diff --git a/src/index.ts b/src/index.ts
index 1828834..4908444 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -7,7 +7,7 @@ require('dotenv').config()
 
 const bot = new Telegraf(process.env.TELEGRAM_BOT_TOKEN);
 
-const POLLING_TIMEOUT = 30
+const POLLING_TIMEOUT = process.env.POLLING_TIMEOUT
 
 const MARK_STRING = process.env.MARK_STRING
 
@@ -36,7 +36,7 @@ const main = async () => {
         source: true
       })) {
 
-      if (message.envelope.subject === MARK_STRING) {
+      if (message.envelope.subject.includes(MARK_STRING)) {
         let email = Buffer.from(message.source).toString()
         const parsed = await simpleParser(email)
         console.log('📌', chalk.cyan('Message:'), chalk.yellow(parsed.text));
@@ -49,7 +49,7 @@ const main = async () => {
 
         client.messageFlagsAdd(message.seq.toString(), ['\\Seen'])
           .then((result: any) => console.log('📌', chalk.cyan(`Set seen flag for id-${message.seq}`), result))
-          .catch((error: any) => console.log(error))
+          .catch(console.error)
       }
     }
 
@@ -65,5 +65,5 @@ const main = async () => {
 //main().then().catch(err => console.error(err)); // start once for development
 
 setInterval(async () => {
-  main().then().catch(err => console.error(err));
-}, POLLING_TIMEOUT * 1000)
+  main().then().catch(console.error);
+}, Number(POLLING_TIMEOUT) * 1000)