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Eror SMTP Diblok Bagi yang Menggunakan Server Blackhole Security Sage

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Email bermasalah lagi, hari ini akun email kantor tidak dapat menerima email seperti artikel saya yang sebelumnya.

Lalu saya gunakan gmail untuk coba tes kirim email ke salah satu akun email kantor. Gmail tidak dapat mengirimkan email ke salah satu akun email di kantor dan laporannya seperti ini :

This is an automatically generated Delivery Status Notification


Delivery to the following recipient failed permanently:


   


Technical details of permanent failure:

PERM_FAILURE: Gmail tried to deliver your message, but it was rejected
by the recipient domain. We recommend contacting the other email
provider for further information about the cause of this error. The
error that the other server returned was: 554 554 Service unavailable;
Client host [yw-out-2324.google.com] blocked using blackhole.securitysage.com (state 14).

Sepertinya ada masalah dengan blackhole.securitysage.com. Dalam tulisan saya sebelumnya gmail memberikan saran agar saya menghapus relays ordb.org dari server mail, tapi kali gmail hanya menyarankan untuk menghubungi penyedia email lainnya. Namun saya tidak menyerah begitu saja, saya edit  /etc/postfix/main.cf :

jafar@dns:~$ sudo vi /etc/postfix/main.cf

smtpd_recipient_restrictions = permit_mynetworks,

        permit_sasl_authenticated,
        reject_non_fqdn_hostname,
        reject_non_fqdn_sender,
        reject_non_fqdn_recipient,
        reject_unauth_destination,
        reject_unauth_pipelining,
        reject_invalid_hostname,
        reject_rhsbl_client blackhole.securitysage.com,
        reject_rhsbl_sender blackhole.securitysage.com,
        reject_rbl_client relays.ordb.org,
        reject_rbl_client blackholes.easynet.nl,


Hapus baris 'reject_rhsbl_sender blackhole.securitysage.com' atau kita dapat menon-aktifkannya. Saya rasa itu masalahnya dan ternyata benar. Sekarang saya sudah bisa mengirimkan email dari gmail.

Koreksi :

Ternyata cara diatas hanya bertahan untuk sementara waktu saja, beberapa saat kemudian kembali bermasalah. Untuk itu akhirnya saya menonaktifkan semua rbl client. Sampai sekarang cara ini cukup efektif.

smtpd_recipient_restrictions = permit_mynetworks,
        permit_sasl_authenticated,
        reject_non_fqdn_hostname,
        reject_non_fqdn_sender,
        reject_non_fqdn_recipient,
        reject_unauth_destination,
        reject_unauth_pipelining,
        reject_invalid_hostname,
#       reject_rhsbl_client blackhole.securitysage.com,
        #reject_rhsbl_sender blackhole.securitysage.com,
        #reject_rbl_client relays.ordb.org,
#       reject_rbl_client blackholes.easynet.nl,
#       reject_rbl_client cbl.abuseat.org,
#       reject_rbl_client proxies.blackholes.wirehub.net,
#       reject_rbl_client bl.spamcop.net,
#       reject_rbl_client sbl.spamhaus.org,
#       reject_rbl_client opm.blitzed.org,
#       reject_rbl_client dnsbl.njabl.org,
#       reject_rbl_client list.dsbl.org,
#       reject_rbl_client bl.spamcop.net,
#       reject_rbl_client multihop.dsbl.org