diff --git a/src/main/java/de/hs_mannheim/informatik/ct/controller/ContactTracingController.java b/src/main/java/de/hs_mannheim/informatik/ct/controller/ContactTracingController.java
index f3f445b8..1e9dd6f6 100644
--- a/src/main/java/de/hs_mannheim/informatik/ct/controller/ContactTracingController.java
+++ b/src/main/java/de/hs_mannheim/informatik/ct/controller/ContactTracingController.java
@@ -217,7 +217,7 @@ public static class TracingColumn {
      * @param type     String of the filter type (students/ staff/ guests)
      * @return filtered List of Contacts
      */
-    private List<Contact<?>> filterContactList(Collection<Contact<? extends Visit>> contacts, String type) {
+    private List<Contact<? extends Visit>> filterContactList(Collection<Contact<? extends Visit>> contacts, String type) {
         List<Contact<?>> filteredList = new ArrayList<>();
         for (Contact<? extends Visit> contact : contacts) {
             if (type.equals("students") && contact.getContact().getEmail().contains("@stud.hs-mannheim.de")) {
diff --git a/src/main/java/de/hs_mannheim/informatik/ct/controller/CtController.java b/src/main/java/de/hs_mannheim/informatik/ct/controller/CtController.java
index 1612426f..9fce4d7a 100644
--- a/src/main/java/de/hs_mannheim/informatik/ct/controller/CtController.java
+++ b/src/main/java/de/hs_mannheim/informatik/ct/controller/CtController.java
@@ -37,6 +37,7 @@
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 
+import de.hs_mannheim.informatik.ct.util.MailAddress;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.format.annotation.DateTimeFormat;
@@ -100,8 +101,12 @@ public class CtController {
     @Value("${hostname}")
     private String host;
 
+    @Value("${support_mail_address}")
+    private String supportMailAddress;
+
     @RequestMapping("/")
     public String home(Model model) {
+        model.addAttribute("supportMailAddress", MailAddress.parse(supportMailAddress));
         model.addAttribute("freeLearnerPlaces", roomVisitService.getRemainingStudyPlaces());
         return "index";
     }
@@ -335,6 +340,7 @@ public String showFaq(Model model) {
         ArrayList<String> questions = faqs.get("questions");
         model.addAttribute("questions", questions);
         model.addAttribute("answers", answers);
+        model.addAttribute("supportMailAddress", MailAddress.parse(supportMailAddress));
         return "faq";
     }
 
diff --git a/src/main/java/de/hs_mannheim/informatik/ct/controller/ErrorController.java b/src/main/java/de/hs_mannheim/informatik/ct/controller/ErrorController.java
index 7582a44e..749128f3 100644
--- a/src/main/java/de/hs_mannheim/informatik/ct/controller/ErrorController.java
+++ b/src/main/java/de/hs_mannheim/informatik/ct/controller/ErrorController.java
@@ -25,8 +25,10 @@
 import javax.servlet.RequestDispatcher;
 import javax.servlet.http.HttpServletRequest;
 
+import de.hs_mannheim.informatik.ct.util.MailAddress;
 import org.springframework.http.HttpStatus;
 import org.springframework.ui.Model;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -42,6 +44,11 @@
 @ControllerAdvice
 @Slf4j
 public class ErrorController {
+
+    @Value("${support_mail_address}")
+    private String supportMailAddress;
+
+
     @ExceptionHandler({RoomController.RoomNotFoundException.class})
     @ResponseStatus(value = HttpStatus.NOT_FOUND)
 //    @ResponseStatus(value = HttpStatus.NOT_FOUND, reason = "Room not found")
@@ -124,7 +131,7 @@ public String handleInvalidRoomPinException(Model model) {
     @RequestMapping("/error")
     @ResponseStatus(value = HttpStatus.BAD_REQUEST)
 //    @ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "error")
-    public String handleError(HttpServletRequest request) {
+    public String handleError(Model model, HttpServletRequest request) {
         Object status = request.getAttribute(RequestDispatcher.ERROR_STATUS_CODE);
         log.error("Request Status: {}", status);
 
@@ -135,17 +142,18 @@ public String handleError(HttpServletRequest request) {
             }
 
         }
+        model.addAttribute("supportMailAddress", MailAddress.parse(supportMailAddress));
         return "error";
     }
 
     @ExceptionHandler({Exception.class})
     @ResponseStatus(value = HttpStatus.BAD_REQUEST)
 //    @ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "unknown error")
-    public String anyException(Exception e) {
+    public String anyException(Model model, Exception e) {
         StringWriter sw = new StringWriter();
         e.printStackTrace(new PrintWriter(sw));
-        log.error(sw.toString()); 
-
+        log.error(sw.toString());
+        model.addAttribute("supportMailAddress", MailAddress.parse(supportMailAddress));
         return "error";
     }
 
diff --git a/src/main/java/de/hs_mannheim/informatik/ct/util/MailAddress.java b/src/main/java/de/hs_mannheim/informatik/ct/util/MailAddress.java
new file mode 100644
index 00000000..9ef6e8a8
--- /dev/null
+++ b/src/main/java/de/hs_mannheim/informatik/ct/util/MailAddress.java
@@ -0,0 +1,56 @@
+package de.hs_mannheim.informatik.ct.util;
+
+import de.hs_mannheim.informatik.ct.persistence.InvalidEmailException;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+import lombok.val;
+import lombok.var;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+@AllArgsConstructor @Getter
+@Slf4j
+public class MailAddress {
+    private String mailAddress;
+    private String name;
+    private String domain;
+    private String tld;
+
+    private static final String EMAIL_REGEX = "(.*)@(.*)\\.(.*)$";
+    private static final String DEFAULT_INVALID_MAIL = "invalid-email@invalid.org";
+
+    public static MailAddress parse(String mailAddress) {
+        val match = splitMailAddress(mailAddress);
+        val name = match.group(1);
+        val domain = match.group(2);
+        val tld = match.group(3);
+        return new MailAddress(mailAddress, name, domain, tld);
+    }
+
+    private static Matcher splitMailAddress(String mailAddress){
+        Matcher match = Pattern.compile(EMAIL_REGEX).matcher(mailAddress);
+        if(!match.matches()) {
+            match = Pattern.compile(EMAIL_REGEX).matcher(DEFAULT_INVALID_MAIL);
+            log.error("support mail address '"+mailAddress+"' is invalid");
+        }
+        return match;
+    }
+
+    private static List<String> split(String data, String delimiter){
+        return Arrays.asList(data.split(delimiter));
+    }
+
+    private static String joinWithoutLast(List<String> data, String glue){
+        String domain = data.get(0);
+        for(int i=1;i < data.size() - 1;i++){
+            domain += glue + data.get(i);
+        }
+        return domain;
+    }
+}
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index ff41255f..90227c47 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -4,6 +4,7 @@ server_env=dev
 allow_full_room_checkIn=true
 warning_for_full_room=false
 check_3G_status=false
+support_mail_address=ctt-admin@hs-mannheim.de
 
 spring.datasource.driverClassName=org.h2.Driver
 spring.datasource.url=jdbc:h2:./h2db/database;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;AUTO_RECONNECT=TRUE
diff --git a/src/main/resources/templates/error.html b/src/main/resources/templates/error.html
index 1aa5cc95..939ffacb 100644
--- a/src/main/resources/templates/error.html
+++ b/src/main/resources/templates/error.html
@@ -13,7 +13,7 @@
     <div>Es ist ein Fehler aufgetreten!</div>
       
     <div>Leider ist uns dieser Fehler nicht bekannt. Bitte melden Sie ihn an: 
-      <a href="#" class="crypted" data-name="ctt-admin" data-domain="hs-mannheim" data-tld="de"
+      <a href="#" class="crypted" th:data-name="${supportMailAddress.name}" th:data-domain="${supportMailAddress.domain}" th:data-tld="${supportMailAddress.tld}"
    	            onclick="window.location.href = 'mailto:' + this.dataset.name + '@' + this.dataset.domain + '.' + this.dataset.tld; return false;">
       </a>
    </div>
diff --git a/src/main/resources/templates/faq.html b/src/main/resources/templates/faq.html
index af25d55e..bd0ba2e1 100644
--- a/src/main/resources/templates/faq.html
+++ b/src/main/resources/templates/faq.html
@@ -28,7 +28,7 @@ <h4>Frequently Asked Questions</h4>
     </div>
     <div style="margin-top: 50px; margin-bottom: 100px;">
         Bei weiteren Fragen kontaktieren Sie uns gerne per E-Mail:
-        <a href="#" class="crypted" data-name="ctt-admin" data-domain="hs-mannheim" data-tld="de"
+        <a href="#" class="crypted" th:data-name="${supportMailAddress.name}" th:data-domain="${supportMailAddress.domain}" th:data-tld="${supportMailAddress.tld}"
            onclick="window.location.href = 'mailto:' + this.dataset.name + '@' + this.dataset.domain + '.' + this.dataset.tld; return false;">
         </a>
     </div>
diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 73934d72..ad859f3c 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -82,7 +82,7 @@ <h5>Ansprechpartner</h5>
    								</a>
                             </li>
                             <li>Bei Interesse an der Software oder Rückfragen dazu:
-                            	<a href="#" class="crypted" data-name="ctt-admin" data-domain="hs-mannheim" data-tld="de"
+                            	<a href="#" class="crypted" th:data-name="${supportMailAddress.name}" th:data-domain="${supportMailAddress.domain}" th:data-tld="${supportMailAddress.tld}"
    									onclick="window.location.href = 'mailto:' + this.dataset.name + '@' + this.dataset.domain + '.' + this.dataset.tld; return false;">
    								</a>
                             </li>