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It is can be convenient for hooks to indicate that an error is permanent; for example if the anti-virus found something. This patch makes it so that if the hook exits with code 20, then it's considered permanent. Otherwise it is considered transient, to help prevent accidental errors cause final delivery issues.
39 lines
936 B
Bash
Executable File
39 lines
936 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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#
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# If it exits with code 20, it will be considered a permanent error.
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# Otherwise, temporary.
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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 20 # permanent
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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 20 # permanent
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fi
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echo "X-Virus-Scanned: pass"
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fi
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