diff --git a/CHANGELOG.md b/CHANGELOG.md
index 19a5460..848dc13 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Man pages.
 - The project can now be built and installed using `make`.
+- The post-operation hooks now have access to the `is_success` template variable.
 
 ### Changed
 - Unknown configuration fields are no longer tolerated.
diff --git a/acmed/src/certificate.rs b/acmed/src/certificate.rs
index 28a2e4e..9637c3c 100644
--- a/acmed/src/certificate.rs
+++ b/acmed/src/certificate.rs
@@ -164,7 +164,7 @@ impl Certificate {
         hooks::call(data, &self.hooks, hook_type)
     }
 
-    pub fn call_post_operation_hooks(&self, status: &str) -> Result<(), Error> {
+    pub fn call_post_operation_hooks(&self, status: &str, is_success: bool) -> Result<(), Error> {
         let domains = self
             .domains
             .iter()
@@ -174,6 +174,7 @@ impl Certificate {
             domains,
             algorithm: self.algo.to_string(),
             status: status.to_string(),
+            is_success,
         };
         hooks::call(&hook_data, &self.hooks, HookType::PostOperation)?;
         Ok(())
diff --git a/acmed/src/hooks.rs b/acmed/src/hooks.rs
index 64f097d..de067f8 100644
--- a/acmed/src/hooks.rs
+++ b/acmed/src/hooks.rs
@@ -14,6 +14,7 @@ pub struct PostOperationHookData {
     pub domains: Vec<String>,
     pub algorithm: String,
     pub status: String,
+    pub is_success: bool,
 }
 
 #[derive(Serialize)]
diff --git a/acmed/src/main_event_loop.rs b/acmed/src/main_event_loop.rs
index d13001a..73bcdd3 100644
--- a/acmed/src/main_event_loop.rs
+++ b/acmed/src/main_event_loop.rs
@@ -57,20 +57,21 @@ impl MainEventLoop {
                 match crt.should_renew() {
                     Ok(sr) => {
                         if sr {
-                            let status = match request_certificate(crt, &self.root_certs) {
-                                Ok(_) => "Success.".to_string(),
-                                Err(e) => {
-                                    let msg = format!(
-                                        "Unable to renew the {} certificate for {}: {}",
-                                        crt.algo,
-                                        crt.domains.first().unwrap().0,
-                                        e
-                                    );
-                                    warn!("{}", msg);
-                                    format!("Failed: {}", msg)
-                                }
-                            };
-                            match crt.call_post_operation_hooks(&status) {
+                            let (status, is_success) =
+                                match request_certificate(crt, &self.root_certs) {
+                                    Ok(_) => ("Success.".to_string(), true),
+                                    Err(e) => {
+                                        let msg = format!(
+                                            "Unable to renew the {} certificate for {}: {}",
+                                            crt.algo,
+                                            crt.domains.first().unwrap().0,
+                                            e
+                                        );
+                                        warn!("{}", msg);
+                                        (format!("Failed: {}", msg), false)
+                                    }
+                                };
+                            match crt.call_post_operation_hooks(&status, is_success) {
                                 Ok(_) => {}
                                 Err(e) => {
                                     let msg = format!(
diff --git a/man/en/acmed.toml.5 b/man/en/acmed.toml.5
index 149a844..72b0bfd 100644
--- a/man/en/acmed.toml.5
+++ b/man/en/acmed.toml.5
@@ -317,9 +317,9 @@ Array containing the domain names included in the requested certificate.
 .It Cm algorithm Ar string
 Name of the algorithm used in the certificate.
 .It Cm status Ar string
-Status of request. Is set to
-.Dq Success.
-in case the operation succeeded, in an error description otherwise.
+Human-readable status. If the certificate request failed, it contains the error description.
+.It Cm is_success Ar boolean
+True if the certificate request is successful.
 .El
 .El
 .Sh FILES
@@ -432,9 +432,9 @@ args = [
     "-f", "noreply.certs@example.net",
     "contact@example.net"
 ]
-stdin = """Subject: Certificate renewal alert for {{domains.[0]}}
+stdin = """Subject: Certificate renewal {{#if is_success}}succeeded{{else}}failed{{/if}} for {{domains.[0]}}
 
-The following certificate has been renewed.
+The following certificate has {{#unless is_success}}*not* {{/if}}been renewed.
 domains: {{#each domains}}{{#if @index}}, {{/if}}{{this}}{{/each}}
 algorithm: {{algorithm}}
 status: {{status}}"""