diff --git a/packages/contracts/src/__tests__/mail.test.ts b/packages/contracts/src/__tests__/mail.test.ts
index 22a4d78..ccef494 100644
--- a/packages/contracts/src/__tests__/mail.test.ts
+++ b/packages/contracts/src/__tests__/mail.test.ts
@@ -37,9 +37,11 @@ describe('mailAccountInputSchema', () => {
     expect(mailAccountInputSchema.safeParse({ kind: 'wecom', name: 'x', settings: {} }).success).toBe(false);
   });
 
-  it('轮询间隔下限 10 秒;地址必须是邮箱;kind 只认两种', () => {
-    expect(mailAccountInputSchema.safeParse({ kind: 'imap-smtp', name: 'a', address: 'a@b.c', pollIntervalSec: 5 }).success).toBe(false);
+  it('轮询间隔下限 10 秒;地址必须是带 TLD 的邮箱;kind 只认两种', () => {
+    expect(mailAccountInputSchema.safeParse({ kind: 'imap-smtp', name: 'a', address: 'a@b.com', pollIntervalSec: 5 }).success).toBe(false);
     expect(mailAccountInputSchema.safeParse({ kind: 'imap-smtp', name: 'a', address: 'not-mail' }).success).toBe(false);
+    // 漏了 TLD 的地址(sales@corp)是打字错误,在 API 边界就拦下 —— 别拖到 SMTP 才炸
+    expect(mailAccountInputSchema.safeParse({ kind: 'imap-smtp', name: 'a', address: 'sales@corp' }).success).toBe(false);
     expect(mailAccountInputSchema.safeParse({ kind: 'pop3', name: 'a' }).success).toBe(false);
     expect(MAIL_ACCOUNT_KINDS).toEqual(['imap-smtp', 'wecom']);
   });
@@ -55,10 +57,10 @@ describe('mailAccountViewSchema', () => {
 
 describe('mailSendInputSchema', () => {
   it('收件人至少一个、主题必填;附件默认空数组;requestedBy 必带 kind', () => {
-    const ok = mailSendInputSchema.safeParse({ to: ['a@b.c'], subject: 'hi', text: 'x', requestedBy: { kind: 'ops' } });
+    const ok = mailSendInputSchema.safeParse({ to: ['a@b.com'], subject: 'hi', text: 'x', requestedBy: { kind: 'ops' } });
     expect(ok.success).toBe(true);
     if (ok.success) expect(ok.data.attachments).toEqual([]);
     expect(mailSendInputSchema.safeParse({ to: [], subject: 'hi', text: 'x', requestedBy: { kind: 'ops' } }).success).toBe(false);
-    expect(mailSendInputSchema.safeParse({ to: ['a@b.c'], subject: 'hi', text: 'x' }).success).toBe(false);
+    expect(mailSendInputSchema.safeParse({ to: ['a@b.com'], subject: 'hi', text: 'x' }).success).toBe(false);
   });
 });
diff --git a/packages/contracts/src/mail.ts b/packages/contracts/src/mail.ts
index 1231f82..f1a552b 100644
--- a/packages/contracts/src/mail.ts
+++ b/packages/contracts/src/mail.ts
@@ -55,8 +55,7 @@ const accountCommon = {
 export const mailAccountInputSchema = z.discriminatedUnion('kind', [
   z.object({
     kind: z.literal('imap-smtp'),
-    /** zod 默认 email 正则要求顶级域至少两个字母(`.c` 会被拒);邮箱地址理应更宽 —— 改用 html5Email 正则 */
-    address: z.email({ pattern: z.regexes.html5Email }),
+    address: z.email(),
     ...accountCommon,
     settings: imapSmtpSettingsSchema.prefault({}),
     /** 只写不读:缺省 = 不改(与 LLM 密钥同款) */
@@ -179,9 +178,9 @@ export const mailSendInputSchema = z.object({
   accountId: z.string().optional(),
   /** 指定发件地址(channel 用):必须对上一个已启用账号,不静默回落 */
   from: z.string().optional(),
-  to: z.array(z.email({ pattern: z.regexes.html5Email })).min(1),
-  cc: z.array(z.email({ pattern: z.regexes.html5Email })).default([]),
-  bcc: z.array(z.email({ pattern: z.regexes.html5Email })).default([]),
+  to: z.array(z.email()).min(1),
+  cc: z.array(z.email()).default([]),
+  bcc: z.array(z.email()).default([]),
   subject: z.string().min(1),
   text: z.string().optional(),
   html: z.string().optional(),