On 5/11/26 16:08, Rievo Niemrod Efraim via Mdaemon-L wrote:
Ini ada tambahan lagi info dari dari sender dapat notif berikut
Errore: 554 5.7.1 Service unavailable; Client host [52.101.188.87] blocked using ips.backscatterer.org; Sorry 52.101.188.87 is blacklisted athttp://www.backscatterer.org/?ip=52.101.188.87
Messaggio rifiutato da: mxin-serv2.dwp.net.id
Artinya apa ya ?
Server mxin-serv2.dwp.net.id kelihatannya mengaktifkan fitur DNSBL
backscatter.org
http://www.backscatterer.org/index.php?target=home
Dan nampaknya IP 52.101.188.87 masuk dalam daftar DNSBL tersebut.
Umumnya Backscatter adalah salah satu metode antispam untuk melindungi
spam mail dari sender (MAIL FROM) Null Return-Path address (< >), dpl.
pencegahan terhadap mail yang salah duga, bukan DNSBL.
https://en.wikipedia.org/wiki/Backscatter_(email)
Backscatter (also known as outscatter, misdirected bounces, blowback or
collateral spam) is incorrectly automated bounce messages sent by mail
servers, typically as a side effect of incoming spam.
MDaemon juga mendukung Anti Backscatter
https://mdaemon.dutaint.com/mdaemon/26.0.0/security--backscatter_protection_dialog.html
Messages with a "mailer-daemon@..." or NULL reverse path will fail if
they do not contain the special code or if the code's seven day
life-cycle has expired. Because of Backscatter Protection's solid
reliability, there are no false positives or "gray areas" — a message is
valid or it isn't. For this reason it is safe to configure MDaemon to
reject invalid messages, as long as you ensure that all of your
accounts' outgoing messages contain the special BP code. In all cases,
however, the result of BP verification will be logged into the SMTP-in
log file, even when you choose not to reject messages that fail
verification. Incoming messages for gateways will not be rejected unless
you have checked the ...apply Backscatter Protection to gateway domains
option above.
--
syafril
--------
Syafril Hermansyah
MDaemon-L Moderator, run MDaemon 26.0.2 Beta B
Mohon tidak kirim private mail (atau cc:) untuk masalah MDaemon.
Ambisi adalah spt air laut, semakin banyak org meminumnya, semakin haus
-- Robert von Hartman, 1842-1906
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