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authorbrian m. carlson <sandals@crustytoothpaste.net>2022-03-10 01:32:27 +0000
committerbrian m. carlson <sandals@crustytoothpaste.net>2022-03-10 01:32:27 +0000
commitbbc2aad9fdf26722e0baad60270c4cbbe01e6036 (patch)
tree85781c9ee70ddab8005da31179a06c3024e688bc
parent5b2a5c657fe4fb2d968c1ebe240d7e7ba465dba9 (diff)
postfix/client-access: block MicrosoftHEADmaster
Microsoft, through its outlook.com service, has blocked the MX for this domain without cause. There is no evidence that any IP for the MX has been involved in spam or abuse for as long as it's been used this machine (and hence been within the responsibility of this domain). When attempting to request and unblock from the same MX, the delisting address states that it's been blocked because a Frontbridge admin has chosen to block it without providing any reason. Attempting to email them from a different domain results in no response. Using the delisting form results in a response claiming that delisting will occur, but it does not. postmaster is not deliverable. It is certainly up to Microsoft to decide from whom to accept mail. However, similarly, it is also up to the management of this domain to decide from whom to accept mail, and because Microsoft refuses to provide any evidence of abuse or rationale for blocking this machine and because the outlook.com service provides mail for many users, this domain will not accept mail from Microsoft until such time as they choose to unblock this domain and apologize for their behaviour, or provide proof that abuse has occurred from the machine in question while this domain has been responsible for it and provide a working postmaster address answered by a human, as required by RFCs 2142 and 5322.
-rw-r--r--modules/crustytoothpaste/files/etc/postfix/maps/client-access3
1 files changed, 3 insertions, 0 deletions
diff --git a/modules/crustytoothpaste/files/etc/postfix/maps/client-access b/modules/crustytoothpaste/files/etc/postfix/maps/client-access
index 4678931..fbcfe13 100644
--- a/modules/crustytoothpaste/files/etc/postfix/maps/client-access
+++ b/modules/crustytoothpaste/files/etc/postfix/maps/client-access
@@ -314,3 +314,6 @@ telstra.com REJECT CONN:ABUSE
prodigy.net.mx REJECT CONN:ABUSE
# Challenge-response.
idahosif.org REJECT CONN:POSTMASTER
+## Broken domains.
+outlook.com REJECT CONN:BROKEN: Microsoft is blocking this MX without cause. When you've had them fix it, please email postmaster to be unblocked.
+microsoft.com REJECT CONN:BROKEN: Microsoft is blocking this MX without cause. When you've had them fix it, please email postmaster to be unblocked.