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223 lines
7.4 KiB
Markdown
223 lines
7.4 KiB
Markdown
---
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layout: doc
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title: Mutt
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permalink: /doc/mutt/
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redirect_from:
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- /en/doc/mutt/
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- /doc/Mutt/
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- /wiki/Mutt/
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---
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Mutt
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====
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Mutt is a fast, standards-compliant, efficient MUA (Mail User Agent). In some areas it works better than Thunderbird+Enigmail, and is certainly faster and more responsive.
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Mutt lacks true MTA (Message Transfer Agent aka "SMTP client") and MRA (Mail
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Retrieval Agent aka "IMAP/POP3 client"), thus there are some provisions
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built-in. In principle it is only mail reader and composer. You may install
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true MTA such as [Postfix](/doc/postfix/) or Exim and MRA such as
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[Fetchmail](/doc/fetchmail/). Alternatively you can synchronize your mailbox
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using [OfflineIMAP](https://github.com/OfflineIMAP/offlineimap) and just stick
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to integrated SMTP support. You can even use integrated IMAP client, but it is
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not very convenient.
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Installation
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------------
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`dnf install mutt cyrus-sasl-plain`
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`cyrus-sasl-plain` package is necessary for SMTP authentication to work.
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Configuration
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-------------
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Mutt generally works out of the box. This configuration guide discusses only Qubes-specific setup. In this example we will have one TemplateVM and several AppVMs. It also takes advantage of [SplitGPG](/doc/split-gpg/), which is assumed to be already working.
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**NOTE:** this requires `qubes-gpg-split >= 2.0.9`. 2.0.8 and earlier contains bug which causes this setup to hang in specific situations and does not allow to list keys.
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First, paste this to `/etc/Muttrc.local` in TemplateVM:
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~~~
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# specify your key or override in ~/.mutt/muttrc in AppVM
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set pgp_sign_as="0xDEADBEEF"
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set pgp_use_gpg_agent = no
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# this needs qubes-gpg-split >= 2.0.8; 2.0.7 end earlier has had a deadlock on this
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set pgp_decode_command="qubes-gpg-client-wrapper --status-fd=2 --batch %f"
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#set pgp_decode_command="gpg --status-fd=2 %?p?--passphrase-fd=0? --no-verbose --quiet --batch --output - %f"
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set pgp_decrypt_command="$pgp_decode_command"
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set pgp_verify_command="qubes-gpg-client-wrapper --status-fd=2 --no-verbose --quiet --batch --output - --verify %s %f"
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set pgp_sign_command="qubes-gpg-client-wrapper --batch --armor --detach-sign --textmode %?a?-u %a? %f"
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set pgp_clearsign_command="qubes-gpg-client-wrapper --batch --armor --textmode --clearsign %?a?-u %a? %f"
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# I found no option to add Charset armor header when it is UTF-8, since this is
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# default (as specified in RFC4880). This is needed to workaround bug in
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# Enigmail, which ignores RFC and without this header Thunderbird interprets
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# plaintext as us-ascii. See https://sourceforge.net/p/enigmail/bugs/38/.
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### also note you must specify absolute path of pgpewrap when using debian
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### e.g. /usr/lib/mutt/pgpewrap
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set pgp_encrypt_only_command="pgpewrap qubes-gpg-client-wrapper --batch --textmode --armor --always-trust %?a?--encrypt-to %a? --encrypt -- -r %r -- %f | sed -e '2iCharset: UTF-8'"
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set pgp_encrypt_sign_command="pgpewrap qubes-gpg-client-wrapper --batch --textmode --armor --always-trust %?a?--encrypt-to %a? --encrypt --sign %?a?-u %a? -- -r %r -- %f | sed -e '2iCharset: UTF-8'"
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# we need to import both into vault and locally wrt $pgp_verify_command
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set pgp_import_command="qubes-gpg-import-key %f; gpg --no-verbose --import %f"
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# those are unsupported by split-gpg
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set pgp_export_command="gpg --no-verbose --export --armor %r"
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set pgp_verify_key_command="gpg --no-verbose --batch --fingerprint --check-sigs %r"
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# read in the public key ring
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set pgp_list_pubring_command="qubes-gpg-client-wrapper --no-verbose --batch --quiet --with-colons --list-keys %r"
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# read in the secret key ring
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set pgp_list_secring_command="qubes-gpg-client-wrapper --no-verbose --batch --quiet --with-colons --list-secret-keys %r"
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# this set the number of seconds to keep in memory the passpharse used to encrypt/sign
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# the more the less secure it will be
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set pgp_timeout=600
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# it's a regexp used against the GPG output: if it matches some line of the output
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# then mutt considers the message a good signed one (ignoring the GPG exit code)
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#set pgp_good_sign="^gpg: Good signature from"
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set pgp_good_sign="^\\[GNUPG:\\] GOODSIG"
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# mutt uses by default PGP/GPG to sign/encrypt messages
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# if you want to use S-mime instead set the smime_is_default variable to yes
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# automatically sign all outcoming messages
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set crypt_autosign=yes
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# sign only replies to signed messages
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#set crypt_replysign
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# automatically encrypt outcoming messages
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#set crypt_autoencrypt=yes
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# encrypt only replies to signed messages
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set crypt_replyencrypt=yes
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# encrypt and sign replies to encrypted messages
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set crypt_replysignencrypted=yes
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# automatically verify the sign of a message when opened
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set crypt_verify_sig=yes
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send-hook "~A" set pgp_autoinline=no crypt_autoencrypt=no
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send-hook "~t @invisiblethingslab\.com" set crypt_autoencrypt=yes
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# vim:ft=muttrc
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~~~
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Then shutdown your TemplateVM. Next open your AppVM, create file `/home/user/.mutt/muttrc` and adjust for your needs:
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~~~
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#
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# accounts
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#
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set from = "Wojciech Zygmunt Porczyk <woju@invisiblethingslab.com>"
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alternates '^woju@invisiblethingslab\.com$'
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alternates '^wojciech@porczyk\.eu$'
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#
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# crypto
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#
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set pgp_sign_as = "0xDEADBEEF"
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send-hook "~t @my\.family\.com" set crypt_autoencrypt=no
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#
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# lists
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#
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# google groups
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lists .*@googlegroups\.com
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subscribe (qubes-(users|devel)|othergroup)@googlegroups\.com
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fcc-save-hook qubes-users@googlegroups\.com =list/qubes-users/
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fcc-save-hook qubes-devel@googlegroups\.com =list/qubes-devel/
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fcc-save-hook othergroup@googlegroups\.com =list/othergroup/
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~~~
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You may also create `/home/user/.signature`:
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~~~
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regards,
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Wojciech Porczyk
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~~~
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Some additional useful settings
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-------------------------------
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In `muttrc`:
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###qubes integration stuff
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#open links in a dispvm using urlview
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#see below for sample .urlview
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macro pager \cb <pipe-entry>'urlview'<enter> 'Follow links with urlview'
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#override default mailcap MIME settings with qvm-open-in-dvm calls
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#see sample .mailcap below
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set mailcap_path=~/.mailcap
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bind attach <return> view-mailcap
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Debian-specific options:
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#use debian mutt-patched package for mailbox sidebar hack
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set sidebar_width = 30
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set sidebar_visible = no
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set sidebar_delim='|'
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#show/hide sidebar
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macro index S '<enter-command>toggle sidebar_visible<enter>'
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macro pager S '<enter-command>toggle sidebar_visible<enter>'
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#navigate the sidebar folders
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bind index CP sidebar-prev
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bind index CN sidebar-next
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bind index CO sidebar-open
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bind pager CP sidebar-prev
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bind pager CN sidebar-next
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In `.urlview`:
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### TODO: this doesn't work with encrypted emails --
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### urlview can't find the links
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###
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COMMAND qvm-open-in-dvm %s
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In `.mailcap`:
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### TODO: override most/all default mailcap settings to prevent
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### opening in muttvm
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### is there a way to do this polymorphically? i.e. not
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### listing every damn mimetype by hand
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###
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### also would be convenient to use mailcap's TEST feature to
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### show some html in mutt pager (e.g. with w3m, links or html2text),
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### else open others in dispvm
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# MS Word documents
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application/msword; qvm-open-in-dvm %s
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application/vnd.oasis.opendocument.spreadsheet; qvm-open-in-dvm %s
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application/vnd.oasis.opendocument.text; qvm-open-in-dvm %s
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# Images
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image/jpg; qvm-open-in-dvm %s
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image/jpeg; qvm-open-in-dvm %s
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image/png; qvm-open-in-dvm %s
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image/gif; qvm-open-in-dvm %s
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# PDFs
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application/pdf; qvm-open-in-dvm %s
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# HTML
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text/html; qvm-open-in-dvm %s
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