* perf: batch-load folders, accounts, and contacts in FetchMailsAsync Replace the sequential per-mail property-loading loop with a three-step batch pre-load strategy, eliminating the N+1 DB call pattern that was the main bottleneck when building the mail list with threading enabled. Changes: - Pre-seed the folder cache from MailListInitializationOptions.Folders so that the most common folders (inbox, sent, etc.) never trigger a DB lookup at all. - Load all accounts in a single GetAccountsAsync() call instead of one GetAccountAsync() call per mail (typically 1–5 accounts total). - Fetch all sender contacts in a single SQL IN(...) query via the new GetContactsByAddressesAsync() method instead of one query per address. - Property assignment is now fully synchronous (no awaits in the loop) since all data is pre-loaded into plain Dictionary<K,V>. - Thread-expansion follows the same pattern: new folder IDs are loaded in parallel via Task.WhenAll; new contact addresses are batch-fetched with a second IN(...) query. - Also apply batch pre-loading to GetMailItemsAsync (used by merge-inbox sync path) which had the same sequential issue. - Remove the now-unused LoadAssignedPropertiesWithCacheAsync helper and the ConcurrentDictionary dependency it required. - Tighten GetMailsByThreadIdsAsync to skip the Id NOT IN clause entirely when the exclusion set is empty. https://claude.ai/code/session_018bqahGc6zi95JJhc2aARKS * test: add MailFetchingTests with correctness and performance coverage Adds integration tests for MailService.FetchMailsAsync that exercise the full real-service stack (MailService → FolderService / AccountService / ContactService) backed by the shared in-memory SQLite helper. Four tests are included: • ExpandsSiblingsOutsidePage – proves thread expansion fetches mails that fall beyond the initial SQL page (6 mails, page=4, expects 6 returned). • NeverExpandsSiblings – proves threading is truly opt-in; with CreateThreads=false the result exactly matches the raw page size. • ResolvesFromAllThreeSources – verifies contact resolution for a known contact (from the AccountContact table), an unknown sender (ad-hoc fallback), and a self-sent mail (built from account metadata). • 1000Mails_70Threads_CompletesWithinBudget – the performance scenario: 1 000 mails (70 threads × 7 + 510 standalone), 40 rotating sender addresses (20 with DB contacts). Times and reports two scenarios: - Default first-page fetch (100 mails) + expansion of one partial thread (expects > 100 mails returned). - Full load of all 1 000 mails with threading enabled (expects exactly 1 000 mails returned, all 70 threads intact, < 5 s). Elapsed times for both scenarios are written to xUnit test output so they appear in CI logs and can be tracked across builds. https://claude.ai/code/session_018bqahGc6zi95JJhc2aARKS --------- Co-authored-by: Claude <noreply@anthropic.com>
Wino Mail
Native mail client for Windows device families.
Motivation
I'm a big fan of Windows Mail & Calendars due to its simplicity. Personally, I find it more intuitive for daily use cases compared to Outlook desktop and the new WebView2 powered Outlook version. Seeing Microsoft deprecating it dragged me into starting to work on Wino a couple of years ago. Wino's main motivation is to bring all the existing functionality from Mail & Calendars over time without changing the user experience that millions have loved since the Windows 8 days in Mail & Calendars
Features
- API integration for Outlook and Gmail
- IMAP/SMTP support for custom mail servers
- Send, receive, mark as (read,important,spam etc), move mails.
- Linked/Merged Accounts
- Toast notifications with background sync.
- Instant startup performance
- Offline use / search.
- Modern and responsive UI
- Lots of personalization options
- Dark / Light mode for mail reader
Download
Download latest version of Wino Mail from Microsoft Store for free.
Beta Releases
Stable releases will always be distributed on Microsoft Store. However, beta releases will be distributed in GitHub Releases. Please keep in mind that beta releases might not be for daily use, only for testing purposes and recommended for experienced users or developers. Beta releases are also managed manually. Therefore, code in the repository might be ahead of the released Beta version at the moment. Make sure to compare versions before tryout out the Beta version.
These releases are distributed as side-loaded packages. To install them, download the .msixbundle file in GitHub releases and follow the steps explained here.
Contributing
Check out the contribution guidelines before diving into the source code or opening an issue. There are multiple ways to contribute and all of them are explained in detail there.
Donate
Your donations will motivate me more to work on Wino in my spare time and cover the expenses to keep project's website alive.
- You can donate via Paypal by clicking here
- You can buy Unlimited Accounts add-on in the application. It's a one-time payment for lifetime, not a monthly recurring payment.
