Hello,
We are running 2.9.4 on CentOS 6.5 as a mail gateway.
A mail admin of a cooperating entity has reported that their sender
checking to our org produces a protocol error and after that their
system marks our mail as junk.
Here is a session they provided (I only changed the mail adress username
with "existing_user"):
220-mailgw1.noa.gr ESMTP NOA Mail Srv XAPITI XPICTOY
HELO lala
250 mailgw1.noa.gr
MAIL From:<>
250 2.1.0 Ok
RCPT To:<existing_u...@noa.gr>
550 5.5.1 Protocol error
Can you please guide me on what is the suggested course of action to
resolve this?
The config follows:
[root@mailgw1 ~]# postconf -n
allowed_list1 = check_client_access cidr:/etc/postfix/vmail.cidr,reject
allowed_list2 = check_client_access
cidr:/etc/postfix/internalnetworks.cidr,reject
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
xxgdb $daemon_directory/$process_name $process_id & sleep 5
default_process_limit = 50
disable_vrfy_command = yes
enable_long_queue_ids = yes
html_directory = no
inet_interfaces = all
inet_protocols = ipv4, ipv6
local_recipient_maps =
local_transport = error:local mail delivery is disabled
mail_name = NOA Mail Srv XAPITI XPICTOY
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 15728640
mydestination =
mynetworks = 127.0.0.1/32 [::1]/128
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
postscreen_dnsbl_action = enforce
postscreen_dnsbl_sites = b.barracudacentral.org*2, zen.spamhaus.org*2,
psbl.surriel.com*2
postscreen_dnsbl_threshold = 2
postscreen_greet_action = enforce
queue_directory = /var/spool/postfix
relay_domains = noa.gr, astro.noa.gr, admin.noa.gr, nestor.noa.gr
space.noa.gr, meteo.noa.gr, gein.noa.gr, technet.noa.gr
relay_recipient_maps =
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_recipient_restrictions = check_client_access
hash:/etc/postfix/amavis_bypass check_sender_access
hash:/etc/postfix/blacklisted_senders reject_unverified_recipient
reject_unauth_destination check_recipient_access
hash:/etc/postfix/protected_destinations permit_mynetworks
reject_invalid_hostname reject_unauth_pipelining reject_non_fqdn_sender
reject_unknown_sender_domain reject_non_fqdn_recipient
reject_unknown_recipient_domain reject_rbl_client b.barracudacentral.org
reject_rbl_client zen.spamhaus.org reject_rbl_client psbl.surriel.com
reject_rhsbl_client dbl.spamhaus.org reject_rhsbl_sender
dbl.spamhaus.org reject_rhsbl_helo dbl.spamhaus.org check_policy_service
unix:postgrey/socket permit
smtpd_restriction_classes = allowed_list1,allowed_list2
transport_maps = hash:/etc/postfix/transportmap
unknown_local_recipient_reject_code = 550
unverified_sender_reject_code = 550
virtual_alias_maps = hash:/etc/postfix/virtualmap
Thanks in advance,
Nick
