Retry Resend calls on 429 and throttle Newsletter Archive lookups; v2.7.1

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server/email.js

@@ -84,6 +84,19 @@ export async function sendResendEmailWithRetry({ resend, payload, context, maxAt
   throw lastError ?? new Error(`[${context}] email send failed`)
 }
 
+// Retry a Resend SDK call when the account's rate limit (429) is hit. The SDK returns { error } rather than throwing.
+export async function resendRetry(call, maxAttempts = 5) {
+  let result
+  for (let attempt = 0; attempt < maxAttempts; attempt += 1) {
+    result = await call()
+    const err = result?.error
+    const limited = err && (err.statusCode === 429 || err.name === 'rate_limit_exceeded')
+    if (!limited) return result
+    await new Promise(resolve => setTimeout(resolve, 1000 * 2 ** attempt))
+  }
+  return result
+}
+
 export async function syncContactToResend(name, email) {
   if (!process.env.RESEND_API_KEY) return
   const { firstName, lastName } = splitName(name)
@@ -91,19 +104,19 @@ export async function syncContactToResend(name, email) {
   try {
     // Never touch `unsubscribed` for a contact that already exists — otherwise a form submission
     // would silently resubscribe someone who opted out in Resend.
-    const { data: existing } = await contactResend.contacts.get({ email })
+    const { data: existing } = await resendRetry(() => contactResend.contacts.get({ email }))
     if (existing) {
-      const { error: updateError } = await contactResend.contacts.update({ email, firstName, lastName })
+      const { error: updateError } = await resendRetry(() => contactResend.contacts.update({ email, firstName, lastName }))
       if (updateError) console.error('[resend] contact sync error:', updateError)
       return
     }
-    const { error: createError } = await contactResend.contacts.create({
+    const { error: createError } = await resendRetry(() => contactResend.contacts.create({
       email,
       firstName,
       lastName,
       unsubscribed: false,
       ...(process.env.RESEND_SEGMENT_ID ? { segments: [{ id: process.env.RESEND_SEGMENT_ID }] } : {}),
-    })
+    }))
     if (createError) console.error('[resend] contact sync error:', createError)
   } catch (err) {
     console.error('[resend] contact sync exception:', err)