82 lines
3.3 KiB
Markdown
82 lines
3.3 KiB
Markdown
This script converts an alias file to a sieve script for [stalwart-mail](https://stalw.art/).
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All local-parts are considered to be case-insensitive.
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## Usage
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Given an alias file [`testdata/example.aliases`](testdata/example.aliases) that contains lines of redirects of the form localpart with optional `@fqdn` followed by a space followed by a list (space or comma+space separated) list of destinations that consist of a localpart and optionally an `@fqdn`.
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If you don't define an fqdn along any of the addresses, the default domain from your commandline input will be appended.
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An example using the testdata directory of this repository:
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```shell
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$ ./alias_to_sieve testdata/example.aliases example.com
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```
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```sieve
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require ["variables", "copy", "vnd.stalwart.expressions", "envelope", "editheader"];
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let "i" "0";
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while "i < count(envelope.to)" {
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let "redirected" "false";
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if eval "eq_ignore_case(envelope.to[i], 'cali@example.com')" {
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addheader "Delivered-To" "cali@example.com";
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redirect :copy "camilia@example.com";
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deleteheader :index 1 :is "Delivered-To" "cali@example.com";
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let "redirected" "true";
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}
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if eval "eq_ignore_case(envelope.to[i], 'camila@example.com')" {
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addheader "Delivered-To" "camila@example.com";
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redirect :copy "camila@example.edu";
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deleteheader :index 1 :is "Delivered-To" "camila@example.com";
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let "redirected" "true";
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}
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if eval "eq_ignore_case(envelope.to[i], 'jaiden@example.com')" {
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addheader "Delivered-To" "jaiden@example.com";
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redirect :copy "jaiden@example.edu";
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deleteheader :index 1 :is "Delivered-To" "jaiden@example.com";
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let "redirected" "true";
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}
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if eval "eq_ignore_case(envelope.to[i], 'priscilla@example.com')" {
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addheader "Delivered-To" "priscilla@example.com";
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redirect :copy "baldwin@example.org";
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deleteheader :index 1 :is "Delivered-To" "priscilla@example.com";
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let "redirected" "true";
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}
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if eval "eq_ignore_case(envelope.to[i], 'root@example.com')" {
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addheader "Delivered-To" "root@example.com";
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redirect :copy "baldwin@example.org";
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redirect :copy "jaiden@example.edu";
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deleteheader :index 1 :is "Delivered-To" "root@example.com";
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let "redirected" "true";
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}
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if eval "eq_ignore_case(envelope.to[i], 'webteam@example.com')" {
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addheader "Delivered-To" "webteam@example.com";
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redirect :copy "baldwin@example.org";
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redirect :copy "camilia@example.com";
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redirect :copy "jaiden@example.edu";
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deleteheader :index 1 :is "Delivered-To" "webteam@example.com";
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let "redirected" "true";
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}
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if eval "!redirected" {
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let "destination" "envelope.to[i]";
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redirect :copy "${destination}";
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}
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let "i" "i+1";
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}
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discard;
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```
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If you have multiple domains with multiple alias files, pass them all in one run: `$ ./alias_to_sieve simple.aliases example.com example.aliases example.org`.
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## Limitations
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You cannot use apostrophes (') in any mail addresses although allowed by [RFC 5322](https://www.rfc-editor.org/rfc/rfc5322) since they would break termination of strings in sieve.
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This parser is not designed with security in mind. While the above gives some basic protection against code injection, I have no idea whether sieve has other pitfalls that might allow them.
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This is my first rust project, consume the code with care.
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The generated code is specific to stalwart-mail and contains non-standard sieve features.
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