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adamalbers/Block Abnormal Charsets in Exchange.ps1

Last active March 7, 2022 15:17
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Block Abnormal Charsets in Exchange.ps1
# Quarantines any emails using $blockedCharsets
# Supported charsets: https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/remote-domains/supported-character-sets
$allowedCharsets = @('UTF-8','US-ASCII','ISO-8859-1','WINDOWS-1252')
$blockedCharsetWords = @('big5','euc','gb','iso','koi','ks','ns','sen','shift','windows')
New-TransportRule -Name "Block Abnormal Charsets" -ContentCharacterSetContainsWords $blockedCharsetWords -ExceptIfContentCharacterSetContainsWords $allowedCharsets -Quarantine $true -Priority 0
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