| ►Address | Email Address Handling |
| Email address | Representation of an email address |
| Address groups | Handling for email address groups |
| International domain names | Handling of international domain names |
| ►Alias | Email Aliases (Address Book) |
| Alias for an email address | Representation of a single alias to an email address |
| Array of Alias Views | Array of Alias Views |
| Alias commands | Alias commands |
| Alias Config | Config used by libalias |
| Address Book Dialog | The Address Book Dialog allows the user to select, add or delete aliases |
| Address Query Dialog | The Address Query Dialog will show aliases from an external query |
| Alias functions | Alias functions |
| Shared code for alias dialogs | Shared code for the Alias and Query Dialogs |
| Reverse Alias lookups | Manage alias reverse lookups |
| Alias sorting | Address book sorting functions |
| ►Attachments | Attachment handling |
| Email attachments | Handling of email attachments |
| Attachment commands | Handle the attachments command |
| Attachment Content-ID header functions | Attachment Content-ID header functions |
| Attachment Selection Dialog | The Attachment Selection Dialog lets the user select an email attachment |
| Attachment functions | Attachment functions |
| Attachment library | Attachment helper functions |
| Shared attachments functions | Handling of email attachments |
| Private state data for Attachments | Private state data for Attachments |
| Attachment functions | Attachment code |
| ►Autocrypt | End-to-end encryption |
| Autocrypt shared code | Autocrypt end-to-end encryption |
| Autocrypt Config | Config used by libautocrypt |
| Autocrypt database handling | Autocrypt database handling |
| Autocrypt account dialog | The Autocrypt Account Dialog lets the user set up or update an Autocrypt Account |
| Autocrypt functions | Autocrypt functions |
| Autocrypt GPGME handler | Autocrypt GPGME handler |
| Autocrypt database schema | Autocrypt database schema |
| ►Body (Message) Cache | Body Caching (Local copies of email bodies) |
| Body Cache functions | Body Caching (Local copies of email bodies) |
| ►Mailbox Browser | Select a Mailbox from a list |
| File/Mailbox Browser Dialog | The File/Mailbox Browser Dialog lets the user select from a list of files or mailboxes |
| Config used by libbrowser | Config used by libbrowser |
| Browser functions | Browser functions |
| Private data for the Browser | Private state data for the Browser |
| Browser sorting | Browser sorting |
| ►Color | Colour handling code |
| ANSI Colours | Handle ANSI Colours used in the Pager |
| Colour and attributes | The colour and attributes of a graphical object are represented by an AttrColor |
| Color and attribute parsing | Color and attribute parsing |
| Parse colour commands | Parse NeoMutt 'color', 'uncolor', 'mono' and 'unmono' commands |
| Curses Colour | A wrapper that represents a colour in Curses |
| Colour Debugging | Lots of debugging of the colour code, conditional on ' |
| Merged colours | When multiple graphical objects meet, it's often necessary to merge their colours |
| Colour notifications | Manage the notifications of Colour changes |
| Quoted-Email colours | Manage the colours of quoted emails |
| Regex Colour | A set of regexes and colours that should be applied to a graphical object, e.g Body of an Email |
| Simple colour | Manage the colours of the 'simple' graphical objects – those that can only have one colour, plus attributes |
| ►Auto-completion | Auto-complete a string |
| String auto-completion routines | String auto-completion routines |
| String auto-completion data | String auto-completion data |
| Auto-completion helpers | Auto-completion helpers |
| ►Compressed Mailbox | Compressed mbox local mailbox type |
| Compressed mailbox functions | Compressed mbox local mailbox type |
| ►Compose an Email | Compose an email |
| Attachments window | The Compose Attachments Window displays the attachments of an email |
| Attachment Data | Compose Attach Data |
| Compose Bar (status) | The Compose Bar Window displays status info about the email |
| Compose Bar Data | Compose Bar Data |
| Compose Email Dialog | The Compose Email Dialog lets the user edit the fields before sending an email |
| Config used by Compose | Config used by libcompose |
| Compose functions | Compose functions |
| Compose Shared Data | Compose Shared Data |
| ►Compression functions | Data compression |
| Shared compression code | Shared compression code |
| LZ4 compression | LZ4 compression |
| ZLIB compression | ZLIB compression |
| Zstandard (zstd) compression | Zstandard (zstd) compression |
| ►Config | User configurable variables |
| Type: Email address | Config type representing an email address |
| Type: Boolean | Config type representing a boolean |
| Cache of config variables | Cache of config variables |
| Validate charset | Validate the "charset" config variables |
| Dump all the config | Dump all the config items in various formats |
| Type: Enumeration | Config type representing an enumeration |
| Helper functions to get config values | Helper functions to get config values |
| Type: Long | Config type representing a long |
| Type: Multi-byte character table | Config type representing a multibyte character table |
| Type: Number | Config type representing a number |
| Type: Path | Config type representing a path |
| Type: Quad-option | Config type representing a quad-option |
| Type: Regular expression | Config type representing a regular expression |
| Config Set | A collection of config items |
| Type: List of strings | Config type representing a list of strings |
| Type: Sorting | Config type representing a sort option |
| Type: String | Config type representing a string |
| Subset of config items | Subset of config items |
| Type: MyVar | Config type representing a user-defined variable "my_var" |
| ►Network connections | Network connections and their encryption |
| Connection Credentials External Command | Connection Credentials External Command |
| Config used by libconn | Config used by libconn |
| Connection Credentials | Connection Credentials |
| Certificate Verification Dialog | The Certificate Verification Dialog lets the user check the details of a certificate |
| DNS lookups | DNS lookups |
| GnuTLS encryption | Handling of GnuTLS encryption |
| GNU SASL authentication support | GNU SASL authentication support |
| OpenSSL encryption | Handling of OpenSSL encryption |
| Low-level socket code | Low-level socket handling |
| SASL authentication | SASL can stack a protection layer on top of an existing connection |
| SASL plain authentication | SASL plain authentication support |
| Low-level socket handling | Low-level socket handling |
| Network tunnelling | Support for network tunnelling |
| Zlib compression of network traffic | Zlib compression of network traffic |
| ►File Charset Conversion | Convert files between different character encodings |
| Content Info Extraction | Extracting content info from email body |
| File Charset Conversion | Converting files between charsets |
| NeoMutt Commands | NeoMutt Commands |
| ►Core NeoMutt objects | Backbone objects of NeoMutt |
| Account object | A group of associated Mailboxes |
| Dispatcher of functions | Dispatcher of functions |
| Mailbox object | Representation of a Mailbox |
| NeoMutt object | Container for Accounts, Notifications |
| Create Temporary Files | Create Temporary Files |
| ►Debug Code | Debugging code |
| Code backtrace | Code backtrace |
| Shared debug code | Shared debug code |
| Dump an Email | Dump an Email |
| GraphViz dot file | Create a GraphViz dot file from the NeoMutt objects |
| Dump all notifications | Dump all notifications |
| Pager Debugging | Pager Debugging |
| Dump the Windows | Dump the details of the nested Windows |
| Debug names | Debug names |
| ►Email code | Structs that make up an email |
| Body of an Email | Representation of the body of an email |
| Email object | Representation of an email |
| Envelope (Email header) | Representation of an email header (envelope) |
| Who is the email from? | Determine who the email is from |
| Global Variables | These global variables are private to the email library |
| Data for MIME encoding | Constants and macros for managing MIME encoding |
| Attributes for a MIME part | Store attributes associated with a MIME part |
| Email parsing code | Miscellaneous email parsing routines |
| RFC2047 encoding / decoding | RFC2047 MIME extensions encoding / decoding routines |
| RFC2231 MIME Charset functions | RFC2231 MIME Charset routines |
| Email tags | Driver based email tags |
| Email threading | Create/manipulate threading in emails |
| Parse URL schemes | Parse and identify different URL schemes |
| ►Mailbox Enter | Select a Mailbox from a list |
| Enter buffer | Enter buffer |
| Enter functions | Enter functions |
| State of text entry | State of text entry |
| GUI ask the user to enter a string | GUI ask the user to enter a string |
| ►Envelope-editing Window | Envelope-editing Window |
| Envelope functions | Envelope functions |
| Envelope Window Data | Envelope Window Data |
| Envelope Window | The Envelope Window displays the header fields of an email |
| ►Graphical code | Curses and Window code |
| Window drawing code | GUI miscellaneous curses (window drawing) routines |
| Dialog Windows | A Dialog is an interactive set of windows allowing the user to perform some task, e.g |
| Global functions | Global functions |
| Message Container | Message Container |
| Message Window | The Message Window is a one-line interactive window at the bottom of the screen |
| Wrapper around Curses | Wrapper functions around Curses |
| Window management | Window management |
| Window reflowing | Window reflowing |
| Root Window | NeoMutt is built from a set of nested windows |
| Simple Bar (status) | The Simple Bar is a simple non-interactive window to display a message or trivial status information |
| Simple Dialog | The Simple Dialog is an interactive set of windows containing a Menu and a status bar |
| Set the terminal title/icon | Set the terminal title/icon |
| ►Email Header Cache | Cache of Email headers |
| Config used by Header Cache | Config used by libhcache |
| Header cache multiplexor | This module implements the gateway between the user visible part of the header cache API and the backend specific API |
| Email-object serialiser | Email-object serialiser |
| ►Help bar | Help line showing key bindings |
| Help Bar Window | The Help Bar is a non-interactive window that displays some helpful key bindings for the current screen |
| Config used by Help Bar | Config used by Help Bar |
| Data for the Help Bar | HelpbarWindowData stores the state of the Help Bar |
| ►History | Read/write command history from/to a file |
| Config used by the history | Config used by libhistory |
| History Selection Dialog | The History Selection Dialog lets the user choose a string from the history, e.g |
| History functions | History functions |
| History file handling | Read/write command history from/to a file |
| ►Imap Mailbox | IMAP network mailbox |
| Account data | Imap-specific Account data |
| Authenticator multiplexor | IMAP authenticator multiplexor |
| Anonymous authentication | IMAP anonymous authentication method |
| CRAM-MD5 authentication | IMAP CRAM-MD5 authentication method |
| GNU SASL authentication | IMAP GNU SASL authentication method |
| GSS authentication | IMAP GSS authentication method |
| Login authentication | IMAP login authentication method |
| OAUTH authentication | IMAP OAUTH authentication method |
| Plain authentication | IMAP plain authentication method |
| SASL authentication | IMAP SASL authentication method |
| Mailbox browser | GUI select an IMAP mailbox from a list |
| Send/receive commands | Send/receive commands to/from an IMAP server |
| Config used by IMAP | Config used by libimap |
| Imap-specific Email data | Imap-specific Email data |
| IMAP network mailbox | Support for IMAP4rev1, with the occasional nod to IMAP 4 |
| Imap-specific Mailbox data | Imap-specific Mailbox data |
| IMAP messages | Manage IMAP messages |
| IMAP Message Sets | Manage IMAP message sets, ordered compressed lists of Email UIDs |
| MSN helper functions | IMAP MSN helper functions |
| Search routines | IMAP search routines |
| UTF-7 Manipulation | Convert strings to/from utf7/utf8 |
| IMAP helper functions | IMAP helper functions |
| ►Index | Display a list of Emails |
| Config used by the Index | Config used by libindex |
| Index Dialog | The Index Dialog is the main screen within NeoMutt |
| Index functions | Index functions |
| Index Bar (status) | The Index Bar Window displays status info about the email list |
| Index Window | The Index Window displays a list of emails to the user |
| Index Panel | The Index Panel is a non-interactive container around the email list and a status bar |
| Private data for the Index | Private state data for the Index |
| Shared data | Data shared between Index, Pager and Sidebar |
| ►Maildir Mailbox | Maildir local mailbox type |
| Config used by Maildir | Config used by libmaildir |
| Maildir-specific Email data | Maildir-specific Email data |
| Maildir local mailbox type | Maildir local mailbox type |
| Maildir-specific Mailbox data | Maildir-specific Mailbox data |
| Maildir Email helper | Maildir Email helper |
| MH local mailbox type | MH local mailbox type |
| MH Mailbox Sequences | MH Mailbox Sequences |
| Maildir/MH local mailbox type | Maildir/MH local mailbox type |
| ►Mbox | Mbox local mailbox type |
| Config used by libmbox | Config used by libmbox |
| Mbox local mailbox type | Mbox local mailbox type |
| ►Menu | A selectable list |
| Config used by libmenu | Config used by libmenu |
| Paint the Menu | Paint the Menu |
| Menu functions | Menu functions |
| GUI present the user with a selectable list | GUI present the user with a selectable list |
| Change the Menu's position/selection | There are two types of movement function: |
| Menu notification observers | Menu notification observers |
| Tagging support | Tagging support |
| Menu types | Menu types |
| Window wrapper around a Menu | The Menu Window is an interactive window that allows a user to work with a list of items |
| ►Mixmaster | Support of Mixmaster anonymous remailer |
| Mixmaster Chain Data | Mixmaster Chain Data |
| Mixmaster Remailer Dialog | The Mixmaster Remailer Dialog lets the user edit anonymous remailer chain |
| Mixmaster functions | Mixmaster functions |
| Mixmaster Remailer | Mixmaster Remailer |
| Mixmaster Remailer | Mixmaster Remailer |
| Mixmaster Chain Window | Display a menu of Remailer Hosts for the user to select |
| Mixmaster Hosts Window | Display and editable list of selected Remailer Hosts |
| ►Mutt | Shared code for handling strings, files, dates, etc |
| Linear array API | API to store contiguous elements |
| Parse a number in a string | Parse a number in a string |
| Conversion to/from base64 encoding | Convert between binary data and base64 text, according to RFC2045 |
| Helper object for storing and parsing strings | The Buffer object make parsing and manipulating strings easier |
| Conversion between different character encodings | Conversion between different character encodings |
| Time and date handling routines | Some commonly used time and date functions |
| Private copy of the environment variables | Private copy of the environment variables |
| Case-insensitive fixed-chunk comparisons | These functions are much faster for short strings than calling mutt_istr_equal(), and are not affected by locale in any way |
| Leave the program NOW | The default behaviour on a critical error is to notify the user, then stop |
| File management functions | Commonly used file/dir management routines |
| Pass files through external commands (filters) | Pass files through external commands (filters) |
| Hash Table data structure | Hash Table data structure |
| Singly-linked list type | Singly-linked list of strings |
| Logging Dispatcher | Logging Dispatcher |
| Map between a string and a constant | Map a string to a constant and vice versa |
| Multi-byte String manipulation functions | Some commonly-used multi-byte string manipulation routines |
| Calculate the MD5 checksum of a buffer | Calculate the MD5 cryptographic hash of a string, according to RFC1321 |
| Memory management wrappers | "Safe" memory management routines |
| Notification API | Notification API |
| Path manipulation functions | Path manipulation functions |
| A global pool of Buffers | A shared pool of Buffers to save lots of allocs/frees |
| Manage precompiled / predefined regular expressions | Manage precompiled / predefined regular expressions |
| Context-free sorting function | Context-free sorting function |
| Random number/string functions | Random number/string functions |
| Manage regular expressions | Manage regular expressions |
| Signal handling | Signal handling |
| A separated list of strings | A separated list of strings |
| Keep track when processing files | Keep track when processing files |
| String manipulation functions | Lots of commonly-used string manipulation routines |
| ►Ncrypt | Encrypt/decrypt/sign/verify emails |
| Config used by libncrypt | Config used by libncrypt |
| Signing/encryption multiplexor | Signing/encryption multiplexor |
| Wrapper for PGP/SMIME calls to GPGME | Wrapper for PGP/SMIME calls to GPGME |
| Register crypto modules | Register crypto modules |
| Wrappers for calls to CLI PGP | Wrappers for calls to CLI PGP |
| Wrappers for calls to GPGME PGP | Wrappers for calls to GPGME PGP |
| Wrappers for calls to CLI SMIME | Wrappers for calls to CLI SMIME |
| Wrappers for calls to GPGME SMIME | Wrappers for calls to GPGME SMIME |
| Wrapper around crypto functions | This file dispatches the generic crypto functions to the implemented backend or provides dummy stubs |
| GPGME Key Selection Dialog | The GPGME Key Selection Dialog lets the user select a PGP key |
| PGP Key Selection Dialog | The PGP Key Selection Dialog lets the user select a PGP key |
| SMIME Key Selection Dialog | The SMIME Key Selection Dialog lets the user select a SMIME key |
| Parse the output of CLI PGP program | Parse the output of CLI PGP program |
| Gpgme functions | Gpgme functions |
| PGP sign, encrypt, check routines | Code to sign, encrypt, verify and decrypt PGP messages |
| Pgp functions | Pgp functions |
| Wrapper around calls to external PGP program | This file contains the new pgp invocation code |
| PGP key management routines | PGP key management routines |
| Misc PGP helper routines | Misc PGP helper routines |
| Identify the hash algorithm from a PGP signature | Identify the Message Integrity Check algorithm (micalg) from a PGP signature |
| Parse PGP data packets | Parse PGP data packets |
| SMIME helper routines | SMIME helper routines |
| Smime functions | Smime functions |
| ►Nntp | Usenet network mailbox type; talk to an NNTP server |
| Nntp-specific Account data | Nntp-specific Account data |
| Browse NNTP groups | Browse NNTP groups |
| Auto-complete NNTP newsgroups | Auto-complete NNTP newsgroups |
| Config used by libnntp | Config used by libnntp |
| Nntp-specific Email data | Nntp-specific Email data |
| Nntp-specific Mailbox data | Nntp-specific Mailbox data |
| Read/write a file of subscribed newsgroups | Read/parse/write an NNTP config file of subscribed newsgroups |
| Talk to an NNTP server | Usenet network mailbox type; talk to an NNTP server |
| ►Notmuch | Notmuch virtual mailbox type |
| Notmuch-specific Account data | Notmuch-specific Account data |
| Config used by libnotmuch | Config used by libnotmuch |
| Notmuch database handling | Notmuch database handling |
| Notmuch-specific Email data | Notmuch-specific Email data |
| Notmuch-specific Mailbox data | Notmuch-specific Mailbox data |
| Notmuch virtual mailbox type | Notmuch virtual mailbox type |
| Notmuch query functions | Notmuch query functions |
| Notmuch tag functions | Notmuch tag functions |
| ►Pager | Display contents of an email or help |
| Config used by libpager | Config used by libpager |
| Pager Display | Parse and Display pager data |
| Pager Dialog | The Pager Dialog displays some text to the user that can be paged through |
| Simple Pager Dialog | The Simple Pager Dialog displays text to the user that can be paged |
| Pager functions | Pager functions |
| Process a message for display in the pager | Process a message for display in the pager |
| Pager Window | The Pager Window displays an email to the user |
| Pager Bar | The Pager Bar Window displays status info about the email |
| Pager Panel | The Pager Panel is a non-interactive container around the email list and a status bar |
| Private state data for the Pager | Private state data for the Pager |
| ►Text parsing functions | |
| Text parser | Text parser |
| Parse lines from a config file | Parse lines from a runtime configuration (rc) file |
| Parse the 'set' command | Parse the 'set' command |
| ►Pattern | Match patterns to emails |
| Compile a Pattern | Compile a Pattern |
| Config used by libpattern | Config used by libpattern |
| Pattern Selection Dialog | The Pattern Selection Dialog lets the user select a pattern |
| Execute a Pattern | Execute a Pattern |
| Pattern definitions | Pattern definitions |
| Pattern functions | Pattern functions |
| Pattern handling for messages | Pattern handling for messages |
| Match patterns to emails | Match patterns to emails |
| ►Pop | POP network mailbox |
| Pop-specific Account data | Pop-specific Account data |
| POP authentication | POP authentication |
| Config used by libpop | Config used by libpop |
| Pop-specific Email data | Pop-specific Email data |
| POP helper routines | POP helper routines |
| POP network mailbox | POP network mailbox |
| ►Postponed Emails | Postponed Emails |
| Postponed Email Selection Dialog | The Postponed Email Selection Dialog lets the user set a postponed (draft) email |
| Postponed Emails Functions | Postponed Emails Functions |
| Postponed Email | Functions to deal with Postponed Emails |
| ►Progress | Progress Bar |
| Progress Bar | This is a wrapper around the Progress Bar Window |
| Progress Bar Window Data | Progress Bar Window Data |
| Progress Bar Window | Progress Bar Window |
| ►Question | Ask the user a question |
| Ask the user a question | Ask the user a question |
| ►Send | Shared code for sending Emails |
| Write a MIME Email to a file | Write a MIME Email Body to a file |
| Config used by libsend | Config used by libsend |
| Write a MIME Email Header to a file | Write a MIME Email Header to a file |
| Manipulate multipart Emails | Manipulate multipart Emails |
| Prepare and send an email | Prepare and send an email |
| Miscellaneous functions for sending an email | Miscellaneous functions for sending an email |
| Send email using sendmail | Send email using sendmail |
| Send email to an SMTP server | Send email to an SMTP server |
| ►Sidebar | Display the mailboxes in a side panel |
| Sidebar commands | Sidebar commands |
| Config used by libsidebar | Config used by libsidebar |
| Sidebar functions | Sidebar functions |
| Sidebar observers | Sidebar observers |
| GUI display the mailboxes in a side panel | GUI display the mailboxes in a side panel |
| Sidebar sort functions | Sidebar sort functions |
| Sidebar Window data | Sidebar Window data |
| Sidebar Window | The Sidebar Window is an interactive window that displays a list of mailboxes to the user |
| ►Store | Key value store |
| Shared store code | Shared store code |
| Berkeley DB (BDB) | Berkeley DB backend for the key/value Store |
| GNU dbm (GDBM) | GNU dbm backend for the key/value Store |
| Kyoto Cabinet | Kyoto Cabinet backend for the key/value Store |
| Lightning Memory-Mapped Database (LMDB) | Lightning Memory-Mapped Database (LMDB) backend for the key/value Store |
| Quick Database Manager (QDBM) | Quick Database Manager (QDBM) backend for the key/value Store |
| RocksDB | Use the RocksDB - A persistent key-value store for fast storage environments https://rocksdb.org/ |
| Tokyo Cabinet | Tokyo Cabinet backend for the key/value Store |
| Trivial DataBase (TDB) | Trivial DataBase (TDB) backend for the key/value Store |
