From: Joey (JoeyWeb56.net)
Date: Fri May 02 2008 - 09:17:20 CDT

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Hello All,

I am trying to figure out why this exchange server gets a Helo Check error.

May 2 08:45:19 pluto postfix/smtpd[6099]: NOQUEUE: reject: RCPT from
jupiter.client-server.net[172.51.19.125]:

554 5.7.1 <client-server.com>: Helo command rejected: Helo Check;

from=<Jackclient-server.com> to=<Mackclient-server.com> proto=ESMTP
helo=<client-server.com>

I have these settings which maybe I'm being a little aggressive, but other
Exchange servers are sending fine:

biff = no

soft_bounce = no

smtpd_delay_reject = yes

smtpd_helo_required = yes

strict_rfc821_envelopes = yes

disable_vrfy_command = yes

smtpd_hard_error_limit = 3

smtpd_junk_command_limit = 3

show_user_unknown_table_name = no

unknown_address_reject_code = 554

unknown_hostname_reject_code = 554

unknown_client_reject_code = 554

deliver_lock_attempts = 10

smtpd_recipient_restrictions =

        reject_invalid_helo_hostname,

        reject_non_fqdn_sender,

        reject_non_fqdn_recipient,

        reject_unknown_sender_domain,

        reject_unknown_recipient_domain,

        permit_mynetworks,

        permit_sasl_authenticated,

        reject_unauth_destination,

        check_helo_access hash:/etc/postfix/helo_access,

        reject_invalid_helo_hostname,

        reject_non_fqdn_helo_hostname,

Thanks!

Joey

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