Updated text

app/src/main/res/values/strings.xml

@@ -918,7 +918,7 @@
     <string name="title_advanced_sender_regex">Regex to match username of incoming email addresses</string>
     <string name="title_identity_reply_to">Reply to address</string>
     <string name="title_identity_internal">Internal domain names (comma separated)</string>
-    <string name="title_identity_unicode">Use Unicode transport</string>
+    <string name="title_identity_unicode">Allow UTF-8 in message headers</string>
     <string name="title_identity_unicode_remark">Most servers do not support this</string>
     <string name="title_identity_octetmime">Allow 8BITMIME</string>
     <string name="title_identity_max_size">Maximum message size (MB)</string>