example postfix config for sending root server replace #HOSTNAME# with your hostname and #DOMAIN# with your domain. example: hostname = tador.cebe.net domain = cebe.net Also make sure to replace [email protected] with your mail. I do not want to get your cron mails ;-)

main.cf

# /etc/postfix/main.cf

## uncomment these when relaying via mail provider
## the host to relay via. The brackets mean "take the hostname itself, not its MX"
#relayhost = [mala.cebe.net]
## a fallback host to use if relayhost is not available
#smtp_fallback_relay= [hermes.bh-servers.net]

## uncommend these when you need smtp auth for mail provider
## put the following line in /etc/postfix/relay_password:
## relayhost    username:password
#smtp_sasl_password_maps=hash:/etc/postfix/relay_password
#smtp_sasl_auth_enable=yes
#smtp_sasl_security_options = noanonymous


default_database_type         = btree
biff                          = no

append_dot_mydomain           = no
myorigin                      = #HOSTNAME#
mydomain                      = #DOMAIN#
myhostname                    = #HOSTNAME#
mydestination                 = localhost, localhost.$mydomain, #HOSTNAME#
mynetworks                    = 127.0.0.0/8, [::ffff:127.0.0.0]/104, [::1]/128
recipient_delimiter           = +


maximal_queue_lifetime        = 4d
delay_warning_time            = 4h

# these values control how long a mail will stay in the queue. These values play good with greylisting.
minimal_backoff_time          = 3m
maximal_backoff_time          = 30m


# No mailbox limit to avoid conflict with message size
mailbox_size_limit            = 0
virtual_mailbox_limit         = 0
# 100 MB * 1,36 wegen base64 http://de.wikipedia.org/wiki/Base64
message_size_limit            = 142606336
# 1 MB
bounce_size_limit             = 1048576
# 100 KB
header_size_limit             = 102400


alias_maps                    = hash:/etc/aliases
alias_database                = $alias_maps
luser_relay                   = [email protected]

# good for debugging
#always_bcc = [email protected]


# TLS parameters
# make sure cert and key file exist (these are default on debian)
smtp_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtp_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtp_use_tls=yes
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache


# in case we enable smtpd in master.cf, only accept mail from mynetworks (as configured above)
smtpd_recipient_restrictions = permit_mynetworks, defer

master.cf

# /etc/postfix/master.cf
#
# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================

# there is no smtpd here we are only relaying
#smtp      inet  n       -       -       -       -       smtpd

# these are services needed for queue management
pickup    fifo  n       -       -       60      1       pickup
cleanup   unix  n       -       -       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
rewrite   unix  -       -       -       -       -       trivial-rewrite
tlsmgr    unix  -       -       -       1000?   1       tlsmgr

# mail transports, smtp is the only relevant here but we keep others in case we need them
bounce    unix  -       -       -       -       0       bounce
defer     unix  -       -       -       -       0       bounce
trace     unix  -       -       -       -       0       bounce
verify    unix  -       -       -       -       1       verify
flush     unix  n       -       -       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       -       -       -       smtp
relay     unix  -       -       -       -       -       smtp
showq     unix  n       -       -       -       -       showq
error     unix  -       -       -       -       -       error
retry     unix  -       -       -       -       -       error
discard   unix  -       -       -       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       -       -       -       lmtp

# stats and cache processes
anvil     unix  -       -       -       -       1       anvil
scache    unix  -       -       -       -       1       scache