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@@ -1,6 +1,7 @@
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FROM alpine:3.10
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-RUN apk add --no-cache postfix
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+ARG POSTFIX_PACKAGE_VERSION=3.4.7-r0
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+RUN apk add --no-cache postfix=$POSTFIX_PACKAGE_VERSION
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# http://www.postfix.org/MAILLOG_README.html
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RUN postconf -F | grep -E '^postlog/unix-dgram/service = postlog$' \
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