.muttrc

# Default shared configuration

# Email accounts configuration
source ~/.mutt/accounts

# Authenticators for macOS
set smtp_authenticators = 'gssapi:login'

# Configuration for email formats (HTML, etc) 
#if there is only html dump that 
auto_view text/html 
# this helps with multipart messages 
alternative_order text/plain text/enriched text/html 
set mailcap_path = ~/.mutt/mailcap 

# Caching setup
set header_cache = "~/.mutt/cache/headers"
set message_cachedir = "~/.mutt/cache/bodies"
set certificate_file = "~/.mutt/certificates"

# Content setup (needs vim to be on board)
set text_flowed
set editor=vim

# Charset configuration 
set assumed_charset="utf-8:iso-8859-1:us-ascii" 
set charset="utf-8" 
set config_charset="utf-8" 
set send_charset="utf-8:iso-8859-1:us-ascii" 
set ascii_chars 
 
# Message sorting options 
# set sort = threads 
set mark_old = no 
set sort=reverse-threads
set sort_aux=date-received

# User interface configuration
set sidebar_visible = yes
set sidebar_format = "%B%?F? [%F]?%* %?N?%N/?%S"
set sidebar_sort_method = alpha
set mail_check_stats
# Show message list after opening message
set pager_index_lines=10
# Navigate sidebar with control + P, N, O
bind index,pager \CP sidebar-prev
bind index,pager \CN sidebar-next
bind index,pager \CO sidebar-open
# Toggle sidebar visibiity
bind index,pager \CB sidebar-toggle-visible

# activate TLS if available on the server 
set ssl_starttls=yes 
# always use SSL when connecting to a server 
set ssl_force_tls=yes 

# Don't wait to enter mailbox manually  
unset imap_passive         
# List subscribed mailboxes
#set imap_list_subscribed
# Automatically poll subscribed mailboxes for new mail (new in 1.5.11) 
set imap_check_subscribed 
# Reduce polling frequency to a sane level 
set mail_check=60 
# And poll the current mailbox more often (not needed with IDLE in post 1.5.11) 
set timeout=10

# Colors
color normal white default
color attachment brightyellow default
color hdrdefault cyan default
color indicator black cyan
color markers brightred default
color quoted  brightcyan default
color signature cyan default
color status  brightgreen blue
color tilde blue default
color tree  red default

color index red default ~P
color index brightred default ~D
color index magenta default ~T

color header brightgreen default ^From:
color header brightcyan default ^To:
color header brightcyan default ^Reply-To:
color header brightcyan default ^Cc:
color header brightblue default ^Subject:

# identifies email addresses
color body  brightgreen default [\-\.+_a-zA-Z0-9]+@[\-\.a-zA-Z0-9]+

# identifies URLs
color body  brightblue default (https?|ftp)://[\-\.,/%~_:?&=\#a-zA-Z0-9]+

# GnuPG
color body black red "BAD signature .*$"

# Tag a good signature
color body brightgreen default "Good signature .*$"

# Inform the signature can't be verified
color body brightred default "Can't check signature: public key not found"
color body brightred default "WARNING: .*!"
color body brightred default "some signal caught ... exiting"

# Prevent backspace from aborting prompt
set abort_backspace = no

# https://dev.mutt.org/trac/wiki/UseCases/Gmail
# https://www.neomutt.org/feature/sidebar-intro
# https://unix.stackexchange.com/questions/50476/sorting-threads-in-mutt
# http://www.mdlerch.com/emailing-mutt-and-vim-advanced-config.html
# https://superuser.com/questions/273826/why-my-mutt-black-background-looks-gray