feat(tem): add troubleshooting index (#4630)

Author: ldecarvalho-doc

pages/transactional-email/troubleshooting/index.mdx

@@ -1,8 +1,60 @@
 ---
 meta:
   title: Transactional Email - Troubleshooting
-  description: Troubleshoot common issues with Scaleway Transactional Email.
+  description: Find troubleshooting resources for resolving issues with Transactional Email.
 content:
-  h1: Transactional Email - Troubleshooting
-  paragraph: Troubleshoot common issues with Scaleway Transactional Email.
+  paragraph: Find troubleshooting resources for resolving issues with Transactional Email.
+dates:
+  posted: 2025-03-17
+categories:
+  - transactional-email
 ---
+
+<ProductHeader
+  productName="Transactional Email troubleshooting"
+  productLogo="transactionalEmail"
+  description="Discover how to solve the most common issues in Scaleway Transactional Email."
+/>
+
+## Featured Pages
+
+<Grid>
+    <DefaultCard
+      title="Transactional Email FAQ"
+      description="General info on Transactional Email"
+      url="/faq/transactional-email/"
+      label="See more"
+    />
+    <DefaultCard
+      title="Transactional Email capabilities and limits"
+      description="Limitations of Scaleway TEM"
+      url="/transactional-email/reference-content/tem-capabilities-and-limits/"
+      label="See more"
+    />
+    <DefaultCard
+      title="Setting up SMTP"
+      description="Guide to configure SMTP on TEM"
+      url="/transactional-email/reference-content/smtp-configuration/"
+      label="See more"
+    />
+</Grid>
+<Grid>
+    <DefaultCard
+      title="Understanding your domain reputation score"
+      description="Tips to protect domain reputation"
+      url="/transactional-email/reference-content/understanding-tem-reputation-score/"
+      label="See more"
+    />
+    <DefaultCard
+      title="Protecting your domain's reputation with progressive emailing"
+      description="How Scaleway protects your domain's reputation"
+      url="/transactional-email/reference-content/protecting-your-domain-reputation/"
+      label="See more"
+    />
+</Grid>
+
+## Transactional Email troubleshooting pages
+
+- [Getting delisted from Spamhaus](/transactional-email/troubleshooting/delist-domain)
+
+