Free open-source desktop mail client for ordinary email and Italian PEC/REM. It talks IMAP, POP3, and SMTP to the mailbox you already hold at a QTSP or ordinary provider, and keeps the archive on this computer.
This app is not a qualified trust service, not a PEC operator, and not a timestamp authority. Receipts and envelopes come from the gestore; Postclient shows them.
Selected mail keeps its preview while the folder list refreshes. Delete and move use the row's folder, and opening a message is not stuck behind a catalog scan.
Folder unread and retention days stay in separate columns. A new install keeps Gmail and Outlook sign-in. Gmail Trash retention shows on the nested folder and permanently deletes old trash.
Keyword and meaning index status shows one done / total across all mailboxes, not the current folder or a single account.
Status bar indexing and meaning-index lines stay visible between batches instead of flashing.
First sync paints mail as it arrives. Meaning search DirectML prefers a discrete GPU. Trash retention, logs, and folder menus match typical desktop mail apps.
Retention moves expired folder mail to Trash. Trash can be kept forever or purged after a number of days. Delete sends messages to Trash.
The main window opens on launch from the Windows setup. Closing the window exits the app.
Folder stores replace attached Outlook data files. Gmail and Microsoft sign-in go through Identity Hub. Per-folder retention, multi-select, and IMAP/OAuth reliability fixes.
On-device meaning search, Outlook data files as mailboxes, rules, extra UI languages, and country packs.
First packaging slice: self-contained Windows setup and Linux Flatpak. Product name is a placeholder until the public sign is registered.