Refine suppression list to include only affected recipients (#339)

apps/web/src/server/service/ses-hook-parser.ts

@@ -115,12 +115,28 @@ export async function parseSesHook(data: SesEvent) {
     mailStatus === EmailStatus.BOUNCED &&
     (mailData as SesBounce).bounceType === "Permanent";
 
+  // Fix: Only add the actual bounced/complained recipients to suppression list
   // Add emails to suppression list for hard bounces and complaints
   if (isHardBounced || mailStatus === EmailStatus.COMPLAINED) {
     logger.info("Adding emails to suppression list");
 
-    const recipientEmails = Array.isArray(email.to) ? email.to : [email.to];
+    // Get the actual affected recipients from the event data
+    let recipientEmails: string[] = [];
     
+    if (isHardBounced && data.bounce?.bouncedRecipients) {
+      // For bounces, only add the recipients that actually bounced
+      recipientEmails = data.bounce.bouncedRecipients.map(
+        (recipient) => recipient.emailAddress
+      );
+    } else if (mailStatus === EmailStatus.COMPLAINED && data.complaint?.complainedRecipients) {
+      // For complaints, only add the recipients that actually complained
+      recipientEmails = data.complaint.complainedRecipients.map(
+        (recipient) => recipient.emailAddress
+      );
+    }
+
+    // Only proceed if we have affected recipients
+    if (recipientEmails.length > 0) {
       try {
         await Promise.all(
           recipientEmails.map((recipientEmail) =>
@@ -154,6 +170,15 @@ export async function parseSesHook(data: SesEvent) {
         );
         // Don't throw error - continue processing the webhook
       }
+    } else {
+      logger.warn(
+        {
+          emailId: email.id,
+          eventType: data.eventType,
+        },
+        "No affected recipients found in bounce/complaint event data",
+      );
+    }
   }
 
   if (