fix(core): update

ts/smartmail.classes.emailaddressvalidator.ts

@@ -0,0 +1,19 @@
+import * as plugins from './smartmail.plugins';
+
+export interface IEmailValidationResult {
+  valid: boolean;
+  reason: string;
+}
+
+export class EmailAddressValidator {
+  public smartdns = new plugins.smartdns.Smartdns({});
+
+  public async validate(emailArg: string): Promise<IEmailValidationResult> {
+    const emailArray = emailArg.split('@');
+    const result = await this.smartdns.getRecord(emailArray[1], 'MX');
+    return {
+      valid: !!result,
+      reason: 'todo'
+    };
+  }
+}