diff --git a/views/smarty/admin/mailconfigcheck.tpl b/views/smarty/admin/mailconfigcheck.tpl
index a81790f..0960e5e 100644
--- a/views/smarty/admin/mailconfigcheck.tpl
+++ b/views/smarty/admin/mailconfigcheck.tpl
@@ -28,12 +28,14 @@
     <div class="col-12 col-md-6 col-lg-4 mb-4">
         <div>
             <label class="col-4 form-label" for="oxshops__oxsmtp">[{oxmultilang ident="SHOP_MAIN_SMTPSERVER"}]</label>
-            <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtp->fldmax_length}]" id="oxshops__oxsmtp" value="[{$shop->getFieldData('oxsmtp')}]" [{$readonly}]>
-        </div>
-        <div>
-            <label class="col-4 form-label" for="oxshops__oxsmtpuser">[{oxmultilang ident="SHOP_MAIN_SMTPUSER"}]</label>
-            <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtpuser->fldmax_length}]" id="oxshops__oxsmtpuser" value="[{$shop->getFieldData('oxsmtpuser')}]" [{$readonly}]>
+            <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtp->fldmax_length}]" id="oxshops__oxsmtp" value="[{$smtpHost}]" [{$readonly}]>
         </div>
+        [{block name="smtp_credentials"}]
+            <div>
+                <label class="col-4 form-label" for="oxshops__oxsmtpuser">[{oxmultilang ident="SHOP_MAIN_SMTPUSER"}]</label>
+                <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtpuser->fldmax_length}]" id="oxshops__oxsmtpuser" value="[{$smtpUser}]" [{$readonly}]>
+            </div>
+        [{/block}]
         <div>
             <label class="col-4 form-label" for="oxshops__oxinfoemail">[{oxmultilang ident="SHOP_MAIN_INFOEMAIL"}]</label>
             <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxinfoemail->fldmax_length}]" id="oxshops__oxinfoemail" value="[{$shop->getFieldData('oxinfoemail')}]" [{$readonly}]>
diff --git a/views/smarty/admin/smtpCheck.tpl b/views/smarty/admin/smtpCheck.tpl
index 0182e18..c78e6c5 100644
--- a/views/smarty/admin/smtpCheck.tpl
+++ b/views/smarty/admin/smtpCheck.tpl
@@ -43,14 +43,16 @@
                 <label class="col-4 form-label" for="oxshops__oxsmtp">[{oxmultilang ident="SHOP_MAIN_SMTPSERVER"}]</label>
                 <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtp->fldmax_length}]" id="oxshops__oxsmtp" name="smtpHost" value="[{if $smtpHost}][{$smtpHost}][{else}][{$shop->getFieldData('oxsmtp')}][{/if}]">
             </div>
-            <div>
-                <label class="col-4 form-label" for="oxshops__oxsmtpuser">[{oxmultilang ident="SHOP_MAIN_SMTPUSER"}]</label>
-                <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtpuser->fldmax_length}]" id="oxshops__oxsmtpuser" name="smtpUser" value="[{if $smtpUser}][{$smtpUser}][{else}][{$shop->getFieldData('oxsmtpuser')}][{/if}]">
-            </div>
-            <div>
-                <label class="col-4 form-label" for="oxshops__oxsmtppwd">[{oxmultilang ident="SHOP_MAIN_SMTPPASSWORD"}]</label>
-                <input type="password" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtppwd->fldmax_length}]" id="oxshops__oxsmtppwd" name="smtpPwd" value="[{if $smtpPwd}][{$smtpPwd}][{else}][{$shop->getFieldData('oxsmtppwd')}][{/if}]">
-            </div>
+            [{block name="smtp_credentials"}]
+                <div>
+                    <label class="col-4 form-label" for="oxshops__oxsmtpuser">[{oxmultilang ident="SHOP_MAIN_SMTPUSER"}]</label>
+                    <input type="text" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtpuser->fldmax_length}]" id="oxshops__oxsmtpuser" name="smtpUser" value="[{if $smtpUser}][{$smtpUser}][{else}][{$shop->getFieldData('oxsmtpuser')}][{/if}]">
+                </div>
+                <div>
+                    <label class="col-4 form-label" for="oxshops__oxsmtppwd">[{oxmultilang ident="SHOP_MAIN_SMTPPASSWORD"}]</label>
+                    <input type="password" class="col-7 editinput" size="35" maxlength="[{$shop->oxshops__oxsmtppwd->fldmax_length}]" id="oxshops__oxsmtppwd" name="smtpPwd" value="[{if $smtpPwd}][{$smtpPwd}][{else}][{$shop->getFieldData('oxsmtppwd')}][{/if}]">
+                </div>
+            [{/block}]
             <div>
                 <label class="col-4 form-label" for="sender">[{oxmultilang ident="D3_MAILCHECKER_SMTPCHECK_SENDER"}]</label>
                 <select name="from" class="col-7 editinput" id="sender">
diff --git a/views/twig/admin/mailConfigCheck.html.twig b/views/twig/admin/mailConfigCheck.html.twig
index 369f2d6..8923266 100644
--- a/views/twig/admin/mailConfigCheck.html.twig
+++ b/views/twig/admin/mailConfigCheck.html.twig
@@ -28,12 +28,14 @@
     <div class="col-12 col-md-6 col-lg-4 mb-4">
         <div>
             <label class="col-4 form-label" for="oxshops__oxsmtp">{{ translate({ ident: "SHOP_MAIN_SMTPSERVER" }) }}</label>
-            <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtp.fldmax_length }}" id="oxshops__oxsmtp" value="{{ shop.getFieldData('oxsmtp') }}" {{ readonly }}>
-        </div>
-        <div>
-            <label class="col-4 form-label" for="oxshops__oxsmtpuser">{{ translate({ ident: "SHOP_MAIN_SMTPUSER" }) }}</label>
-            <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtpuser.fldmax_length }}" id="oxshops__oxsmtpuser" value="{{ shop.getFieldData('oxsmtpuser') }}" {{ readonly }}>
+            <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtp.fldmax_length }}" id="oxshops__oxsmtp" value="{{ smtpHost }}" {{ readonly }}>
         </div>
+        {% block smtp_credentials %}
+            <div>
+                <label class="col-4 form-label" for="oxshops__oxsmtpuser">{{ translate({ ident: "SHOP_MAIN_SMTPUSER" }) }}</label>
+                <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtpuser.fldmax_length }}" id="oxshops__oxsmtpuser" value="{{ smtpUser }}" {{ readonly }}>
+            </div>
+        {% endblock %}
         <div>
             <label class="col-4 form-label" for="oxshops__oxinfoemail">{{ translate({ ident: "SHOP_MAIN_INFOEMAIL" }) }}</label>
             <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxinfoemail.fldmax_length }}" id="oxshops__oxinfoemail" value="{{ shop.getFieldData('oxinfoemail') }}" {{ readonly }}>
diff --git a/views/twig/admin/smtpCheck.html.twig b/views/twig/admin/smtpCheck.html.twig
index 8cfc60b..168668b 100644
--- a/views/twig/admin/smtpCheck.html.twig
+++ b/views/twig/admin/smtpCheck.html.twig
@@ -43,14 +43,16 @@
                 <label class="col-4 form-label" for="oxshops__oxsmtp">{{ translate({ ident: "SHOP_MAIN_SMTPSERVER" }) }}</label>
                 <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtp.fldmax_length }}" id="oxshops__oxsmtp" name="smtpHost" value="{% if smtpHost %}{{ smtpHost }}{% else %}{{ shop.getFieldData('oxsmtp') }}{% endif %}">
             </div>
-            <div>
-                <label class="col-4 form-label" for="oxshops__oxsmtpuser">{{ translate({ ident: "SHOP_MAIN_SMTPUSER" }) }}</label>
-                <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtpuser.fldmax_length }}" id="oxshops__oxsmtpuser" name="smtpUser" value="{% if smtpUser %}{{ smtpUser }}{% else %}{{ shop.getFieldData('oxsmtpuser') }}{% endif %}">
-            </div>
-            <div>
-                <label class="col-4 form-label" for="oxshops__oxsmtppwd">{{ translate({ ident: "SHOP_MAIN_SMTPPASSWORD" }) }}</label>
-                <input type="password" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtppwd.fldmax_length }}" id="oxshops__oxsmtppwd" name="smtpPwd" value="{% if smtpPwd %}{{ smtpPwd }}{% else %}{{ shop.getFieldData('oxsmtppwd') }}{% endif %}">
-            </div>
+            {% block smtp_credentials %}
+                <div>
+                    <label class="col-4 form-label" for="oxshops__oxsmtpuser">{{ translate({ ident: "SHOP_MAIN_SMTPUSER" }) }}</label>
+                    <input type="text" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtpuser.fldmax_length }}" id="oxshops__oxsmtpuser" name="smtpUser" value="{% if smtpUser %}{{ smtpUser }}{% else %}{{ shop.getFieldData('oxsmtpuser') }}{% endif %}">
+                </div>
+                <div>
+                    <label class="col-4 form-label" for="oxshops__oxsmtppwd">{{ translate({ ident: "SHOP_MAIN_SMTPPASSWORD" }) }}</label>
+                    <input type="password" class="col-7 editinput" size="35" maxlength="{{ shop.oxshops__oxsmtppwd.fldmax_length }}" id="oxshops__oxsmtppwd" name="smtpPwd" value="{% if smtpPwd %}{{ smtpPwd }}{% else %}{{ shop.getFieldData('oxsmtppwd') }}{% endif %}">
+                </div>
+            {% endblock %}
             <div>
                 <label class="col-4 form-label" for="sender">{{ translate({ ident: "D3_MAILCHECKER_SMTPCHECK_SENDER" }) }}</label>
                 <select name="from" class="col-7 editinput" id="sender">