450 4.7.1 Client host rejected: cannot find your hostname

## General Postfix configuration
# should be the default domain from your provider eg. "server100.provider.tld"
mydomain = v220100556153214.yourvserver.net




# should be different from $mydomain eg. "mail.$mydomain"
myhostname = mail.$mydomain




mydestination = $myhostname,
	$mydomain,
	localhost.$myhostname,
	localhost.$mydomain,
	localhost
mynetworks = 127.0.0.0/8
inet_interfaces = all
append_dot_mydomain = no
biff = no




# Postfix performance settings
default_destination_concurrency_limit = 20
local_destination_concurrency_limit = 2




# SMTPD Settings
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_helo_required = yes
smtpd_recipient_restrictions = permit_mynetworks,
	permit_sasl_authenticated,
	reject_unauth_destination,
	reject_unauth_pipelining,
	reject_non_fqdn_recipient
smtpd_sender_restrictions = permit_mynetworks,
	reject_sender_login_mismatch,
	permit_sasl_authenticated, 
	reject_unknown_helo_hostname, 
	reject_unknown_recipient_domain, 
	reject_unknown_sender_domain
smtpd_client_restrictions = permit_mynetworks,
	permit_sasl_authenticated,
	reject_unknown_client_hostname
# Maximum size of Message in bytes (50MB)
message_size_limit = 52428800




## SASL Auth Settings
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes




# Virtual delivery settings
virtual_mailbox_base = /var/customers/mail/
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailbox_maps.cf
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual_mailbox_domains.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_alias_maps.cf
smtpd_sender_login_maps = mysql:/etc/postfix/mysql-virtual_sender_permissions.cf
virtual_uid_maps = static:2000
virtual_gid_maps = static:2000




# Local delivery settings
local_transport = local
alias_maps = $alias_database




# Default Mailbox size, is set to 0 which means unlimited!
mailbox_size_limit = 0
virtual_mailbox_limit = 0




### TLS settings
###
## TLS for outgoing mails from the server to another server
#smtp_tls_security_level = may
#smtp_tls_note_starttls_offer = yes
## TLS for email client
#smtpd_tls_security_level = may
#smtpd_tls_cert_file = /etc/ssl/server/v220100556153214.yourvserver.net.pem
#smtpd_tls_key_file = $smtpd_tls_cert_file
#smtpd_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
#smtpd_tls_loglevel = 1
#smtpd_tls_received_header = yes




debugger_command =
     	PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
     	ddd $daemon_directory/$process_name $process_id & sleep 5

#
# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#           	(yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp  	inet  n   	-   	-   	-   	-   	smtpd
#submission inet n   	-   	-   	-   	-   	smtpd
#  -o smtpd_tls_security_level=encrypt
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
#smtps 	inet  n   	-   	-   	-   	-   	smtpd
#  -o smtpd_tls_wrappermode=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#  -o milter_macro_daemon_name=ORIGINATING
#628   	inet  n   	-   	-   	-   	-   	qmqpd
pickup	fifo  n   	-   	-   	60  	1   	pickup
cleanup   unix  n   	-   	-   	-   	0   	cleanup
qmgr  	fifo  n   	-   	n   	300 	1   	qmgr
#qmgr 	fifo  n   	-   	-   	300 	1   	oqmgr
tlsmgr	unix  -   	-   	-   	1000?   1   	tlsmgr
rewrite   unix  -   	-   	-   	-   	-   	trivial-rewrite
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
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay 	unix  -   	-   	-   	-   	-   	smtp
	-o smtp_fallback_relay=
#   	-o smtp_helo_timeout=5 -o smtp_connect_timeout=5
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
anvil 	unix  -   	-   	-   	-   	1   	anvil
scache	unix  -   	-   	-   	-   	1   	scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent.  See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop  unix  -   	n   	n   	-   	-   	pipe
  flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
#   lmtp	cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
#  mailbox_transport = lmtp:inet:localhost
#  virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus 	unix  -   	n   	n   	-   	-   	pipe
#  user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
# Old example of delivery via Cyrus.
#
#old-cyrus unix  -   	n   	n   	-   	-   	pipe
#  flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp  	unix  -   	n   	n   	-   	-   	pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail	unix  -   	n   	n   	-   	-   	pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp 	unix  -   	n   	n   	-   	-   	pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix	-	n	n	-	2	pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman   unix  -   	n   	n   	-   	-   	pipe
  flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
  ${nexthop} ${user}