From: Robert Adkins (radkinsimpelind.com)
Date: Wed Nov 01 2006 - 16:47:28 CST

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1. I have set my email client to only send plaint-text emails to
postfix.org. I do attempt to remember to add mailing lists to that
filter, unfortunately being human, I sometimes forget to do so. I
apologize for the error on my part.

I used the example (see below) from the Restriction_Class_Readme from
the postfix.org website:

/etc/postfix/main.cf:
    smtpd_recipient_restrictions =
        check_sender_access hash:/etc/postfix/restricted_senders
        ...other stuff...

    smtpd_restriction_classes = local_only
    local_only =
        check_recipient_access hash:/etc/postfix/local_domains, reject

/etc/postfix/restricted_senders:
    foodomain local_only
    bardomain local_only

/etc/postfix/local_domains:
    this.domain OK matches this.domain and subdomains
    that.domain OK matches that.domain and subdomains

    After creating a test user account, adding that user to the
restricted_senders and creating the local_domains file and then running
portmap on both files to create the .db files. I restarted the postfix
daemon and nothing changed.

    The test user can still send and receive email from outside of the
domain.

 From 'postconf -n' :

alias_maps = hash:/etc/aliases
biff = no
canonical_maps = hash:/etc/postfix/canonical
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
debug_peer_level = 2
defer_transports =
disable_dns_lookups = no
home_mailbox = Maildir/
html_directory = /usr/share/doc/packages/postfix/html
mailbox_size_limit = 0
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains =
masquerade_exceptions = root
message_size_limit = 30720000
mydestination = $myhostname, localhost.$mydomain, impelind.com
myhostname = impelind.com
myorigin = impelind.com
newaliases_path = /usr/bin/newaliases
readme_directory = /usr/share/doc/packages/postfix/README_FILES
recipient_bcc_maps = hash:/etc/postfix/duper_bcc
relocated_maps = hash:/etc/postfix/relocated
sample_directory = /usr/share/doc/packages/postfix/samples
sender_bcc_maps = hash:/etc/postfix/duper_bcc
sender_canonical_maps = hash:/etc/postfix/sender_canonical
sendmail_path = /usr/sbin/sendmail
setgid_group = maildrop
smtp_sasl_auth_enable = no
smtp_use_tls = no
smtpd_client_restrictions =
smtpd_helo_required = no
smtpd_helo_restrictions =
smtpd_recipient_restrictions =
permit_mynetworks,reject_unauth_destination, check_sender_access
hash:/etc/postfix/restricted_senders
smtpd_restriction_classes = local_only
smtpd_sasl_auth_enable = no
smtpd_sender_restrictions = hash:/etc/postfix/access
smtpd_use_tls = no
strict_rfc821_envelopes = no
transport_maps = hash:/etc/postfix/transport
unknown_local_recipient_reject_code = 550

    Thank you,
    Robert Adkins

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