diff --git a/Classes/Configuration.php b/Classes/Configuration.php
index e62c795..ba339c9 100644
--- a/Classes/Configuration.php
+++ b/Classes/Configuration.php
@@ -23,7 +23,7 @@ public function __construct()
         try {
             $settings = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get('sent_mails');
 
-            $this->rejectBySearchTerms = GeneralUtility::trimExplode('|', $settings['rejectBySearchTerms'] ?? '', true);
+            $this->rejectBySearchTerms = GeneralUtility::trimExplode('###', $settings['rejectBySearchTerms'] ?? '', true);
             $this->mailAPIUsername = $settings['mailAPIUsername'] ?? '';
             $this->mailAPIPassword = $settings['mailAPIPassword'] ?? '';
         } catch (\Exception $e) {
diff --git a/Readme.md b/Readme.md
index 6ab782f..26baf42 100644
--- a/Readme.md
+++ b/Readme.md
@@ -7,6 +7,9 @@ Using a dedicated backend module a user can:
 * resend the mail
 * forward the mail to a different email address
 * reject mails with a specific content
+* send a test email
+
+![module.png](Resources/Public/Screenshots/module.png)
 
 ## Installation
 
@@ -16,7 +19,18 @@ This extension requires the usage of composer!
 composer req studiomitte/sent-mails
 ```
 
-## Mail-Information API
+## Features
+
+### Reject sending mails
+
+The extension provides a simple way to reject sending mails with a specific content. This can be useful to prevent sending mails to special email addresses.
+The current use case is to skip sending mails triggered by frontend tests which use a specific email address like `cypress+1709191116@domain.tld`.
+
+The regex searchwords can be configured in the extension settings with e.g. `cypress\+[\._a-zA-Z0-9-]+@domain\.tld'`.
+
+### Mail-Information API
 
 Calling `/api/mailinformation?search=somecontent` will return a status information about the sent mails. Basic auth needs to be configured in the extension settings.
+It only allows to retrieve the information of mails sent in the last 60 seconds
 
+In combination with the feature "Reject sending mails" this can be used to check if a mail would have been sent or not.
diff --git a/Resources/Public/Screenshots/module.png b/Resources/Public/Screenshots/module.png
new file mode 100644
index 0000000..6b51936
Binary files /dev/null and b/Resources/Public/Screenshots/module.png differ
diff --git a/composer.json b/composer.json
index 00490ef..013941b 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
     "TYPO3",
     "extension",
     "backend",
-    "search"
+    "mail"
   ],
   "authors": [
     {