Mutt 1.5.20 on Mac OS X snow leopard.

$ wget ftp://ftp.mutt.org/mutt/devel/mutt-1.5.20.tar.gz

$ tar -xzvf mutt-1.5.20.tar.gz

$ cd mutt-1.5.20

Download and apply sidebar patch

$ curl -O http://lunar-linux.org/~tchan/mutt/patch-1.5.20.sidebar.20090619.txt

$ patch -p1 < patch-1.5.20.sidebar.20090619.txt

Build mutt :

$ ./configure --prefix=/opt/local/ --with-curses --with-regex --enable-locales-fix --enable-pop --enable-imap --enable-smtp --enable-hcache --with-ssl --mandir=/opt/local/

$ make

$ sudo make install

set realname="Julien Vehent"
set from="julienv@example.com"
set use_from="yes"

set sendmail="/opt/local/bin/esmtp -v -X ~/.esmtp/log-`date +%F`"
set envelope_from="yes"

ignore *
unignore Date: From: To: \
         Cc: Reply-To: Subject: Mail-Followup-To:
hdr_order Date: From: To: \
        Cc: Reply-To: Subject: Mail-Followup-To:
set editor="vim" 
set edit_headers=no
set include=yes
set markers=no
set fast_reply=yes
set pager_index_lines=20
set pager_context=1
set menu_scroll

# sidebar =====
set sidebar_width=30
set sidebar_visible=yes
# ctrl-n, ctrl-p to select next, prev folder
# ctrl-o to open selected folder
bind index \CP sidebar-prev
bind index \CN sidebar-next
bind index \CO sidebar-open
bind pager \CP sidebar-prev
bind pager \CN sidebar-next
bind pager \CO sidebar-open
color sidebar_new black red 

set folder="imaps://julienv@mail1.example.com"
set spoolfile="imaps://julienv@mail1.example.com/INBOX"
set mbox="!"
set sort=threads
set sort_browser=reverse-date
set sort_aux=last-date-received
set record="=INBOX.Sent Messages"
set postponed="=INBOX.Drafts"
#set trash="=INBOX.Deleted Messages"
unset imap_passive
set imap_check_subscribed
set mail_check=60
set timeout=30
set header_cache = "~/.mutt/mail/imap-aweber-cache"
set net_inc=5
set message_cachedir = "~/.mutt/mail/imap-aweber-message"

# =====================================================================
# Normal colors
# =====================================================================
color normal white black
color message white black
color hdrdefault cyan black
color attachment yellow black 
#
#
# =====================================================================
# Index
# =====================================================================
#
# Messages already replied to in cyan
color index cyan black "~Q"
#
# Unread messages in yellow
color index brightyellow black "~N"
color index brightyellow black "~O"
#
# Deleted messages in a dark color
color index blue black "~D"
#
# Flagged messages in red
color index brightred black "~F"
#
#
# =====================================================================
# Header
# =====================================================================
#
# Color information about the sender
color header brightcyan black "From: "
color header brightcyan black "Subject: "
color header brightcyan black "date: "
#
#
# =====================================================================
# Body
# =====================================================================
#
# Color the first levels of quoted text
color quoted green black
color quoted1 cyan black
color quoted2 green black
color quoted3 cyan black
#
#
# GnuPG output
#
# Make if very obvious there is a bad signature!
color body black red "BAD signature .*$"
#
# Tag a good signature
color body brightgreen black "Good signature .*$"
#
# Inform the signature can't be verified
color body brightred black "Can't check signature: public key not found"
color body brightred black "WARNING: .*!"
color body brightred black "some signal caught ... exiting"

To send email, mutt can use esmtp with the following ~/.esmtprc file.

identity julienv@example.com
    hostname mail1.example.com:1337
    username "julienv"
    password "turlututu"

If your server uses SSL or TLS on smtp connection, put the certificate in ~/.authenticate/ca.pem

$ openssl s_client -connect mail1.example.com:993

[...]

CONNECTED(00000003)
depth=1 /C=US/O=GeoTrust, Inc./CN=GeoTrust SSL CA
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
 0 s:/serialNumber=PNkItnJ-soLix4bzCWfM9CPp08oAEgmf/C=US/ST=Pennsylvania/L=Huntingdon Valley/O=AWeber Systems, Inc./CN=*.aweber.com
   i:/C=US/O=GeoTrust, Inc./CN=GeoTrust SSL CA
 1 s:/C=US/O=GeoTrust, Inc./CN=GeoTrust SSL CA
   i:/C=US/O=GeoTrust Inc./CN=GeoTrust Global CA
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=/serialNumber=PNkItnJ-soLix4bzCWfM9CPp08oAEgmf/C=US/ST=Pennsylvania/L=Huntingdon Valley/O=AWeber Systems, Inc./CN=*.aweber.com
issuer=/C=US/O=GeoTrust, Inc./CN=GeoTrust SSL CA

Take the b64 section and store it in ~/.authenticate/ca.pem:

$ cat .authenticate/ca.pem
 
-----BEGIN CERTIFICATE-----
MIIEizCCA3OgAwIBAgIDAIHkMA0GCSqGSIb3DQEBBQUAMEAxCzAJBgNVBAYTAlVT
MRcwFQYDVQQKEw5HZW9UcnVzdCwgSW5jLjEYMBYGA1UEAxMPR2VvVHJ1c3QgU1NM
IENBMB4XDTExMDQwMjIxNTU1MloXDTEyMDQwNTAyMTUzNVowgaExKTAnBgNVBAUT
IFBOa0l0bkotc29MaXg0YnpDV2ZNOUNQcDA4b0FFZ21mMQswCQYDVQQGEwJVUzEV
MBMGA1UECBMMUGVubnN5bHZhbmlhMRowGAYDVQQHExFIdW50aW5nZG9uIFZhbGxl
eTEdMBsGA1UEChMUQVdlYmVyIFN5c3RlbXMsIEluYy4xFTATBgNVBAMMDCouYXdl
YmVyLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANOkh7WqBXQ9
o9Urj37bkGhScVo5+QKaugnw9takHUpcWcOXg/wGT268vQbPV1BcejkgX3k4ziDz
Fq8PEaFE20VS0193YNBBRdHu3GROSZX5L4YKX5mHSscp3e7m7Bkrcv35opK/MURW
Gda5AUqgzvFjciKcyuTeh2StCfzRjAB8A3ZPNEHc16t3c2SiBmeVyzRA+wTjdbpT
puso9V4fW8MG9+U+5Iv4X3S8o7VfQBkSatZ+zKDlZnMjYxkwsSubLxIEr2ZKfylQ
Owv/48m+4kKqnq2jYp2PcCkFDR/352uYuG+W8aaYQydvs8S6YHjWvr7Ak6F7bcOR
Sam4r1W8vdcCAwEAAaOCASowggEmMB8GA1UdIwQYMBaAFEJ5VBthzVUrPmPVPEhX
9Z/7Rc5KMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB
BQUHAwIwIwYDVR0RBBwwGoIMKi5hd2ViZXIuY29tggphd2ViZXIuY29tMD0GA1Ud
HwQ2MDQwMqAwoC6GLGh0dHA6Ly9ndHNzbC1jcmwuZ2VvdHJ1c3QuY29tL2NybHMv
Z3Rzc2wuY3JsMB0GA1UdDgQWBBQ3RR5Lh2K/aOOB/3pmDXrxE66kXjAMBgNVHRMB
Af8EAjAAMEMGCCsGAQUFBwEBBDcwNTAzBggrBgEFBQcwAoYnaHR0cDovL2d0c3Ns
LWFpYS5nZW90cnVzdC5jb20vZ3Rzc2wuY3J0MA0GCSqGSIb3DQEBBQUAA4IBAQBp
wYnZLVyYSO16ivx5z3tjs8QwOAEpbujIS/91U7ubveUbbJf7V7BmKBSYtFzUVuW6
ua3Z7yUkVuBp9kbYt2/7eScOGWFsu4EJquTrBKuWi/sHA4pOqFi+XlbZBKaSRNB4
QAfJvjIXgo0uydapTKZRZJR8OgxJWJN5UaqRjLXI+KfGiP2i53EueDNuPn3BMiGZ
D3c6EyEVaAQmjLmK+yALBXDfm/Q3yWgfZ455WHMTapu9Tvfw/elpE1BQ/dgZf5g5
wNlEZUAhkj79nnQsP4Sgxe8+mgH9Um+/e53hr7q8RuJ2Vw85n+dFsNEh7fuazLxS
oGMKDOkBMpESzCCiaJcV
-----END CERTIFICATE-----