diff --git a/src/index.ts b/src/index.ts
index e7b27ea..8324fd7 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -32,7 +32,7 @@ export async function validate(emailOrOptions: string | ValidatorOptions): Promi
     const mx = await getBestMx(domain)
     if (!mx) return createOutput('mx', 'MX record not found')
     if (options.validateSMTP) {
-      return checkSMTP(options.sender, email, mx.exchange)
+      return checkSMTP(options.sender, email, mx.exchange, options.port, options.timeout)
     }
   }
 
diff --git a/src/options/options.ts b/src/options/options.ts
index 1fb46ce..561e512 100644
--- a/src/options/options.ts
+++ b/src/options/options.ts
@@ -1,6 +1,8 @@
 const defaultOptions: ValidatorOptionsFinal = {
   email: 'name@example.org',
   sender: 'name@example.org',
+  timeout: 10 * 1000,
+  port: 25,
   validateRegex: true,
   validateMx: true,
   validateTypo: true,
@@ -10,6 +12,8 @@ const defaultOptions: ValidatorOptionsFinal = {
 
 type Options = {
   sender: string
+  port: number
+  timeout: number
   validateRegex: boolean
   validateMx: boolean
   validateTypo: boolean
diff --git a/src/smtp/smtp.ts b/src/smtp/smtp.ts
index 9aeb07c..6e65dbc 100644
--- a/src/smtp/smtp.ts
+++ b/src/smtp/smtp.ts
@@ -8,12 +8,17 @@ const log = (...args: unknown[]) => {
   }
 }
 
-export const checkSMTP = async (sender: string, recipient: string, exchange: string): Promise<OutputFormat> => {
-  const timeout = 1000 * 10 // 10 seconds
+export const checkSMTP = async (
+  sender: string,
+  recipient: string,
+  exchange: string,
+  port: number,
+  timeout: number
+): Promise<OutputFormat> => {
   return new Promise(r => {
     let receivedData = false
     let closed = false
-    const socket = net.createConnection(25, exchange)
+    const socket = net.createConnection(port, exchange)
     socket.setEncoding('ascii')
     socket.setTimeout(timeout)
     socket.on('error', error => {