[
    {
        "role": "user",
        "content": "Can%20neomutt%20use%20mh%20or%20nmh%20format%3F"
    },
    {
        "role": "assistant",
        "content": "Yes \u2014 NeoMutt *can* use MH (and NMH)\u2010style mailboxes. Here\u2019s how MH/NMH support works in NeoMutt and how you\u2019d set it up:\n\n---\n\n## What MH / NMH Format Means\n\n- **MH / NMH mailboxes** store each email as a separate file within a directory. In a typical MH setup, there are \u201csequences\u201d (e.g. \u201cunseen\u201d, \u201cflagged\u201d, etc.), which are just files containing lists of message-filenames that represent various tags or states. Deleted messages are renamed (often with a comma prefix) rather than being removed immediately.  \n- MH differs from **Maildir** in specific file layout and state handling, but both are \u201cone file per message\u201d formats. MH is often used with NMH, MH+, or related mail tools.  \n\n---\n\n## NeoMutt\u2019s Support for MH / NMH\n\nNeoMutt supports MH folders natively in several ways:\n\n1. **Local mailbox format choice**  \n   NeoMutt can read and write four different local mailbox types: `mbox`, `MMDF`, `Maildir`, *and* `MH`. The MH format is explicitly supported. ([neomutt.org](https://neomutt.org/guide/advancedusage?utm_source=openai))\n\n2. **Automatic detection**  \n   NeoMutt auto-detects mailbox type (mbox, MH, Maildir, etc.) when you open a folder. So if you point it to a directory that looks like an MH folder (with MH-specific sequence files like `.mh_sequences`, or `.xmhcache`), it will treat it as MH. ([neomutt.org](https://neomutt.org/guide/advancedusage?utm_source=openai))\n\n3. **Mailbox creation format**  \n   When creating new folders/mailboxes, the format used is determined by the `$mbox_type` configuration variable. This may be set to `MH` (case-insensitive). Also, there\u2019s a command-line option `-m type` that achieves the same. ([neomutt.org](https://neomutt.org/man/neomutt?utm_source=openai))\n\n4. **MH-specific settings**  \n   NeoMutt has a few MH-related settings:  \n   - `$mh_seq_unseen` \u2014 which MH \u201csequence\u201d file is used to tell NeoMutt which messages are unseen. ([man.archlinux.org](https://man.archlinux.org/man/extra/neomutt/mbox_neomutt.5.en?utm_source=openai))  \n   - `$mh_seq_flagged` and `$mh_seq_replied` \u2014 for \u201cflagged\u201d or \u201creplied\u201d states in MH. ([neomutt.org](https://neomutt.org/guide/reference.html?utm_source=openai))  \n   - `$mh_purge` \u2014 to truly delete files from an MH folder rather than just renaming them. ([docs.neomutt.org](https://docs.neomutt.org/reference/config.html?utm_source=openai))  \n\n5. **Performance features**  \n   Since MH stores one file per message, opening large MH folders can be slow because many small files need to be read. NeoMutt offers *header caching* for MH folders to speed this up. ([neomutt.org](https://neomutt.org/guide/optionalfeatures?utm_source=openai))\n\n---\n\n## What \u201cNMH\u201d Specifically Implies\n\n- **NMH (\u201cnew MH\u201d)** is essentially a modernized implementation of MH. From NeoMutt\u2019s perspective, NMH folders work just like MH: the directory-plus-sequence\u2010files model. Because NeoMutt isn\u2019t executing NMH (message handling) commands itself (unless you configure it to call external tools), using NMH vs. classic MH doesn\u2019t materially change how NeoMutt reads or writes folders. It handles the file layout and sequence files directly.  \n\n---\n\n## How to Set It Up in Your Configuration\n\nHere\u2019s how you might configure NeoMutt to use MH / NMH:\n\n```muttrc\n# Use MH format when creating new mailboxes\nset mbox_type=mh\n\n# If needed, explicitly specify unseen, flagged, replied sequences:\nset mh_seq_unseen=\"unseen\"\nset mh_seq_flagged=\"flagged\"\nset mh_seq_replied=\"replied\"\n\n# For a particular folder:\nmailboxes ~/Mail/NMH\nfolder-hook ~/Mail/NMH 'set mbox_type=mh'\n```\n\nYou can also use the `-m MH` option when starting NeoMutt to force MH type for new mailboxes. ([neomutt.org](https://neomutt.org/man/neomutt?utm_source=openai))\n\n---\n\nIf you like, I can walk you through a sample setup using NMH on your system, showing full config files and common pitfalls (especially around performance and delayed sequence file updates). Do you want me to do that?"
    },
    {
        "role": "user",
        "content": "give%20me%20a%20simple%20.neomuttrc%20file%20which%20uses%20%7E%2Fmh%20as%20my%20mh%20folder"
    },
    {
        "role": "assistant",
        "content": "Here\u2019s a simple `~/.neomuttrc` file setup that uses `~/mh` as your main MH folder. You can drop this into your `~/.neomuttrc` and tweak as needed.\n\n```muttrc\n# ~/.neomuttrc \u2014 basic NeoMutt + MH setup\n\n# Personal info\nset realname = \"Your Name\"\nset from = \"you@example.com\"\nset use_from = yes\n\n# MH folder setup\nset folder = \"~/mh\"              # your MH root directory\nset spoolfile = \"+inbox\"          # uses ~/mh/inbox\nset mbox_type = MH                # mailbox format type MH / NMH\n\n# Where to store sent mails, drafts, etc.\nset record = \"+sent\"              # ~/mh/sent\nset postponed = \"+drafts\"         # ~/mh/drafts\nset trash = \"+trash\"              # ~/mh/trash\n\n# MH sequence names for states\nset mh_seq_unseen = \"unseen\"      # MH seq file for unseen messages\nset mh_seq_flagged = \"flagged\"    # MH seq file for flagged messages\nset mh_seq_replied = \"replied\"    # MH seq file for replied messages\n\n# Purge or delete MH files\nset mh_purge = yes                # removed deleted message-files, instead of renaming\n\n# Header / index display settings\nset index_format = \"%4C %Z %{%b %d} %-15.15F %s\"   # columns: flags, date, From, subject\nset sort = \"threads\"                                 # sort threads\nset sort_aux = \"last-date-received\"\n\n# Editor and pager\nset editor = \"vim\"\nset pager_index_lines = 10\n\n# Color (optional simple theme)\ncolor normal   white   black\ncolor header   green   black \"^.*:\"\ncolor attachment red   black\n\n# Mailboxes to poll (+inbox is the same as spoolfile)\nmailboxes +inbox +sent +drafts +trash\n\n# Misc\nset charset = \"utf-8\"\n\n# Auto-create folders if they don\u2019t exist (shell command hooked on startup)\nstartup-hook \"mkdir -p ~/.mh/{inbox,sent,drafts,trash}\"\n```\n\n---\n\n### What Each Section Does\n\n- **`folder` & `spoolfile`**: These tell NeoMutt where your MH mail directory is (`~/mh`) and what your inbox folder is (`inbox`). The `+` prefix is shorthand meaning \u201cunder `folder`\u201d.\n- **`mbox_type = MH`**: Ensures new mailboxes use MH format. ([mankier.com](https://www.mankier.com/5/neomuttrc?utm_source=openai))  \n- **Sequences**: `mh_seq_unseen`, `mh_seq_flagged`, `mh_seq_replied` define the names of MH sequence files used for unseen, flagged, and replied states. ([manpages.debian.org](https://manpages.debian.org/trixie/neomutt/neomuttrc.5.en.html?utm_source=openai))  \n- **`mh_purge = yes`** makes NeoMutt *really delete* message files in MH folders, rather than just renaming them (default MH behavior is to prepend a comma to delete). ([manpages.debian.org](https://manpages.debian.org/trixie/neomutt/neomuttrc.5.en.html?utm_source=openai))  \n\n---\n\nIf you like, I can also show you how to make this play nicely with external MH/NMH tools (e.g. mh-rpop, nmh commands) or syncing across machines. Do you want that?"
    }
]