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user569825
Asked: 2015-03-12 09:28:58 +0800 CST

How to configure postfix to use one virtual alias file per domain?

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In Exim I have one file per domain where the filename itself is used to determine the domain for the aliases.

For example, I'd have a file named example.org with contents like this:

foo:      somelocaluser

This causes mail to [email protected] to be delivered to somelocaluser.

In Postfix the common setup is to use the file named virtual and repeat the domain for every local part over and over again:

[email protected]: somelocaluser
[email protected]: somelocaluser

How can I achieve my Exim-style setup in Postfix and thus avoid the repetiton?

postfix

1 Answers

  1. No, you can't

    Your desired feature doesn't exist in postfix hash table. Postfix database lookup always get key from the entry of the file, it can't mix it with the file name.

    More info: Postfix Lookup Table Overview

    However, you can achieve the same with little scripting. The script should loop all files then append the file name string to first column of the entry then combine it.

    The ugly script like this should do the job fine

    for file in `find /tmp/mapfiles -type f -maxdepth 1`; do
    grep : "$file" | while read line; do
        mykey=$(echo "$line" | cut -d':' -f1)
        myvalue=$(echo "$line" | cut -d':' -f2)
        filename=$(basename "$file")
        echo "${mykey}@${filename}: ${myvalue}"
    done
done

    Don't forget to postmap or postalias the output file.

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