diff --git a/.changeset/login-email-otp-letters.md b/.changeset/login-email-otp-letters.md
new file mode 100644
index 0000000..dadb7f4
--- /dev/null
+++ b/.changeset/login-email-otp-letters.md
@@ -0,0 +1,5 @@
+---
+"seamless-cli": patch
+---
+
+Fix `seamless login` rejecting valid email OTP codes. Email OTPs are six letters, but the code prompt only accepted digits, so no real email code could be entered. The prompt is now channel-aware: it accepts a six-letter code (case-insensitive, normalized to uppercase) for email logins and a numeric code for phone logins, with matching placeholder text.
diff --git a/src/commands/login.test.ts b/src/commands/login.test.ts
index 9d7deb9..04ecb1d 100644
--- a/src/commands/login.test.ts
+++ b/src/commands/login.test.ts
@@ -256,7 +256,7 @@ describe("runLogin: success", () => {
     expect(out.some((l) => l.includes("A code was sent to dev@example.com."))).toBe(true);
   });
 
-  it("validates the code prompt input", async () => {
+  it("validates the code prompt input as letters for an email login", async () => {
     mockRouter({
       "/login": [
         () => json({ token: "e1", identifierType: "email", loginMethods: ["email_otp"] }),
@@ -264,15 +264,55 @@ describe("runLogin: success", () => {
       "/otp/generate-login-email-otp": [() => json({ message: "sent" })],
       "/otp/verify-login-email-otp": [() => json({ token: "a", refreshToken: "r" })],
     });
-    vi.mocked(text).mockResolvedValueOnce("dev@example.com").mockResolvedValueOnce("123456");
+    vi.mocked(text).mockResolvedValueOnce("dev@example.com").mockResolvedValueOnce("ABCDEF");
+
+    await runLogin([]);
+
+    const codeCall = vi.mocked(text).mock.calls[1][0] as {
+      placeholder: string;
+      validate: (v: string) => string | undefined;
+    };
+    expect(codeCall.placeholder).toBe("ABCDEF");
+    expect(codeCall.validate("ABCDEF")).toBeUndefined();
+    expect(codeCall.validate("abcdef")).toBeUndefined();
+    expect(codeCall.validate("123456")).toMatch(/6-letter code/);
+  });
+
+  it("uppercases a lowercase email code before verifying", async () => {
+    const calls = mockRouter({
+      "/login": [
+        () => json({ token: "e1", identifierType: "email", loginMethods: ["email_otp"] }),
+      ],
+      "/otp/generate-login-email-otp": [() => json({ message: "sent" })],
+      "/otp/verify-login-email-otp": [() => json({ token: "a", refreshToken: "r" })],
+    });
+    vi.mocked(text).mockResolvedValueOnce("dev@example.com").mockResolvedValueOnce("abcdef");
+
+    await runLogin([]);
+
+    const verify = calls.find((c) => c.url.endsWith("/otp/verify-login-email-otp"))!;
+    expect(verify.init.body).toBe(JSON.stringify({ verificationToken: "ABCDEF" }));
+  });
+
+  it("validates the code prompt input as digits for a phone login", async () => {
+    mockRouter({
+      "/login": [
+        () => json({ token: "e1", identifierType: "phone", loginMethods: ["phone_otp"] }),
+      ],
+      "/otp/generate-login-phone-otp": [() => json({ message: "sent" })],
+      "/otp/verify-login-phone-otp": [() => json({ token: "a", refreshToken: "r" })],
+    });
+    vi.mocked(text).mockResolvedValueOnce("+15555550100").mockResolvedValueOnce("123456");
 
     await runLogin([]);
 
     const codeCall = vi.mocked(text).mock.calls[1][0] as {
+      placeholder: string;
       validate: (v: string) => string | undefined;
     };
+    expect(codeCall.placeholder).toBe("123456");
     expect(codeCall.validate("123456")).toBeUndefined();
-    expect(codeCall.validate("abc")).toMatch(/numeric code/);
+    expect(codeCall.validate("ABCDEF")).toMatch(/numeric code/);
   });
 
   it("validates the identifier prompt input", async () => {
diff --git a/src/commands/login.ts b/src/commands/login.ts
index ad14802..1068571 100644
--- a/src/commands/login.ts
+++ b/src/commands/login.ts
@@ -41,17 +41,26 @@ export async function runLogin(args: string[]): Promise<void> {
     const result = await completeLogin({
       instanceUrl: profile.instanceUrl,
       identifier,
-      getCode: async ({ resent }) => {
+      getCode: async ({ resent, channel }) => {
+        const email = channel === "email";
         const answer = await text({
           message: resent ? "Enter the new code" : "Enter the code we sent you",
-          placeholder: "123456",
-          validate: (value) =>
-            /^\d{4,8}$/.test((value ?? "").trim())
+          placeholder: email ? "ABCDEF" : "123456",
+          validate: (value) => {
+            const code = (value ?? "").trim();
+            if (email) {
+              return /^[A-Za-z]{6}$/.test(code)
+                ? undefined
+                : "Enter the 6-letter code from the email.";
+            }
+            return /^\d{4,8}$/.test(code)
               ? undefined
-              : "Enter the numeric code from the message",
+              : "Enter the numeric code from the message.";
+          },
         });
         if (isCancel(answer)) return null;
-        return (answer as string).trim();
+        const code = (answer as string).trim();
+        return email ? code.toUpperCase() : code;
       },
       notify: (event) => {
         switch (event.type) {
diff --git a/src/core/loginFlow.test.ts b/src/core/loginFlow.test.ts
index 39ad6af..5c93f58 100644
--- a/src/core/loginFlow.test.ts
+++ b/src/core/loginFlow.test.ts
@@ -90,6 +90,26 @@ describe("completeLogin", () => {
     expect(verify.init.body).toBe(JSON.stringify({ verificationToken: "123456" }));
   });
 
+  it("passes the channel to getCode so the prompt can validate accordingly", async () => {
+    mockRouter({
+      "/login": [() => json({ token: "e1", identifierType: "phone" })],
+      "/otp/generate-login-phone-otp": [() => json({ message: "sent" })],
+      "/otp/verify-login-phone-otp": [() => json({ token: "a", refreshToken: "r" })],
+    });
+
+    let seenChannel: string | undefined;
+    await completeLogin({
+      instanceUrl: INSTANCE,
+      identifier: "+15555550100",
+      getCode: async ({ channel }) => {
+        seenChannel = channel;
+        return "123456";
+      },
+    });
+
+    expect(seenChannel).toBe("phone");
+  });
+
   it("retries a rejected code, then succeeds", async () => {
     mockRouter({
       "/login": [
diff --git a/src/core/loginFlow.ts b/src/core/loginFlow.ts
index 4aab524..c0c358d 100644
--- a/src/core/loginFlow.ts
+++ b/src/core/loginFlow.ts
@@ -32,7 +32,11 @@ export interface CompleteLoginOptions {
   identifier: string;
   maxAttempts?: number;
   now?: () => number;
-  getCode: (ctx: { attempt: number; resent: boolean }) => Promise<string | null>;
+  getCode: (ctx: {
+    attempt: number;
+    resent: boolean;
+    channel: LoginChannel;
+  }) => Promise<string | null>;
   notify?: (event: LoginEvent) => void;
 }
 
@@ -204,7 +208,7 @@ export async function completeLogin(
   let attempt = 0;
   let resent = false;
   while (attempt < maxAttempts) {
-    const code = await opts.getCode({ attempt: attempt + 1, resent });
+    const code = await opts.getCode({ attempt: attempt + 1, resent, channel });
     resent = false;
     if (code === null) return null;