how to block sender with empty email address?

Copper Contributor

Sep 15, 2023

many thanks for your help, under your guidance.

last night i have done the block action with powershell, and it succedded.

[PS] C:\Windows\system32>Set-SenderFilterConfig -BlankSenderBlockingEnabled $true
[PS] C:\Windows\system32>Get-SenderFilterConfig |fl blanksenderblockingenabled

BlankSenderBlockingEnabled : True

however, i checked the exchange server this morning and still find an email sent with blank email address this morning at

Date Received: 2023/9/15 0:21:07

is it the function blanksenderblocking not working or any other else factor?

i pasted the email head below, i highlight the sender and recipients with red. obviously the recipients address is not our domain. apparently this is an jungle email.

Identity: ******\6534\26220775342086
Subject: 未送达: 【ETC】重要なお知らせ
Internet Message ID: <ae14d689-fffc-445f-80e5-0ddc2aa85bf3@*****.***.cn>
From Address: <>
Status: 就绪
Size (KB): 18
Message Source Name: DSN
Source IP: 255.255.255.255
SCL: -1
Date Received: 2023/9/15 0:21:07
Expiration Time: 2023/9/17 0:21:07
Last Error: 400 4.4.7 Message delayed
Queue ID: ******\6534
Recipients: email address removed for privacy reasons;2;2;[{LED=400 4.4.7 Message delayed};{MSG=};{FQDN=};{IP=};{LRT=}];0;CN=Luoman-outbound,CN=Connections,CN=Exchange Routing Group (DWBGZMFD01QNBJR),CN=Routing Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=SH Luoman,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=shluoman,DC=cn;0

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how to block sender with empty email address?

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