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Documentation and usage example for sieve script 2025-04-14 10:47:32 +02:00
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This script converts an alias file to a sieve script for [stalwart-mail](https://stalw.art/). This script converts an alias file to a sieve script for [stalwart-mail](https://stalw.art/).
## Usage ## Usage
Given an alias file `testdata/simple.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`. 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`.
If you don't define a fqdn along any of the addresses, the default domain from your commandline input will be appended. If you don't define a 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: An example using the testdata directory of this repository:
```bash ```shell
$ ./alias_to_sieve testdata/simple.aliases example.com $ ./alias_to_sieve testdata/example.aliases example.com
``` ```
```sieve ```sieve
require ["variables", "copy", "vnd.stalwart.expressions", "envelope", "editheader"]; require ["variables", "copy", "vnd.stalwart.expressions", "envelope", "editheader"];
@ -14,32 +14,49 @@ require ["variables", "copy", "vnd.stalwart.expressions", "envelope", "editheade
let "i" "0"; let "i" "0";
while "i < count(envelope.to)" { while "i < count(envelope.to)" {
let "redirected" "false"; let "redirected" "false";
if eval "eq_ignore_case(envelope.to[i], 'admin@example.com')" { if eval "eq_ignore_case(envelope.to[i], 'cali@example.com')" {
addheader "Delivered-To" "admin@example.com"; addheader "Delivered-To" "cali@example.com";
redirect :copy "me@example.org"; redirect :copy "camilia@example.com";
deleteheader :index 1 :is "Delivered-To" "admin@example.com"; deleteheader :index 1 :is "Delivered-To" "cali@example.com";
let "redirected" "true"; let "redirected" "true";
} }
if eval "eq_ignore_case(envelope.to[i], 'postmaster@example.com')" { if eval "eq_ignore_case(envelope.to[i], 'camila@example.com')" {
addheader "Delivered-To" "postmaster@example.com"; addheader "Delivered-To" "camila@example.com";
redirect :copy "me@example.org"; redirect :copy "camila@example.edu";
deleteheader :index 1 :is "Delivered-To" "postmaster@example.com"; 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"; let "redirected" "true";
} }
if eval "eq_ignore_case(envelope.to[i], 'root@example.com')" { if eval "eq_ignore_case(envelope.to[i], 'root@example.com')" {
addheader "Delivered-To" "root@example.com"; addheader "Delivered-To" "root@example.com";
redirect :copy "me@example.org"; redirect :copy "baldwin@example.org";
redirect :copy "jaiden@example.edu";
deleteheader :index 1 :is "Delivered-To" "root@example.com"; deleteheader :index 1 :is "Delivered-To" "root@example.com";
let "redirected" "true"; let "redirected" "true";
} }
if eval "eq_ignore_case(envelope.to[i], 'sudo@example.com')" { if eval "eq_ignore_case(envelope.to[i], 'webteam@example.com')" {
addheader "Delivered-To" "sudo@example.com"; addheader "Delivered-To" "webteam@example.com";
redirect :copy "me@example.org"; redirect :copy "baldwin@example.org";
redirect :copy "camilia@example.com";
redirect :copy "jaiden@example.edu";
deleteheader :index 1 :is "Delivered-To" "sudo@example.com"; deleteheader :index 1 :is "Delivered-To" "webteam@example.com";
let "redirected" "true"; let "redirected" "true";
} }
if eval "!redirected" { if eval "!redirected" {
@ -49,10 +66,9 @@ while "i < count(envelope.to)" {
let "i" "i+1"; let "i" "i+1";
} }
discard; discard;
``` ```
If you have multiple domains with multiple alias files, pass them all in one run: `$ ./alias_to_sieve simple.aliases example.com other.aliases example.org`. 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 ## 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. 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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priscilla baldwin@example.org
jaiden jaiden@example.edu
camila camila@example.edu
cali camilia
webteam root, camilia
root priscilla jaiden