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I have a mail server on ubuntu 14.04. The domain is imsp.bj. I was able able to send email between users in the domain. But now it does not work any more. I have this error each time i tried to send the message between the users " status=bounced ( user unknown). Here are my config files

  • Postconf -n

alias_database = hash:/etc/aliases

alias_maps = ldap:/etc/postfix/ldap-aliases.cf

append_dot_mydomain = no

biff = no

config_directory = /etc/postfix

content_filter = smtp-amavis:[127.0.0.1]:10024

inet_interfaces = all

inet_protocols = all

local_recipient_maps =

mailbox_size_limit = 0

mydestination = mail.imsp.bj, localhost.imsp.bj, imsp.bj, localhost

myhostname = mail.imsp.bj

mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128

myorigin = /etc/mailname

readme_directory = no

recipient_delimiter = +

relayhost =

smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)

smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_non_fqdn_recipient reject_unauth_destination reject_rbl_client dul.dnsbl.sorbs.net reject_rbl_client zen.spamhaus.org check_policy_service inet:127.0.0.1:10023

smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination

smtpd_sender_restrictions = permit_sasl_authenticated permit_mynetworks reject_non_fqdn_sender reject_unauth_pipelining reject_unknown_sender_domain

smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem

smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key

smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache

smtpd_use_tls = yes

i'm using Postfix and Cyrus

The users are in the ldap of Samba4 AD

I've been searching but can't find any solution

Any help will be really apprecitated.

Thanks

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