In an attempt to control unsolicited email (spam), some Internet service providers will block port 25. All email sent via the Internet is routed through port 25, the port used for communication between an email client and an email server. Port 25 blocking allows ISPs to block spam sent out through their networks. If you are experiencing technical difficulties when sending via your email client (such as Outlook), then your ISP may block port 25. For these cases, you will need to change the SMTP port from 25 to 587 in your email client.

#
machine  i386
cpu  I686_CPU
ident  NOYAU
 
# To statically compile in device wiring instead of /boot/device.hints
#hints  "GENERIC.hints"  # Default places to look for devices.
 
options  SCHED_4BSD  # 4BSD scheduler
options  INET   # InterNETworking
options  INET6   # IPv6 communications protocols
options  FFS   # Berkeley Fast Filesystem
options  SOFTUPDATES  # Enable FFS soft updates support
options  UFS_ACL   # Support for access control lists
options  UFS_DIRHASH  # Improve performance on big directories
options  MD_ROOT   # MD is a potential root device
options  NFSCLIENT  # Network Filesystem Client
options  NFSSERVER  # Network Filesystem Server
options  NFS_ROOT  # NFS usable as /, requires NFSCLIENT
options  MSDOSFS   # MSDOS Filesystem
options  CD9660   # ISO 9660 Filesystem
options  PROCFS   # Process filesystem (requires PSEUDOFS)
options  PSEUDOFS  # Pseudo-filesystem framework
options  GEOM_GPT  # GUID Partition Tables.
options  COMPAT_43  # Compatible with BSD 4.3 [KEEP THIS!]
options  COMPAT_FREEBSD4  # Compatible with FreeBSD4
options  SCSI_DELAY=15000 # Delay (in ms) before probing SCSI
options  KTRACE   # ktrace(1) support
options  SYSVSHM   # SYSV-style shared memory
options  SYSVMSG   # SYSV-style message queues
options  SYSVSEM   # SYSV-style semaphores
options  _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options  KBD_INSTALL_CDEV # install a CDEV entry in /dev
options  AHC_REG_PRETTY_PRINT # Print register bitfields in debug
     # output.  Adds ~128k to driver.
options  AHD_REG_PRETTY_PRINT # Print register bitfields in debug
     # output.  Adds ~215k to driver.
options  ADAPTIVE_GIANT  # Giant mutex is adaptive.
 
device  apic   # I/O APIC
 
# Bus support.  Do not remove isa, even if you have no isa slots
device  isa
device  eisa
device  pci
 
# Floppy drives
#device  fdc
 
# ATA and ATAPI devices
device  ata
device  atadisk  # ATA disk drives
device  atapicd  # ATAPI CDROM drives
options  ATA_STATIC_ID # Static device numbering
 
# SCSI peripherals
device  scbus  # SCSI bus (required for SCSI)
device  da  # Direct Access (disks)
device  sa  # Sequential Access (tape etc)
 
# atkbdc0 controls both the keyboard and the PS/2 mouse
device  atkbdc  # AT keyboard controller
device  atkbd  # AT keyboard
device  psm  # PS/2 mouse
 
device  vga  # VGA video card driver
 
device  splash  # Splash screen and screen saver support
 
# syscons is the default console driver, resembling an SCO console
device  sc
 
device  agp  # support several AGP chipsets
 
# Floating point support - do not disable.
device  npx
 
# Power management support (see NOTES for more options)
#device  apm
# Add suspend/resume support for the i8254.
device  pmtimer
 
#device  cardbus  # CardBus (32-bit) bus
 
# Serial (COM) ports
device  sio  # 8250, 16[45]50 based serial ports
 
# Parallel port
device  ppc
device  ppbus  # Parallel port bus (required)
device  lpt  # Printer
device  plip  # TCP/IP over parallel
device  ppi  # Parallel port interface device
#device  vpo  # Requires scbus and da
 
# PCI Ethernet NICs that use the common MII bus controller code.
# NOTE: Be sure to keep the 'device miibus' line in order to use these NICs!
device  miibus  # MII bus support
 
# ISA Ethernet NICs.  pccard NICs included.
#device  cs  # Crystal Semiconductor CS89x0 NIC
# 'device ed' requires 'device miibus'
device  ed  # NE[12]000, SMC Ultra, 3c503, DS8390 cards
 
# Pseudo devices.
device  loop  # Network loopback
device  mem  # Memory and kernel memory devices
device  io  # I/O device
device  random  # Entropy device
device  ether  # Ethernet support
device  sl  # Kernel SLIP
device  ppp  # Kernel PPP
device  tun  # Packet tunnel.
device  pty  # Pseudo-ttys (telnet etc)
device  md  # Memory "disks"
device  gif  # IPv6 and IPv4 tunneling
device  faith  # IPv6-to-IPv4 relaying (translation)
 
# The `bpf' device enables the Berkeley Packet Filter.
# Be aware of the administrative consequences of enabling this!
# Note that 'bpf' is required for DHCP.
device  bpf  # Berkeley packet filter
 
# USB support
device  uhci  # UHCI PCI->USB interface
device  ohci  # OHCI PCI->USB interface
device  ehci  # EHCI PCI->USB interface (USB 2.0)
device  usb  # USB Bus (required)
device  udbp  # USB Double Bulk Pipe devices
device  ugen  # Generic
device  uhid  # "Human Interface Devices"
device  ukbd  # Keyboard
device  ulpt  # Printer
device  umass  # Disks/Mass storage - Requires scbus and da
device  ums  # Mouse
#device  urio  # Diamond Rio 500 MP3 player
device  uscanner # Scanners
 
# FireWire support
device  firewire # FireWire bus code
device  sbp  # SCSI over FireWire (Requires scbus and da)

# D'une manière plus souple, cela exécute des commandes du shell et si le  
# résultat donne les noms de ces fichiers, ils sont inclus. Par exemple,
# pour changer de configuration, selon tel périphérique de stockage USB,
# dans ce cas, un lecteur carte intégré :
#d-i preseed/include_command string \
#    if $(grep -q "GUID: 0aec3050aec305000001a003" /proc/scsi/usb-storage-*/*); \
#   then echo kraken.cfg; else echo otherusb.cfg; fi