diff --git a/.env.example b/.env.example
index 47af96aa..3ade6c84 100644
--- a/.env.example
+++ b/.env.example
@@ -33,7 +33,6 @@ ADMIN_EMAIL=
 # Direct phone-call visibility
 PHONE_AGENT_INTERNAL_TOKEN=
 PHONE_CALL_SUMMARY_FROM_EMAIL=
-RESEND_API_KEY=
 
 # Placeholder for a later LiveKit rollout
 LIVEKIT_URL=
diff --git a/.env.staging.example b/.env.staging.example
index 01fb56dc..4c1ec233 100644
--- a/.env.staging.example
+++ b/.env.staging.example
@@ -13,7 +13,6 @@ ADMIN_EMAIL=
 
 PHONE_AGENT_INTERNAL_TOKEN=
 PHONE_CALL_SUMMARY_FROM_EMAIL=
-RESEND_API_KEY=
 
 USESEND_API_KEY=
 USESEND_BASE_URL=
diff --git a/lib/email.ts b/lib/email.ts
index c9fbcaa5..96cf2a0b 100644
--- a/lib/email.ts
+++ b/lib/email.ts
@@ -46,15 +46,19 @@ export async function sendTransactionalEmail({
   subject,
   html,
   replyTo,
+  from,
 }: {
   to: string;
   subject: string;
   html: string;
   replyTo?: string;
+  from?: string;
 }) {
+  const sender = from || FROM_EMAIL;
+
   if (usesend) {
     return usesend.emails.send({
-      from: FROM_EMAIL,
+      from: sender,
       to,
       subject,
       html,
@@ -65,7 +69,7 @@ export async function sendTransactionalEmail({
   if (sesClient) {
     return sesClient.send(
       new SendEmailCommand({
-        FromEmailAddress: FROM_EMAIL,
+        FromEmailAddress: sender,
         Destination: {
           ToAddresses: [to],
         },
diff --git a/lib/phone-calls.ts b/lib/phone-calls.ts
index 36b2515a..27a05d6d 100644
--- a/lib/phone-calls.ts
+++ b/lib/phone-calls.ts
@@ -1,4 +1,5 @@
 import { businessConfig } from "@/lib/seo-config";
+import { isEmailConfigured, sendTransactionalEmail } from "@/lib/email";
 
 export type AdminPhoneCallTurn = {
   id: string;
@@ -132,15 +133,14 @@ export async function sendPhoneCallSummaryEmail(args: {
   detail: AdminPhoneCallDetail;
   adminUrl: string;
 }) {
-  const resendApiKey = String(process.env.RESEND_API_KEY || "").trim();
   const adminEmail = String(process.env.ADMIN_EMAIL || "").trim().toLowerCase();
   const fromEmail = String(process.env.PHONE_CALL_SUMMARY_FROM_EMAIL || "").trim();
 
-  if (!adminEmail || !resendApiKey || !fromEmail) {
+  if (!adminEmail || !fromEmail || !isEmailConfigured()) {
     const missing = [
       !adminEmail ? "ADMIN_EMAIL" : null,
-      !resendApiKey ? "RESEND_API_KEY" : null,
       !fromEmail ? "PHONE_CALL_SUMMARY_FROM_EMAIL" : null,
+      !isEmailConfigured() ? "email transport" : null,
     ].filter(Boolean);
 
     return {
@@ -154,60 +154,61 @@ export async function sendPhoneCallSummaryEmail(args: {
   const callerNumber = normalizePhoneFromIdentity(args.detail.call.participantIdentity) || "Unknown caller";
   const statusLabel = args.detail.call.callStatus.toUpperCase();
 
-  const text = [
-    `Rocky Mountain Vending phone call summary`,
-    ``,
-    `Caller: ${callerNumber}`,
-    `Started: ${formatPhoneCallTimestamp(args.detail.call.startedAt)}`,
-    `Duration: ${formatPhoneCallDuration(args.detail.call.durationMs)}`,
-    `Call status: ${statusLabel}`,
-    `Jessica answered: ${args.detail.call.answered ? "Yes" : "No"}`,
-    `Lead outcome: ${args.detail.call.leadOutcome}`,
-    `Handoff requested: ${args.detail.call.handoffRequested ? "Yes" : "No"}`,
-    `Recording status: ${args.detail.call.recordingStatus || "Unavailable"}`,
-    args.detail.call.recordingUrl ? `Recording URL: ${args.detail.call.recordingUrl}` : `Recording URL: Not available in RMV admin`,
-    `Summary: ${summaryText}`,
-    `Admin call detail: ${callUrl}`,
-    args.detail.linkedLead?.id ? `Linked lead: ${args.detail.linkedLead.id}` : `Linked lead: None`,
-    ``,
-    `Recent transcript:`,
-    ...args.detail.turns.slice(-6).map((turn) => `${turn.role}: ${turn.text}`),
-  ].join("\n");
+  const transcriptHtml = args.detail.turns
+    .slice(-6)
+    .map((turn) => {
+      const role = turn.role.replace(/[<>&"]/g, "");
+      const text = turn.text
+        .replace(/&/g, "&amp;")
+        .replace(/</g, "&lt;")
+        .replace(/>/g, "&gt;");
 
-  const response = await fetch("https://api.resend.com/emails", {
-    method: "POST",
-    headers: {
-      Authorization: `Bearer ${resendApiKey}`,
-      "Content-Type": "application/json",
-    },
-    body: JSON.stringify({
+      return `<li><strong>${role}:</strong> ${text}</li>`;
+    })
+    .join("");
+
+  const html = `
+    <div style="font-family: Arial, sans-serif; color: #111827; line-height: 1.6;">
+      <h1 style="font-size: 20px; margin-bottom: 16px;">Rocky Mountain Vending phone call summary</h1>
+      <p><strong>Caller:</strong> ${callerNumber}</p>
+      <p><strong>Started:</strong> ${formatPhoneCallTimestamp(args.detail.call.startedAt)}</p>
+      <p><strong>Duration:</strong> ${formatPhoneCallDuration(args.detail.call.durationMs)}</p>
+      <p><strong>Call status:</strong> ${statusLabel}</p>
+      <p><strong>Jessica answered:</strong> ${args.detail.call.answered ? "Yes" : "No"}</p>
+      <p><strong>Lead outcome:</strong> ${args.detail.call.leadOutcome}</p>
+      <p><strong>Handoff requested:</strong> ${args.detail.call.handoffRequested ? "Yes" : "No"}</p>
+      <p><strong>Recording status:</strong> ${args.detail.call.recordingStatus || "Unavailable"}</p>
+      <p><strong>Recording URL:</strong> ${
+        args.detail.call.recordingUrl
+          ? `<a href="${args.detail.call.recordingUrl}">${args.detail.call.recordingUrl}</a>`
+          : "Not available in RMV admin"
+      }</p>
+      <p><strong>Summary:</strong> ${summaryText}</p>
+      <p><strong>Admin call detail:</strong> <a href="${callUrl}">${callUrl}</a></p>
+      <p><strong>Linked lead:</strong> ${args.detail.linkedLead?.id || "None"}</p>
+      <h2 style="font-size: 16px; margin-top: 24px;">Recent transcript</h2>
+      <ul>${transcriptHtml || "<li>No transcript turns were captured.</li>"}</ul>
+    </div>
+  `;
+
+  try {
+    await sendTransactionalEmail({
       from: fromEmail,
-      to: [adminEmail],
+      to: adminEmail,
       subject: `[RMV Phone] ${statusLabel} call from ${callerNumber}`,
-      text,
-    }),
-  });
-
-  const body = (await response.json().catch(() => ({}))) as { message?: string; error?: unknown };
-
-  if (!response.ok) {
-    const errorText =
-      typeof body?.message === "string"
-        ? body.message
-        : typeof body?.error === "string"
-          ? body.error
-          : `Resend request failed with status ${response.status}.`;
+      html,
+    });
 
+    return {
+      status: "sent" as const,
+      error: undefined,
+    };
+  } catch (error) {
     return {
       status: "failed" as const,
-      error: errorText,
+      error: error instanceof Error ? error.message : "Failed to send phone call summary email.",
     };
   }
-
-  return {
-    status: "sent" as const,
-    error: undefined,
-  };
 }
 
 export function buildFallbackPhoneCallUrl(callId: string) {