assume that, you have a pop3 email address saved on your outlook or other mail clients, if you changed your user information in account setting like the following attachment you can send [email protected] email. my mail service is postfix and i set all the sender and recipient restriction such as reject_unlisted account or reject non fqdn domains or hostname but it's not worked! how you fix this problem in your enterprise mail services? thanks
Also this is all my configuration on main.cf :
readme_directory = /usr/share/doc/postfix-2.11.5/README_FILES virtual_mailbox_domains = $virtual_mailbox_maps, hash:/var/spool/postfix/plesk/virtual_domains virtual_alias_maps = $virtual_maps, hash:/var/spool/postfix/plesk/virtual virtual_mailbox_maps = , hash:/var/spool/postfix/plesk/vmailbox transport_maps = , hash:/var/spool/postfix/plesk/transport smtpd_tls_cert_file = /etc/postfix/postfix_default.pem smtpd_tls_key_file = $smtpd_tls_cert_file smtpd_tls_security_level = may smtpd_use_tls = yes smtp_tls_security_level = may smtp_use_tls = no smtpd_timeout = 3600s smtpd_proxy_timeout = 3600s disable_vrfy_command = yes mynetworks = , hash:/var/spool/postfix/plesk-pop/poplock smtpd_sender_restrictions = reject_unknown_sender_domain,reject_unauthenticated_sender_login_mismatch,reject_known_sender_login_mismatch,hash:/var/spool/postfix/plesk/blacklists, permit_sasl_authenticated, check_client_access, pcre:/var/spool/postfix/plesk/non_auth.re, check_sender_access hash:/var/spool/postfix/plesk/blacklists smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated smtp_send_xforward_command = yes smtpd_authorized_xforward_hosts = 127.0.0.0/8 [::1]/128 smtpd_sasl_auth_enable = yes smtpd_relay_restrictions =permit_mynetworks, permit_sasl_authenticated, defer_unauth_destination, reject_unlisted_sender smtpd_recipient_restrictions = reject_unknown_sender_domain,reject_non_fqdn_sender,permit_mynetworks,permit_sasl_authenticated, reject_unauth_destination, reject_unauth_destination, defer_unauth_destination,reject_unverified_recipient,reject_unknown_recipient_domain virtual_mailbox_base = /var/qmail/mailnames virtual_uid_maps = static:30 virtual_gid_maps = static:31 smtpd_milters = , inet:127.0.0.1:12768 non_smtpd_milters = sender_dependent_default_transport_maps = hash:/var/spool/postfix/plesk/sdd_transport_maps virtual_transport = plesk_virtual plesk_virtual_destination_recipient_limit = 1 mailman_destination_recipient_limit = 1 mailbox_size_limit = 0 virtual_mailbox_limit = 0 myhostname = host.com smtpd_tls_mandatory_protocols = TLSv1 TLSv1.1 TLSv1.2 smtpd_tls_protocols = TLSv1 TLSv1.1 TLSv1.2 smtpd_tls_ciphers = medium smtpd_tls_mandatory_ciphers = medium tls_medium_cipherlist = HIGH:!aNULL:!MD5 message_size_limit = 102400000 smtpd_sasl_authenticated_header = yes disable_vrfy_command = yes smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = no smtpd_sasl_security_options = noanonymous but the problem is until exists.
