dock badge shows the unread count of all accounts together, new mail from every account gets a notification that names the account, and clicking it opens a tab of that account. The menu bar and Dock lists group unread emails by account, and every tab shows its account’s address. Settings ▸ General lets you choose which account email links from other apps and New Message write from; Fastmail’s own Compose button keeps using the account of its tab. Settings ▸ Notifications lets you choose the mailboxes per account, and the Attached Files window has an account menu. Highlights, Hookmark and Linker links, the Apple Mail link and the MCP server work with every account; an email link opens in the account of the tab you last used when the email exists in more than one account. In the Shortcuts app, Get Unread Mail Count and Search Mail have an Account option.
• New Focus filter for FMail3. In System Settings ▸ Focus, add the FMail3 filter to a Focus and choose which accounts may notify while it’s on, for example only your work account.
• Optionally the Dock badge and the unread lists then count only those accounts too. When the Focus ends, everything goes back to normal.
• Reply right from a notification: click Reply, type your answer and click Send, without opening FMail3.
• The reply goes out from the address the email was sent to (and from the right account), with the original quoted below your text, in the same conversation and saved in Sent. The original is marked as read. If sending fails, a notification tells you why and shows your text, so nothing is lost.
• Find your emails with Spotlight: turn on Show emails in Spotlight in Settings ▸ General, then search for a subject, sender or recipient with ⌘Space and choose a result to open the email in FMail3.
• FMail3 adds the subject, sender, recipients and a short preview of your emails from the last 12 months (up to 5,000 per account, Trash and Junk left out), for every logged-in account, and keeps them up to date as mail arrives or moves. It’s off by default, because anyone using your Mac can see these results; turning it off removes them from Spotlight again.
• New Settings ▸ Notifications tab: choose which new emails show a notification.
• Turn notifications or their sound off, pick the mailboxes that notify (still only the Inbox unless you change it), and list senders or domains to always or never notify for, like name@example.com or example.com. A notification for another mailbox opens that mailbox, and its Archive and Delete buttons work there too.
• Two new global shortcuts in Settings ▸ Shortcuts: New message and Open Inbox, usable from any app.
• They have no default keys; set your own.
• With Hide when losing focus turned on, FMail3 now stays visible while you log in to Fastmail, so you can look up your username or password in your password manager.
• New Fastmail Compatibility check in Settings ▸ Advanced.
• Shortly after launch, FMail3 checks that the parts of Fastmail it builds on are still there, so a Fastmail update that affects FMail3 is spotted early. Click Run Again to check at any time.
• Redesigned Settings in the style of System Settings, with grouped sections, switches and a short explanation right under each option.
• The Claude Code (MCP) options moved from Advanced to their own Settings ▸ Claude tab, where choosing an address to listen on is now a simple menu. The window always fits its content, so nothing is cut off and it only scrolls when your screen is too small.
• A short introduction for new users: a quick tour of what FMail3 can do, ending with one-click setup for the default email app, launch at login and Spotlight.
• It appears once on a first launch. Open it again at any time with Help ▸ Show Introduction.

Fixed

• On macOS Sequoia, Settings ▸ Advanced now shows all its options. Before, the lower ones were cut off, especially with the MCP server turned on.
• The window now grows and shrinks with its content, and scrolls when it doesn’t fit.
• Removing a highlight now always removes it for good. Before, it could disappear from the email and still show up in File ▸ Show Highlights, or come back later.
• The Show Highlights window now also updates right away when you add or remove a highlight, and keeps its scroll position. It also no longer shows the “Exported from FMail3” footer, which now only appears in exported files.
• If you use Fastmail with labels, emails that are only in a label now open correctly from Hookmark links, Show Email in the Attached Files window, links in exported highlights and Open Mailbox. Before, the label opened without showing the email.
• When an email is in several mailboxes, these links now open it from the Inbox if it’s there.
• With more than one Fastmail account logged in, logging out of one no longer closes the tabs of the others.
• If the MCP server couldn’t start on one of its addresses, it no longer keeps the port blocked until FMail3 is restarted.
• A new-mail notification that’s still in Notification Center after you quit FMail3 now opens its email when you click it. Before, the click started FMail3 but didn’t open the email.
• New-mail notifications are no longer skipped when FMail3 reconnects to Fastmail in the background.
• Show Raw Message now opens the email’s source in your browser once, instead of twice.
• Downloading an email as an .eml file now also works for emails that aren’t UTF-8 encoded, and FMail3 only reports “Download complete” when the file was really saved.
• If saving fails, a notification tells you why.
• Copy Apple Mail Formatted Link (⇧⌘C) now tells you when no link could be copied, for example when no email is selected, instead of seemingly doing nothing.
• Unread emails in the menu bar and Dock menu now read “Sender: Subject”.
• After restarting your Mac, FMail3 now reopens all its windows. Before, a window with a single tab could be missing and was then forgotten.