diff --git a/src/PhpImap/DataPartInfo.php b/src/PhpImap/DataPartInfo.php
index 2bb51dfb..68841016 100644
--- a/src/PhpImap/DataPartInfo.php
+++ b/src/PhpImap/DataPartInfo.php
@@ -85,23 +85,23 @@ public function fetch(): string
             $this->data = Imap::fetchbody($this->mail->getImapStream(), $this->id, $this->part, $this->options);
         }
 
-        return $this->decodeAfterFetch();
+        return $this->decodeAfterFetch($this->data);
     }
 
-    protected function decodeAfterFetch(): string
+    public function decodeAfterFetch(string $data): string
     {
         switch ($this->encoding) {
             case ENC8BIT:
-                $this->data = \imap_utf8((string) $this->data);
+                $this->data = \imap_utf8((string) $data);
                 break;
             case ENCBINARY:
-                $this->data = \imap_binary((string) $this->data);
+                $this->data = \imap_binary((string) $data);
                 break;
             case ENCBASE64:
-                $this->data = \base64_decode((string) $this->data, false);
+                $this->data = \base64_decode((string) $data, false);
                 break;
             case ENCQUOTEDPRINTABLE:
-                $this->data = \quoted_printable_decode((string) $this->data);
+                $this->data = \quoted_printable_decode((string) $data);
                 break;
         }
 
@@ -114,6 +114,11 @@ protected function convertEncodingAfterFetch(): string
             $this->data = $this->mail->decodeMimeStr(
                 (string) $this->data // Data to convert
             );
+
+            $this->data = $this->mail->convertToUtf8(
+                $this->data,
+                $this->charset
+            );
         }
 
         return (null === $this->data) ? '' : $this->data;
diff --git a/tests/unit/Fixtures/DataPartInfo.php b/tests/unit/Fixtures/DataPartInfo.php
index 367e6942..7f012827 100644
--- a/tests/unit/Fixtures/DataPartInfo.php
+++ b/tests/unit/Fixtures/DataPartInfo.php
@@ -8,9 +8,12 @@
 
 class DataPartInfo extends Base
 {
+    /** @var string|null */
+    protected $data;
+
     public function fetch(): string
     {
-        return $this->decodeAfterFetch();
+        return $this->decodeAfterFetch($this->data);
     }
 
     public function setData(string $data = null): void
diff --git a/tests/unit/LiveMailboxStringDecodingConvertingTest.php b/tests/unit/LiveMailboxStringDecodingConvertingTest.php
new file mode 100644
index 00000000..5025a4ab
--- /dev/null
+++ b/tests/unit/LiveMailboxStringDecodingConvertingTest.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * Live Mailbox - PHPUnit tests.
+ *
+ * Runs tests on a live mailbox
+ *
+ * @author Sebi94nbg
+ */
+declare(strict_types=1);
+
+namespace PhpImap;
+
+use const ENCQUOTEDPRINTABLE;
+use Generator;
+use PHPUnit\Framework\TestCase;
+
+class LiveMailboxStringDecodingConvertingTest extends TestCase
+{
+    /**
+     * Provides data for testing string decoding.
+     */
+    public function stringDecodeProvider(): Generator
+    {
+        yield 'Issue #250 iso-8859-1' => [
+            ENCQUOTEDPRINTABLE,
+            'iso-8859-1',
+            'mountainguan',
+            'mountainguan',
+            'e94a37111edb29a8d3f6078dc4810953964f19562613cf2bd15e21b69d30822a',
+        ];
+
+        yield 'Issue #250 utf-7' => [
+            ENCQUOTEDPRINTABLE,
+            'utf-7',
+            '+bUuL1Q-',
+            '测试',
+            '6aa8f49cc992dfd75a114269ed26de0ad6d4e7d7a70d9c8afb3d7a57a88a73ed',
+        ];
+
+        yield 'Issue #250 utf-7 with chinese' => [
+            ENCQUOTEDPRINTABLE,
+            'utf-7',
+            'mountainguan+bUuL1Q-',
+            'mountainguan测试',
+            '62a5022b682b7e02bda8d18424fa06501cdd71cce2832e95129673f63da2e177',
+        ];
+
+        yield 'Issue #250 utf-8 with chinese' => [
+            ENCQUOTEDPRINTABLE,
+            'utf-8',
+            'mountainguan=E6=B5=8B=E8=AF=95',
+            'mountainguan测试',
+            '62a5022b682b7e02bda8d18424fa06501cdd71cce2832e95129673f63da2e177',
+        ];
+
+        yield 'Issue #657' => [
+            ENCQUOTEDPRINTABLE,
+            'iso-8859-2',
+            '=EC=B9=E8=F8=BE=FD=E1=ED=E9',
+            'ěščřžýáíé',
+            'a05e42c7e14de716cd501e135f3f5e49545f71069de316a1e9f7bb153f9a7356',
+        ];
+
+        yield 'Emoji utf-8' => [
+            ENCQUOTEDPRINTABLE,
+            'utf-8',
+            'Some subject here =F0=9F=98=98',
+            'Some subject here 😘',
+            'da66c62e7e82316b8b543f52f1ecc4415c4dc93bc87e2239ee5f98bdf00a8c50',
+        ];
+    }
+
+    /**
+     * Test that string decoding and converting works as expected.
+     *
+     * @dataProvider stringDecodeProvider
+     */
+    public function testStringDecode(int $encoding, string $charset, string $iso_8859_2, string $utf8, string $sha256): void
+    {
+        $mailbox = new Mailbox('', '', '');
+
+        $dataInfo = new DataPartInfo($mailbox, 1337, '', $encoding, 0);
+        $dataInfo->charset = $charset;
+
+        $decoded = $dataInfo->decodeAfterFetch($iso_8859_2);
+
+        $this->assertSame($utf8, $decoded);
+
+        $this->assertSame($sha256, \hash('sha256', $decoded));
+    }
+}