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This patch implements a post-DATA hook, which is run after receiving the data but before sending a reply. It can be used to implement content filtering when receiving email, for example for passing the email through an anti-spam or an anti-virus.
36 lines
813 B
Bash
Executable File
36 lines
813 B
Bash
Executable File
#!/bin/bash
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#
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# This file is an example post-data hook that will run standard filtering
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# utilities if they are available.
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#
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# - spamc (from Spamassassin) to filter spam.
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# - clamdscan (from ClamAV) to filter virus.
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set -e
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TF="$(mktemp --tmpdir "post-data-XXXXXXXXXX")"
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trap 'rm "$TF"' EXIT
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# Save the message to the temporary file, so we can pass it on to the various
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# filters.
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cat > "$TF"
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if command -v spamc >/dev/null; then
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if ! SL=$(spamc -c - < "$TF") ; then
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echo "spam detected"
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exit 1
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fi
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echo "X-Spam-Score: $SL"
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fi
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if command -v clamdscan >/dev/null; then
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if ! clamdscan --no-summary --infected - < "$TF" 1>&2 ; then
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echo "virus detected"
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exit 1
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fi
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echo "X-Virus-Scanned: pass"
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fi
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