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Thread: reject email

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  1. #1
    Join Date
    Aug 2013
    Beans
    30

    reject email

    How to reject email with not have reverse dns?

    my postfix conf. is:
    Code:
    smtpd_sasl_auth_enable  = yes
    broken_sasl_auth_clients = yes
    smtpd_sasl_type         = dovecot
    smtpd_sasl_path         = private/auth
    mailbox_transport       = dovecot
    disable_vrfy_command    = yes
    smtpd_delay_reject      = yes
    smtpd_helo_required     = yes
    smtpd_sender_restrictions =
                            permit_sasl_authenticated,
                            permit_mynetworks,
                            reject_non_fqdn_sender,
                            reject_unknown_sender_domain,
                            permit
    
    smtpd_recipient_restrictions =
            permit_sasl_authenticated,
            permit_mynetworks,
            reject_non_fqdn_recipient,
            reject_unknown_recipient_domain,
            reject_unauth_destination,
            reject_unauth_pipelining,
            reject_unknown_reverse_client_hostname

  2. #2
    Join Date
    Nov 2008
    Location
    Metro Boston
    Beans
    8,928
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: reject email

    Try
    Code:
    smtpd_client_restrictions = reject_unknown_reverse_client_hostname
    That's a bit more permissive than "reject_unknown_client_hostname". Details here.
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  3. #3
    Join Date
    Aug 2013
    Beans
    30

    Re: reject email

    Not working.Still receive message wich no have rdns. In postfix a have this config

  4. #4
    Join Date
    Jun 2007
    Location
    Porirua, New Zealand
    Beans
    Hidden!
    Distro
    Ubuntu

    Re: reject email

    Quote Originally Posted by Bondar_Mircea View Post
    Not working.Still receive message wich no have rdns. In postfix a have this config
    Apologies in advance if this is "obvious" but did you remember to restart postfix after updating its config?
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  5. #5
    Join Date
    Aug 2013
    Beans
    30

    Re: reject email

    yes..i restarted postfix..

  6. #6
    Join Date
    Nov 2008
    Location
    Metro Boston
    Beans
    8,928
    Distro
    Kubuntu 14.04 Trusty Tahr

    Re: reject email

    What do you see in mail.log? When my server encounters senders with IPs that have no reverse resolution, I get an entry like this:

    Code:
    Oct  7 09:41:32 Pikachu postfix/smtpd[11738]: NOQUEUE: reject: CONNECT from unknown[66.35.68.70]: 450 4.7.1 Client host rejected: cannot find your hostname, [66.35.68.70]; proto=SMTP
    If you ask for help, please have the courtesy to check for responses and thank the people who helped you.

    Blog · Linode System Administration Guides · Android Apps for Ubuntu Users

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