.muttrc

set realname = "Ndimby ANDRIANTSOAVINA"
set from = "ndimby.andriantsoavina@auf.org"
#set alternates = "(ndimby@refer.sn)|(mike.andrian@gmail.com)"

# imap
set imap_login=ndimby.andriantsoavina@auf.org
#set imap_login=ndimby@refer.sn
set imap_pass=**********
set folder=imaps://ndimby.andriantsoavina\@auf.org@imap.sn.auf.org/
#set folder=imaps://ndimby@imap.sn.auf.org
set spoolfile= =INBOX
set record= =Sent/`date +"%Y"`
set imap_keepalive = 900
# Reduce polling frequency to a sane level
set mail_check=90
# And poll the current mailbox more often
set timeout=15
set trash="=Trash"
folder-hook "=Trash" unset trash
# Automatically poll subscribed mailboxes for new mail
set imap_check_subscribed


# un peu de cache
set header_cache =~/.mutt/cache/headers
set message_cachedir =~/.mutt/cache/bodies

# smtp
set smtp_url=smtp://ndimby.andriantsoavina\@auf.org@smtp.sn.auf.org:587/
#set smtp_url=smtp://ndimby@smtp.sn.auf.org:587
set smtp_pass = "***************"

set locale="fr_FR.UTF8"
set date_format="%d %B %Y à %Hh%M"
folder-hook . set sort=threads
folder-hook . set signature="~/signature"
folder-hook . 'set attribution="Le %d, %n a écrit :"'
folder-hook . my_hdr From: ndimby.andriantsoavina@auf.org (ndimby.andriantsoavina)
folder-hook . my_hdr Organization: Agence universitaire de la Francophonie (AUF)
# Set and source our alias file
set alias_file=~/.mutt-aliases
set sort_alias=alias

source ~/.mutt-aliases
#source ~/.mutt-aliases_tb

# pas de confirmations quand ca fait chier
set confirmappend=no  # (Append messages to other mailboxes automatically)
set move=no
set delete=yes

# Consultation des messages
# Utiliser le visualisateur interne pour consulter les messages
set visual = builtin
# Ne pas passer au message suivant lorsqu'on atteint la fin du courant
set pager_stop = yes
set smart_wrap = yes
# Nombre de lignes de contexte à conserver lors d'un saut de page
set pager_context = 3
# Symbole de citation
set quote_regexp = "^([ \t]*[|>/])+"
set markers = no

# Documents attachés
set attach_format = "%u%D%I %t%4n %T%.40d%> [%.7m/%.10M, %.6e%?C?, %C?, %s] "
set attach_sep = "\n"
set attach_split = yes

# boites ou arrivent de nouveaux mails
mailboxes !

# editeur
set editor="vim +':set textwidth=77' +':set wrap' +\`awk '/^$/ {print i+2; exit} {i++}' %s\` %s" 
# Automatically begin editing messages
#set autoedit=yes
# Automatically quote message
set include=yes
set indent_str="> "
set edit_headers

set allow_8bit
set locale="fr_FR.UTF-8"
set charset="utf-8"
set send_charset="utf-8:iso-8859-2:iso-8859-1:us-ascii"


# entete
ignore *
unignore from date subject to cc
unignore organization organisation x-mailer: x-newsreader: x-mailing-list:
unignore posted-to:
hdr_order From: Date: From: To: Cc: Subject:

# couleurs, etc

color hdrdefault black        cyan
color quoted     red          white
color signature  black  white
color indicator  brightwhite  red
color attachment black        green
color error      red          white
color message    blue         white
color search     brightwhite  magenta
color status     brightyellow blue
color tree       red          white
color normal     blue         white
color tilde      green        white
color bold       brightyellow white
color markers    red          white

mono bold      bold
mono underline underline
mono indicator reverse

color header brightwhite cyan "^(From|Subject):"
color header red         cyan "^X-Junked-Because:"
mono  header bold             "^(From|Subject|X-Junked-Because):"

color index brightblue  white  ~N

color index brightwhite yellow ~F
color index black       green  ~T
color index brightwhite black  ~D
mono  index bold               ~N
mono  index bold               ~F
mono  index bold               ~T
mono  index bold               ~D

# Mise en exergue d'éléments dans le corps du message
# URLs
color body brightblue  white "(http|https|ftp|news|telnet|finger)://[^ \">\t\r\n]*"
color body brightblue  white "mailto:[-a-z_0-9.]+@[-a-z_0-9.]+"
color body brightblue  white "news:[^ \">\t\r\n]*"
mono  body bold              "(http|https|ftp|news|telnet|finger)://[^ \">\t\r\n]*"
mono  body bold              "mailto:[-a-z_0-9.]+@[-a-z_0-9.]+"
mono  body bold              "news:[^ \">\t\r\n]*"
# Adresses email
color body brightblue  white "[-a-z_0-9.%$]+@[-a-z_0-9.]+\\.[-a-z][-a-z]+"
mono  body bold              "[-a-z_0-9.%$]+@[-a-z_0-9.]+\\.[-a-z][-a-z]+"

# Smileys
color body brightgreen white " [;:]-*[\)>\(<|]"
color body brightgreen white " [\(\|\)]*c[:;=]"

# Texte « en gras » (i.e. *gras*)
color body brightblue  white "(^|[^[:alnum:][:punct:]])\\*[[:alnum:][:punct:]]+\\*([^[:alnum:][:punct:]]|$)"

# Texte « en italique » (i.e. /italique/)
color body brightblue  white "(^|[^[:alnum:][:punct:]])/[[:alnum:][:punct:]]+/([^[:alnum:][:punct:]]|$)"

# Texte « souligné » (i.e. _souligné_)
color body brightblue  white "(^|[^[:alnum:][:punct:]])_[[:alnum:][:punct:]]+_([^[:alnum:][:punct:]]|$)"

Merci j'ai utilisé ces lignes et arrive à envoyer les mails encore une fois merci DoanManhHa