diff --git a/Cargo.lock b/Cargo.lock
index 95a6e1b7..a3797cd1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2420,6 +2420,7 @@ dependencies = [
  "figment",
  "indoc",
  "lettre",
+ "mas-email",
  "mas-iana",
  "mas-jose",
  "mas-keystore",
@@ -2461,7 +2462,6 @@ dependencies = [
  "aws-sdk-sesv2",
  "aws-types",
  "lettre",
- "mas-config",
  "mas-templates",
  "tokio",
  "tracing",
@@ -2483,7 +2483,6 @@ dependencies = [
  "indoc",
  "lettre",
  "mas-axum-utils",
- "mas-config",
  "mas-data-model",
  "mas-email",
  "mas-http",
@@ -2707,7 +2706,6 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "chrono",
- "mas-config",
  "mas-data-model",
  "mas-router",
  "oauth2-types",
diff --git a/crates/cli/src/commands/server.rs b/crates/cli/src/commands/server.rs
index 0b62ff80..b336456c 100644
--- a/crates/cli/src/commands/server.rs
+++ b/crates/cli/src/commands/server.rs
@@ -23,7 +23,8 @@ use clap::Parser;
 use futures::stream::{StreamExt, TryStreamExt};
 use hyper::Server;
 use mas_config::RootConfig;
-use mas_email::{MailTransport, Mailer};
+use mas_email::Mailer;
+use mas_handlers::MatrixHomeserver;
 use mas_http::ServerLayer;
 use mas_policy::PolicyFactory;
 use mas_router::UrlBuilder;
@@ -148,7 +149,7 @@ impl Options {
         let listener = TcpListener::bind(addr).context("could not bind address")?;
 
         // Connect to the mail server
-        let mail_transport = MailTransport::from_config(&config.email.transport).await?;
+        let mail_transport = config.email.transport.to_transport().await?;
         mail_transport.test_connection().await?;
 
         // Connect to the database
@@ -203,7 +204,7 @@ impl Options {
         let policy_factory = Arc::new(policy_factory);
 
         // Load and compile the templates
-        let templates = Templates::load_from_config(&config.templates)
+        let templates = Templates::load(config.templates.path.clone(), config.templates.builtin)
             .await
             .context("could not load templates")?;
 
@@ -218,7 +219,7 @@ impl Options {
 
         let static_files = mas_static_files::service(&config.http.web_root);
 
-        let matrix_config = config.matrix.clone();
+        let homeserver = MatrixHomeserver::new(config.matrix.homeserver.clone());
 
         // Explicitely the config to properly zeroize secret keys
         drop(config);
@@ -242,7 +243,7 @@ impl Options {
             &encrypter,
             &mailer,
             &url_builder,
-            &matrix_config,
+            &homeserver,
             &policy_factory,
         )
         .fallback(static_files)
diff --git a/crates/cli/src/commands/templates.rs b/crates/cli/src/commands/templates.rs
index 2c6e4023..26ba8c7b 100644
--- a/crates/cli/src/commands/templates.rs
+++ b/crates/cli/src/commands/templates.rs
@@ -62,7 +62,7 @@ impl Options {
                     path: Some(path.to_string()),
                     builtin: !skip_builtin,
                 };
-                let templates = Templates::load_from_config(&config).await?;
+                let templates = Templates::load(config.path.clone(), config.builtin).await?;
                 templates.check_render().await?;
 
                 Ok(())
diff --git a/crates/config/Cargo.toml b/crates/config/Cargo.toml
index 81cd585a..f8f7b44f 100644
--- a/crates/config/Cargo.toml
+++ b/crates/config/Cargo.toml
@@ -32,3 +32,4 @@ indoc = "1.0.7"
 mas-jose = { path = "../jose" }
 mas-keystore = { path = "../keystore" }
 mas-iana = { path = "../iana" }
+mas-email = { path = "../email" }
diff --git a/crates/config/src/sections/email.rs b/crates/config/src/sections/email.rs
index 75f57a67..6db56057 100644
--- a/crates/config/src/sections/email.rs
+++ b/crates/config/src/sections/email.rs
@@ -14,8 +14,10 @@
 
 use std::num::NonZeroU16;
 
+use anyhow::Context;
 use async_trait::async_trait;
 use lettre::{message::Mailbox, Address};
+use mas_email::MailTransport;
 use schemars::{
     gen::SchemaGenerator,
     schema::{InstanceType, Schema, SchemaObject},
@@ -51,7 +53,7 @@ pub struct Credentials {
 }
 
 /// Encryption mode to use
-#[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, JsonSchema)]
 #[serde(rename_all = "lowercase")]
 pub enum EmailSmtpMode {
     /// Plain text
@@ -62,6 +64,16 @@ pub enum EmailSmtpMode {
     Tls,
 }
 
+impl From<&EmailSmtpMode> for mas_email::SmtpMode {
+    fn from(value: &EmailSmtpMode) -> Self {
+        match value {
+            EmailSmtpMode::Plain => Self::Plain,
+            EmailSmtpMode::StartTls => Self::StartTls,
+            EmailSmtpMode::Tls => Self::Tls,
+        }
+    }
+}
+
 /// What backend should be used when sending emails
 #[derive(Clone, Debug, Serialize, Deserialize, JsonSchema)]
 #[serde(tag = "transport", rename_all = "snake_case")]
@@ -156,3 +168,30 @@ impl ConfigurationSection<'_> for EmailConfig {
         Self::default()
     }
 }
+
+impl EmailTransportConfig {
+    /// Create a [`lettre::Transport`] out of this config
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the transport could not be created
+    pub async fn to_transport(&self) -> Result<MailTransport, anyhow::Error> {
+        match self {
+            Self::Blackhole => Ok(MailTransport::blackhole()),
+            Self::Smtp {
+                mode,
+                hostname,
+                credentials,
+                port,
+            } => {
+                let credentials = credentials
+                    .clone()
+                    .map(|c| mas_email::SmtpCredentials::new(c.username, c.password));
+                MailTransport::smtp(mode.into(), hostname, port.as_ref().copied(), credentials)
+                    .context("failed to build SMTP transport")
+            }
+            EmailTransportConfig::Sendmail { command } => Ok(MailTransport::sendmail(command)),
+            EmailTransportConfig::AwsSes => Ok(MailTransport::aws_ses().await),
+        }
+    }
+}
diff --git a/crates/email/Cargo.toml b/crates/email/Cargo.toml
index 3664444d..ac9ad74f 100644
--- a/crates/email/Cargo.toml
+++ b/crates/email/Cargo.toml
@@ -15,7 +15,6 @@ aws-config = "0.47.0"
 aws-types = "0.47.0"
 
 mas-templates = { path = "../templates" }
-mas-config = { path = "../config" }
 
 [dependencies.lettre]
 version = "0.10.1"
diff --git a/crates/email/src/lib.rs b/crates/email/src/lib.rs
index 5adc8aa2..754d09df 100644
--- a/crates/email/src/lib.rs
+++ b/crates/email/src/lib.rs
@@ -26,7 +26,9 @@
 mod mailer;
 mod transport;
 
+pub use lettre::transport::smtp::authentication::Credentials as SmtpCredentials;
+
 pub use self::{
     mailer::Mailer,
-    transport::{aws_ses::Transport as AwsSesTransport, Transport as MailTransport},
+    transport::{aws_ses::Transport as AwsSesTransport, SmtpMode, Transport as MailTransport},
 };
diff --git a/crates/email/src/transport/mod.rs b/crates/email/src/transport/mod.rs
index e75ef188..bb1773b7 100644
--- a/crates/email/src/transport/mod.rs
+++ b/crates/email/src/transport/mod.rs
@@ -14,7 +14,7 @@
 
 //! Email transport backends
 
-use std::sync::Arc;
+use std::{ffi::OsString, num::NonZeroU16, sync::Arc};
 
 use async_trait::async_trait;
 use lettre::{
@@ -25,10 +25,20 @@ use lettre::{
     },
     AsyncTransport, Tokio1Executor,
 };
-use mas_config::{EmailSmtpMode, EmailTransportConfig};
 
 pub mod aws_ses;
 
+/// Encryption mode to use
+#[derive(Debug, Clone, Copy)]
+pub enum SmtpMode {
+    /// Plain text
+    Plain,
+    /// StartTLS (starts as plain text then upgrade to TLS)
+    StartTls,
+    /// TLS
+    Tls,
+}
+
 /// A wrapper around many [`AsyncTransport`]s
 #[derive(Default, Clone)]
 pub struct Transport {
@@ -43,52 +53,56 @@ enum TransportInner {
 }
 
 impl Transport {
-    /// Construct a transport from a user configration
+    fn new(inner: TransportInner) -> Self {
+        let inner = Arc::new(inner);
+        Self { inner }
+    }
+
+    /// Construct a blackhole transport
+    #[must_use]
+    pub fn blackhole() -> Self {
+        Self::new(TransportInner::Blackhole)
+    }
+
+    /// Construct a SMTP transport
     ///
     /// # Errors
     ///
-    /// Will return `Err` on invalid confiuration
-    pub async fn from_config(config: &EmailTransportConfig) -> Result<Self, anyhow::Error> {
-        let inner = match config {
-            EmailTransportConfig::Blackhole => TransportInner::Blackhole,
-            EmailTransportConfig::Smtp {
-                mode,
-                hostname,
-                credentials,
-                port,
-            } => {
-                let mut t = match mode {
-                    EmailSmtpMode::Plain => {
-                        AsyncSmtpTransport::<Tokio1Executor>::builder_dangerous(hostname)
-                    }
-                    EmailSmtpMode::StartTls => {
-                        AsyncSmtpTransport::<Tokio1Executor>::starttls_relay(hostname)?
-                    }
-                    EmailSmtpMode::Tls => AsyncSmtpTransport::<Tokio1Executor>::relay(hostname)?,
-                };
-
-                if let Some(credentials) = credentials {
-                    t = t.credentials(Credentials::new(
-                        credentials.username.clone(),
-                        credentials.password.clone(),
-                    ));
-                }
-
-                if let Some(port) = port {
-                    t = t.port((*port).into());
-                }
-
-                TransportInner::Smtp(t.build())
-            }
-            EmailTransportConfig::Sendmail { command } => {
-                TransportInner::Sendmail(AsyncSendmailTransport::new_with_command(command))
-            }
-            EmailTransportConfig::AwsSes => {
-                TransportInner::AwsSes(aws_ses::Transport::from_env().await)
-            }
+    /// Returns an error if the underlying SMTP transport could not be built
+    pub fn smtp(
+        mode: SmtpMode,
+        hostname: &str,
+        port: Option<NonZeroU16>,
+        credentials: Option<Credentials>,
+    ) -> Result<Self, lettre::transport::smtp::Error> {
+        let mut t = match mode {
+            SmtpMode::Plain => AsyncSmtpTransport::<Tokio1Executor>::builder_dangerous(hostname),
+            SmtpMode::StartTls => AsyncSmtpTransport::<Tokio1Executor>::starttls_relay(hostname)?,
+            SmtpMode::Tls => AsyncSmtpTransport::<Tokio1Executor>::relay(hostname)?,
         };
-        let inner = Arc::new(inner);
-        Ok(Self { inner })
+
+        if let Some(credentials) = credentials {
+            t = t.credentials(credentials);
+        }
+
+        if let Some(port) = port {
+            t = t.port(port.into());
+        }
+
+        Ok(Self::new(TransportInner::Smtp(t.build())))
+    }
+
+    /// Construct a Sendmail transport
+    #[must_use]
+    pub fn sendmail(command: impl Into<OsString>) -> Self {
+        Self::new(TransportInner::Sendmail(
+            AsyncSendmailTransport::new_with_command(command),
+        ))
+    }
+
+    /// Construct a AWS SES transport
+    pub async fn aws_ses() -> Self {
+        Self::new(TransportInner::AwsSes(aws_ses::Transport::from_env().await))
     }
 }
 
diff --git a/crates/handlers/Cargo.toml b/crates/handlers/Cargo.toml
index 54a78273..14b3b027 100644
--- a/crates/handlers/Cargo.toml
+++ b/crates/handlers/Cargo.toml
@@ -52,7 +52,6 @@ headers = "0.3.7"
 
 oauth2-types = { path = "../oauth2-types" }
 mas-axum-utils = {  path = "../axum-utils" }
-mas-config = { path = "../config" }
 mas-data-model = { path = "../data-model" }
 mas-email = { path = "../email" }
 mas-http = {  path = "../http" }
diff --git a/crates/handlers/src/compat/login.rs b/crates/handlers/src/compat/login.rs
index 51658ee8..c827dcee 100644
--- a/crates/handlers/src/compat/login.rs
+++ b/crates/handlers/src/compat/login.rs
@@ -15,7 +15,6 @@
 use axum::{response::IntoResponse, Extension, Json};
 use chrono::{Duration, Utc};
 use hyper::StatusCode;
-use mas_config::MatrixConfig;
 use mas_data_model::{CompatSession, CompatSsoLoginState, Device, TokenType};
 use mas_storage::{
     compat::{
@@ -31,7 +30,7 @@ use serde_with::{serde_as, skip_serializing_none, DurationMilliSeconds};
 use sqlx::{PgPool, Postgres, Transaction};
 use thiserror::Error;
 
-use super::MatrixError;
+use super::{MatrixError, MatrixHomeserver};
 
 #[derive(Debug, Serialize)]
 #[serde(tag = "type")]
@@ -199,7 +198,7 @@ impl IntoResponse for RouteError {
 #[tracing::instrument(skip_all, err)]
 pub(crate) async fn post(
     Extension(pool): Extension<PgPool>,
-    Extension(config): Extension<MatrixConfig>,
+    Extension(homeserver): Extension<MatrixHomeserver>,
     Json(input): Json<RequestBody>,
 ) -> Result<impl IntoResponse, RouteError> {
     let mut txn = pool.begin().await?;
@@ -216,7 +215,7 @@ pub(crate) async fn post(
         }
     };
 
-    let user_id = format!("@{}:{}", session.user.username, config.homeserver);
+    let user_id = format!("@{}:{}", session.user.username, homeserver);
 
     // If the client asked for a refreshable token, make it expire
     let expires_in = if input.refresh_token {
diff --git a/crates/handlers/src/compat/mod.rs b/crates/handlers/src/compat/mod.rs
index 3ae2030c..df26cc49 100644
--- a/crates/handlers/src/compat/mod.rs
+++ b/crates/handlers/src/compat/mod.rs
@@ -22,6 +22,22 @@ pub(crate) mod login_sso_redirect;
 pub(crate) mod logout;
 pub(crate) mod refresh;
 
+#[derive(Debug, Clone)]
+pub struct MatrixHomeserver(String);
+
+impl MatrixHomeserver {
+    #[must_use]
+    pub const fn new(hs: String) -> Self {
+        Self(hs)
+    }
+}
+
+impl std::fmt::Display for MatrixHomeserver {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
 #[derive(Debug, Serialize)]
 struct MatrixError {
     errcode: &'static str,
diff --git a/crates/handlers/src/lib.rs b/crates/handlers/src/lib.rs
index 629f0c90..ee19643a 100644
--- a/crates/handlers/src/lib.rs
+++ b/crates/handlers/src/lib.rs
@@ -30,7 +30,6 @@ use axum::{
 };
 use headers::HeaderName;
 use hyper::header::{ACCEPT, ACCEPT_LANGUAGE, AUTHORIZATION, CONTENT_LANGUAGE, CONTENT_TYPE};
-use mas_config::MatrixConfig;
 use mas_email::Mailer;
 use mas_http::CorsLayerExt;
 use mas_keystore::{Encrypter, Keystore};
@@ -46,6 +45,8 @@ mod health;
 mod oauth2;
 mod views;
 
+pub use compat::MatrixHomeserver;
+
 #[must_use]
 #[allow(
     clippy::too_many_lines,
@@ -60,7 +61,7 @@ pub fn router<B>(
     encrypter: &Encrypter,
     mailer: &Mailer,
     url_builder: &UrlBuilder,
-    matrix_config: &MatrixConfig,
+    homeserver: &MatrixHomeserver,
     policy_factory: &Arc<PolicyFactory>,
 ) -> Router<B>
 where
@@ -239,33 +240,28 @@ where
         .layer(Extension(encrypter.clone()))
         .layer(Extension(url_builder.clone()))
         .layer(Extension(mailer.clone()))
-        .layer(Extension(matrix_config.clone()))
+        .layer(Extension(homeserver.clone()))
         .layer(Extension(policy_factory.clone()))
 }
 
 #[cfg(test)]
 async fn test_router(pool: &PgPool) -> Result<Router, anyhow::Error> {
-    use mas_config::TemplatesConfig;
     use mas_email::MailTransport;
 
-    let templates_config = TemplatesConfig::default();
-    let templates = Templates::load_from_config(&templates_config).await?;
+    let templates = Templates::load(None, true).await?;
 
     // TODO: add test keys to the store
     let key_store = Keystore::default();
 
     let encrypter = Encrypter::new(&[0x42; 32]);
 
-    let transport = MailTransport::default();
+    let transport = MailTransport::blackhole();
     let mailbox = "server@example.com".parse()?;
     let mailer = Mailer::new(&templates, &transport, &mailbox, &mailbox);
 
     let url_builder = UrlBuilder::new("https://example.com/".parse()?);
 
-    let matrix_config = MatrixConfig {
-        homeserver: "example.com".to_owned(),
-    };
-
+    let homeserver = MatrixHomeserver::new("example.com".to_owned());
     let policy_factory = PolicyFactory::load_default(serde_json::json!({})).await?;
     let policy_factory = Arc::new(policy_factory);
 
@@ -276,7 +272,7 @@ async fn test_router(pool: &PgPool) -> Result<Router, anyhow::Error> {
         &encrypter,
         &mailer,
         &url_builder,
-        &matrix_config,
+        &homeserver,
         &policy_factory,
     ))
 }
diff --git a/crates/templates/Cargo.toml b/crates/templates/Cargo.toml
index aceeb9d7..2fbde560 100644
--- a/crates/templates/Cargo.toml
+++ b/crates/templates/Cargo.toml
@@ -25,5 +25,4 @@ url = "2.2.2"
 
 oauth2-types = { path = "../oauth2-types" }
 mas-data-model = { path = "../data-model" }
-mas-config = { path = "../config" }
 mas-router = { path = "../router" }
diff --git a/crates/templates/src/lib.rs b/crates/templates/src/lib.rs
index 3ab7e974..3261c55a 100644
--- a/crates/templates/src/lib.rs
+++ b/crates/templates/src/lib.rs
@@ -33,7 +33,6 @@ use std::{
 };
 
 use anyhow::{bail, Context as _};
-use mas_config::TemplatesConfig;
 use mas_data_model::StorageBackend;
 use serde::Serialize;
 use tera::{Context, Error as TeraError, Tera};
@@ -63,7 +62,8 @@ pub use self::{
 #[derive(Debug, Clone)]
 pub struct Templates {
     tera: Arc<RwLock<Tera>>,
-    config: TemplatesConfig,
+    path: Option<String>,
+    builtin: bool,
 }
 
 /// There was an issue while loading the templates
@@ -90,7 +90,7 @@ pub enum TemplateLoadingError {
 impl Templates {
     /// List directories to watch
     pub async fn watch_roots(&self) -> Vec<PathBuf> {
-        Self::roots(self.config.path.as_deref(), self.config.builtin)
+        Self::roots(self.path.as_deref(), self.builtin)
             .await
             .into_iter()
             .filter_map(Result::ok)
@@ -133,17 +133,17 @@ impl Templates {
         Ok(tera)
     }
 
-    /// Load the templates from [the config][`TemplatesConfig`]
-    pub async fn load_from_config(config: &TemplatesConfig) -> Result<Self, TemplateLoadingError> {
-        let tera = Self::load(config.path.as_deref(), config.builtin).await?;
-
+    /// Load the templates from the given config
+    pub async fn load(path: Option<String>, builtin: bool) -> Result<Self, TemplateLoadingError> {
+        let tera = Self::load_(path.as_deref(), builtin).await?;
         Ok(Self {
             tera: Arc::new(RwLock::new(tera)),
-            config: config.clone(),
+            path,
+            builtin,
         })
     }
 
-    async fn load(path: Option<&str>, builtin: bool) -> Result<Tera, TemplateLoadingError> {
+    async fn load_(path: Option<&str>, builtin: bool) -> Result<Tera, TemplateLoadingError> {
         let mut teras = Vec::new();
 
         let roots = Self::roots(path, builtin).await;
@@ -202,7 +202,7 @@ impl Templates {
     /// Reload the templates on disk
     pub async fn reload(&self) -> anyhow::Result<()> {
         // Prepare the new Tera instance
-        let new_tera = Self::load(self.config.path.as_deref(), self.config.builtin).await?;
+        let new_tera = Self::load_(self.path.as_deref(), self.builtin).await?;
 
         // Swap it
         *self.tera.write().await = new_tera;
@@ -378,12 +378,7 @@ mod tests {
 
     #[tokio::test]
     async fn check_builtin_templates() {
-        let config = TemplatesConfig {
-            path: None,
-            builtin: true,
-        };
-
-        let templates = Templates::load_from_config(&config).await.unwrap();
+        let templates = Templates::load(None, true).await.unwrap();
         templates.check_render().await.unwrap();
     }
 }