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4
packages/alias-to-sieve/Cargo.toml
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@ -4,10 +4,6 @@ version = "0.1.0"
edition = "2021" edition = "2021"
rust-version = "1.68.2" rust-version = "1.68.2"
description = "Convert an alias file to a sieve script for stalwart-mail"
readme = "README.md"
license = " AGPL-3.0-only"
keywords = ["mail", "sieve", "alias", "stalwart"]
[dependencies] [dependencies]
fqdn = {version = "0.4.2", features = ["domain-label-length-limited-to-63", "domain-name-without-special-chars"]} fqdn = {version = "0.4.2", features = ["domain-label-length-limited-to-63", "domain-name-without-special-chars"]}

82
packages/alias-to-sieve/README.md
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@ -1,82 +0,0 @@
This script converts an alias file to a sieve script for [stalwart-mail](https://stalw.art/).
All local-parts are considered to be case-insensitive.
## Usage
Given an alias file [`testdata/example.aliases`](testdata/example.aliases) that contains lines of redirects of the form local-part with optional `@fqdn` followed by a space followed by a list (space or comma+space separated) list of destinations that consist of a local-part and optionally an `@fqdn`.
If you don't define an fqdn along any of the addresses, the default domain from your commandline input will be appended.
An example using the testdata directory of this repository:
```shell
$ ./alias_to_sieve testdata/example.aliases example.com
```
```sieve
require ["variables", "copy", "vnd.stalwart.expressions", "envelope", "editheader"];
let "i" "0";
while "i < count(envelope.to)" {
let "redirected" "false";
if eval "eq_ignore_case(envelope.to[i], 'cali@example.com')" {
addheader "Delivered-To" "cali@example.com";
redirect :copy "camilia@example.com";
deleteheader :index 1 :is "Delivered-To" "cali@example.com";
let "redirected" "true";
}
if eval "eq_ignore_case(envelope.to[i], 'camila@example.com')" {
addheader "Delivered-To" "camila@example.com";
redirect :copy "camila@example.edu";
deleteheader :index 1 :is "Delivered-To" "camila@example.com";
let "redirected" "true";
}
if eval "eq_ignore_case(envelope.to[i], 'jaiden@example.com')" {
addheader "Delivered-To" "jaiden@example.com";
redirect :copy "jaiden@example.edu";
deleteheader :index 1 :is "Delivered-To" "jaiden@example.com";
let "redirected" "true";
}
if eval "eq_ignore_case(envelope.to[i], 'priscilla@example.com')" {
addheader "Delivered-To" "priscilla@example.com";
redirect :copy "baldwin@example.org";
deleteheader :index 1 :is "Delivered-To" "priscilla@example.com";
let "redirected" "true";
}
if eval "eq_ignore_case(envelope.to[i], 'root@example.com')" {
addheader "Delivered-To" "root@example.com";
redirect :copy "baldwin@example.org";
redirect :copy "jaiden@example.edu";
deleteheader :index 1 :is "Delivered-To" "root@example.com";
let "redirected" "true";
}
if eval "eq_ignore_case(envelope.to[i], 'webteam@example.com')" {
addheader "Delivered-To" "webteam@example.com";
redirect :copy "baldwin@example.org";
redirect :copy "camilia@example.com";
redirect :copy "jaiden@example.edu";
deleteheader :index 1 :is "Delivered-To" "webteam@example.com";
let "redirected" "true";
}
if eval "!redirected" {
let "destination" "envelope.to[i]";
redirect :copy "${destination}";
}
let "i" "i+1";
}
discard;
```
If you have multiple domains with multiple alias files, pass them all in one run: `$ ./alias_to_sieve simple.aliases example.com example.aliases example.org`.
## Limitations
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.
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.
This is my first rust project, consume the code with care.
The generated code is specific to stalwart-mail and contains non-standard sieve features.

8
packages/alias-to-sieve/testdata/example.aliases vendored
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@ -1,8 +0,0 @@
priscilla baldwin@example.org
jaiden jaiden@example.edu
camila camila@example.edu
cali camilia
webteam root, camilia
root priscilla jaiden