diff --git a/src/admin/appservice/commands.rs b/src/admin/appservice/commands.rs
index 878fbf6f..29b3c0e8 100644
--- a/src/admin/appservice/commands.rs
+++ b/src/admin/appservice/commands.rs
@@ -1,4 +1,5 @@
 use futures::StreamExt;
+use ruma::api::appservice::Registration;
 use tuwunel_core::{Err, Result, checked, err};
 
 use crate::admin_command;
@@ -16,18 +17,19 @@ pub(super) async fn appservice_register(&self) -> Result {
 
 	let range = 1..checked!(body_len - 1)?;
 	let appservice_config_body = body[range].join("\n");
-	let parsed_config = serde_yaml::from_str(&appservice_config_body);
 
-	let registration =
-		parsed_config.map_err(|e| err!("Could not parse appservice config as YAML: {e}"))?;
+	let registration: Registration = serde_yaml::from_str(&appservice_config_body)
+		.map_err(|e| err!("Could not parse appservice config as YAML: {e}"))?;
+
+	let id = registration.id.clone();
 
 	self.services
 		.appservice
-		.register_appservice(&registration, &appservice_config_body)
+		.register_appservice(registration)
 		.await
 		.map_err(|e| err!("Failed to register appservice: {e}"))?;
 
-	self.write_str(&format!("Appservice registered with ID: {}", registration.id))
+	self.write_str(&format!("Appservice registered with ID: {}", &id))
 		.await
 }
 
diff --git a/src/service/appservice/mod.rs b/src/service/appservice/mod.rs
index 20972fef..73443b8f 100644
--- a/src/service/appservice/mod.rs
+++ b/src/service/appservice/mod.rs
@@ -80,7 +80,10 @@ impl Service {
 				self.registration_info
 					.write()
 					.await
-					.insert(id.clone(), reg.try_into()?)
+					.insert(
+						id.clone(),
+						RegistrationInfo::new(reg, self.services.globals.server_name())?,
+					)
 					.map_or(Ok(()), |_| Err!("Conflicting Appservice ID: {id:?}"))
 			})
 			.await
@@ -105,42 +108,36 @@ impl Service {
 		Ok(())
 	}
 
-	/// Registers an appservice and returns the ID to the caller
-	pub async fn register_appservice(
-		&self,
-		registration: &Registration,
-		appservice_config_body: &str,
-	) -> Result {
-		let appservice_user = UserId::parse_with_server_name(
-			&registration.sender_localpart,
-			&self.services.config.server_name,
-		)?;
+	pub async fn register_appservice(&self, registration: Registration) -> Result {
+		let appservice_yaml = serde_yaml::to_string(&registration)?;
 
-		if !self.services.users.exists(&appservice_user).await {
+		let id = registration.id.clone();
+
+		let registration_info =
+			RegistrationInfo::new(registration, self.services.globals.server_name())?;
+
+		let appservice_user = &registration_info.sender;
+
+		if !self.services.users.exists(appservice_user).await {
 			self.services
 				.users
-				.create(&appservice_user, None, None)
+				.create(appservice_user, None, None)
 				.await?;
 		}
 
 		//TODO: Check for collisions between exclusive appservice namespaces
+		self.db
+			.id_appserviceregistrations
+			.insert(&id, appservice_yaml);
+
 		self.registration_info
 			.write()
 			.await
-			.insert(registration.id.clone(), registration.clone().try_into()?);
-
-		self.db
-			.id_appserviceregistrations
-			.insert(&registration.id, appservice_config_body);
+			.insert(id, registration_info);
 
 		Ok(())
 	}
 
-	/// Remove an appservice registration
-	///
-	/// # Arguments
-	///
-	/// * `service_name` - the registration ID of the appservice
 	pub async fn unregister_appservice(&self, appservice_id: &str) -> Result {
 		// removes the appservice registration info
 		self.registration_info
diff --git a/src/service/appservice/registration_info.rs b/src/service/appservice/registration_info.rs
index 60c348dc..e78a17b5 100644
--- a/src/service/appservice/registration_info.rs
+++ b/src/service/appservice/registration_info.rs
@@ -1,4 +1,4 @@
-use ruma::{UserId, api::appservice::Registration};
+use ruma::{OwnedUserId, ServerName, UserId, api::appservice::Registration};
 use tuwunel_core::Result;
 
 use super::NamespaceRegex;
@@ -10,32 +10,35 @@ pub struct RegistrationInfo {
 	pub users: NamespaceRegex,
 	pub aliases: NamespaceRegex,
 	pub rooms: NamespaceRegex,
+	pub sender: OwnedUserId,
 }
 
 impl RegistrationInfo {
+	pub fn new(registration: Registration, server_name: &ServerName) -> Result<Self> {
+		let sender =
+			OwnedUserId::parse(format!("@{}:{}", registration.sender_localpart, server_name))?;
+
+		Ok(Self {
+			users: registration.namespaces.users.clone().try_into()?,
+			aliases: registration
+				.namespaces
+				.aliases
+				.clone()
+				.try_into()?,
+			rooms: registration.namespaces.rooms.clone().try_into()?,
+			registration,
+			sender,
+		})
+	}
+
 	#[must_use]
 	pub fn is_user_match(&self, user_id: &UserId) -> bool {
-		self.users.is_match(user_id.as_str())
-			|| self.registration.sender_localpart == user_id.localpart()
+		user_id == self.sender || self.users.is_match(user_id.as_str())
 	}
 
 	#[inline]
 	#[must_use]
 	pub fn is_exclusive_user_match(&self, user_id: &UserId) -> bool {
-		self.users.is_exclusive_match(user_id.as_str())
-			|| self.registration.sender_localpart == user_id.localpart()
-	}
-}
-
-impl TryFrom<Registration> for RegistrationInfo {
-	type Error = regex::Error;
-
-	fn try_from(value: Registration) -> Result<Self, regex::Error> {
-		Ok(Self {
-			users: value.namespaces.users.clone().try_into()?,
-			aliases: value.namespaces.aliases.clone().try_into()?,
-			rooms: value.namespaces.rooms.clone().try_into()?,
-			registration: value,
-		})
+		user_id == self.sender || self.users.is_exclusive_match(user_id.as_str())
 	}
 }