diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08bb764b..1eac5b08 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -67,6 +67,7 @@ If you are upgrading from v0.16.x, replace the binary (or run `docker pull`). If
    - Websupport
    - Yandex Cloud DNS
 - DNS updater: Log DNS record types and values.
+- Sieve: Allow User Sieve scripts to access `orcpt`.
 
 ## Changed
 - Bump JMAP File Storage to [draft-ietf-jmap-filenode-14](https://datatracker.ietf.org/doc/html/draft-ietf-jmap-filenode-14).
diff --git a/crates/email/src/message/delivery.rs b/crates/email/src/message/delivery.rs
index 99b177cf..399d58c9 100644
--- a/crates/email/src/message/delivery.rs
+++ b/crates/email/src/message/delivery.rs
@@ -30,6 +30,7 @@ pub struct IngestMessage {
 #[derive(Debug)]
 pub struct IngestRecipient {
     pub address: String,
+    pub orcpt: Option<String>,
     pub is_spam: bool,
 }
 
diff --git a/crates/email/src/sieve/ingest.rs b/crates/email/src/sieve/ingest.rs
index 7e772c14..4f363cba 100644
--- a/crates/email/src/sieve/ingest.rs
+++ b/crates/email/src/sieve/ingest.rs
@@ -129,6 +129,9 @@ impl SieveScriptIngest for Server {
         // Set envelope
         instance.set_envelope(Envelope::From, envelope_from);
         instance.set_envelope(Envelope::To, envelope_to.address.as_str());
+        if let Some(orcpt) = &envelope_to.orcpt {
+            instance.set_envelope(Envelope::Orcpt, orcpt.as_str());
+        }
         instance.set_spam_status(if envelope_to.is_spam {
             SpamStatus::Spam
         } else {
diff --git a/crates/http/src/form/mod.rs b/crates/http/src/form/mod.rs
index 5985a283..52475460 100644
--- a/crates/http/src/form/mod.rs
+++ b/crates/http/src/form/mod.rs
@@ -183,6 +183,7 @@ impl FormHandler for Server {
                         .iter()
                         .map(|address| IngestRecipient {
                             address: address.clone(),
+                            orcpt: None,
                             is_spam: false,
                         })
                         .collect(),
diff --git a/crates/smtp/src/outbound/local.rs b/crates/smtp/src/outbound/local.rs
index 598cf160..3ae354e4 100644
--- a/crates/smtp/src/outbound/local.rs
+++ b/crates/smtp/src/outbound/local.rs
@@ -33,6 +33,7 @@ impl MessageWrapper {
             let rcpt_addr = rcpt.address();
             recipients.push(IngestRecipient {
                 address: rcpt_addr.to_lowercase(),
+                orcpt: rcpt.orcpt.as_ref().map(|orcpt| orcpt.to_string()),
                 is_spam: rcpt.flags & RCPT_SPAM_PAYLOAD != 0,
             });
             pending_recipients.push((rcpt_idx, rcpt_addr));