diff --git a/feca_mailshots_plugin/feca_mailshots_plugin.php b/feca_mailshots_plugin/feca_mailshots_plugin.php
index 115e1f3..5630078 100644
--- a/feca_mailshots_plugin/feca_mailshots_plugin.php
+++ b/feca_mailshots_plugin/feca_mailshots_plugin.php
@@ -3,7 +3,7 @@
  * Plugin Name: FECA Mailshots
  * Plugin URI: https://fenedge.co.uk/
  * Description: FECA mailshots plugin.
- * Version: 1.1.8
+ * Version: 1.1.10
  * Requires at least: 6.0
  * Requires PHP: 7.4
  * Author: FECA
diff --git a/feca_mailshots_plugin/src/Admin/AdminRequestHelpers.php b/feca_mailshots_plugin/src/Admin/AdminRequestHelpers.php
index 944b7e9..12a827b 100644
--- a/feca_mailshots_plugin/src/Admin/AdminRequestHelpers.php
+++ b/feca_mailshots_plugin/src/Admin/AdminRequestHelpers.php
@@ -55,6 +55,9 @@ trait AdminRequestHelpers
             . '.feca-mailshots-admin .feca-form .form-table th,.feca-mailshots-admin .feca-form .form-table td{padding-top:12px;padding-bottom:12px;}'
             . '.feca-mailshots-admin .feca-form .form-table th{width:220px;}'
             . '.feca-mailshots-admin .feca-form .description{margin-top:var(--feca-space-1);}'
+            . '.feca-mailshots-admin .feca-password-control{display:flex;align-items:center;gap:8px;max-width:34rem;}'
+            . '.feca-mailshots-admin .feca-password-control .regular-text{flex:1;min-width:220px;margin:0;}'
+            . '.feca-mailshots-admin .feca-password-toggle{min-width:74px;text-align:center;}'
             . '.feca-mailshots-admin .feca-inline-form{display:inline;}'
             . '.feca-mailshots-admin .feca-hidden{display:none;}'
             . '.feca-mailshots-admin .feca-meta-line{margin:4px 0 var(--feca-space-3) 0;color:#6b7280;font-size:12px;}'
diff --git a/feca_mailshots_plugin/src/Admin/ProfileAdminPage.php b/feca_mailshots_plugin/src/Admin/ProfileAdminPage.php
index ea543ba..a0ef4c3 100644
--- a/feca_mailshots_plugin/src/Admin/ProfileAdminPage.php
+++ b/feca_mailshots_plugin/src/Admin/ProfileAdminPage.php
@@ -46,16 +46,39 @@ final class ProfileAdminPage
         }
 
         $uid = $this->wp->currentUserId();
-        $saved = $uid > 0 ? ($this->repo()->findByUserId($uid) ?? []) : [];
+        $saved = [];
+        $loadError = '';
+        if ($uid > 0) {
+            try {
+                $saved = $this->repo()->findByUserId($uid) ?? [];
+            } catch (\Throwable $e) {
+                $loadError = 'Unable to load stored profile credentials: ' . $e->getMessage();
+            }
+        }
         $status = $this->wp->requestParam('saved', '') === '1' ? 'Profile credentials saved.' : '';
         $test = $uid > 0 ? $this->testResult($uid) : null;
         $action = htmlspecialchars($this->wp->adminUrl('admin-post.php'));
+        $missingPasswords = $loadError === '' ? $this->missingPasswordLabels($saved) : [];
 
         echo '<div class="wrap feca-mailshots-admin"><h1>Mailshot Profile</h1>';
         echo $this->renderAdminUiStyles();
+        if ($loadError !== '') {
+            echo '<div class="feca-banner feca-banner-error">' . htmlspecialchars($loadError) . '</div>';
+        }
         if ($status !== '') {
             echo '<div class="feca-banner feca-banner-success">' . htmlspecialchars($status) . '</div>';
         }
+        if ($missingPasswords !== []) {
+            echo '<div class="feca-banner feca-banner-error">';
+            echo '<strong>' . htmlspecialchars('Missing password configuration.') . '</strong>';
+            echo '<p>' . htmlspecialchars('Enter and save the missing password before running mailshot tests or sends.') . '</p>';
+            echo '<ul>';
+            foreach ($missingPasswords as $label) {
+                echo '<li>' . htmlspecialchars($label) . '</li>';
+            }
+            echo '</ul>';
+            echo '</div>';
+        }
         if ($test !== null) {
             $ok = !empty($test['ok']);
             $kind = strtoupper((string) ($test['kind'] ?? 'CREDENTIAL'));
@@ -92,7 +115,7 @@ final class ProfileAdminPage
         $this->field('SMTP Host', 'smtp_host', $saved['smtp_host'] ?? '');
         $this->field('SMTP Port', 'smtp_port', (string) ($saved['smtp_port'] ?? ''));
         $this->field('SMTP User', 'smtp_user', $saved['smtp_user'] ?? '');
-        $this->field('SMTP Password', 'smtp_password', '', 'password', 'Required on each save/test request');
+        $this->field('SMTP Password', 'smtp_password', (string) ($saved['smtp_password'] ?? ''), 'password');
         $this->field('From Email', 'smtp_from_email', $saved['smtp_from_email'] ?? '');
         $this->field('From Name', 'smtp_from_name', $saved['smtp_from_name'] ?? '');
 
@@ -105,7 +128,7 @@ final class ProfileAdminPage
         $this->field('IMAP Host', 'imap_host', $saved['imap_host'] ?? '');
         $this->field('IMAP Port', 'imap_port', (string) ($saved['imap_port'] ?? ''));
         $this->field('IMAP User', 'imap_user', $saved['imap_user'] ?? '');
-        $this->field('IMAP Password', 'imap_password', '', 'password', 'Required on each save/test request');
+        $this->field('IMAP Password', 'imap_password', (string) ($saved['imap_password'] ?? ''), 'password');
         $this->field('IMAP Sent Folder', 'imap_sent_folder', $saved['imap_sent_folder'] ?? '');
         $this->field('IMAP Mailbox Flags', 'imap_mailbox_flags', $saved['imap_mailbox_flags'] ?? '');
         echo '</table>';
@@ -116,7 +139,9 @@ final class ProfileAdminPage
         echo '<button type="submit" class="button" name="action" value="feca_mailshots_profile_test" formaction="' . $action . '" formmethod="post" title="Test IMAP login" onclick="this.form.test_kind.value=\'imap\';">Test IMAP</button>';
         echo '<input type="hidden" name="test_kind" value="">';
         echo '</p>';
-        echo '</form></div>';
+        echo '</form>';
+        echo $this->renderPasswordToggleScript();
+        echo '</div>';
     }
 
     public function handleSave(): void
@@ -210,6 +235,8 @@ final class ProfileAdminPage
             'imap_mailbox_flags' => trim((string) ($this->wp->requestParam('imap_mailbox_flags', '') ?? '')),
         ];
 
+        $payload = $this->applyStoredPasswordsForTest($uid, $payload);
+
         $result = $kind === 'smtp' ? $this->runSmtpTest($payload) : $this->runImapTest($payload);
         $this->wp->updateOption($this->testResultOptionKey($uid), $result);
 
@@ -225,13 +252,76 @@ final class ProfileAdminPage
     {
         echo '<tr>';
         echo '<th scope="row"><label for="' . htmlspecialchars($name) . '">' . htmlspecialchars($label) . '</label></th>';
-        echo '<td><input class="regular-text" type="' . htmlspecialchars($type) . '" id="' . htmlspecialchars($name) . '" name="' . htmlspecialchars($name) . '" value="' . htmlspecialchars($value, ENT_QUOTES) . '">';
+        echo '<td>';
+        if ($type === 'password') {
+            echo '<span class="feca-password-control">';
+            echo '<input class="regular-text" type="password" autocomplete="off" id="' . htmlspecialchars($name) . '" name="' . htmlspecialchars($name) . '" value="' . htmlspecialchars($value, ENT_QUOTES) . '">';
+            echo '<button type="button" class="button feca-password-toggle" data-feca-password-toggle="' . htmlspecialchars($name) . '" aria-controls="' . htmlspecialchars($name) . '" aria-pressed="false">' . htmlspecialchars('Show') . '</button>';
+            echo '</span>';
+        } else {
+            echo '<input class="regular-text" type="' . htmlspecialchars($type) . '" id="' . htmlspecialchars($name) . '" name="' . htmlspecialchars($name) . '" value="' . htmlspecialchars($value, ENT_QUOTES) . '">';
+        }
         if ($hint !== '') {
             echo '<p class="description">' . htmlspecialchars($hint) . '</p>';
         }
         echo '</td></tr>';
     }
 
+    private function renderPasswordToggleScript(): string
+    {
+        return <<<'HTML'
+<script>
+(function () {
+    var buttons = document.querySelectorAll('[data-feca-password-toggle]');
+    Array.prototype.forEach.call(buttons, function (button) {
+        button.addEventListener('click', function () {
+            var fieldId = button.getAttribute('data-feca-password-toggle');
+            var field = fieldId ? document.getElementById(fieldId) : null;
+            if (!field) {
+                return;
+            }
+            var visible = field.type === 'text';
+            field.type = visible ? 'password' : 'text';
+            button.setAttribute('aria-pressed', visible ? 'false' : 'true');
+            button.textContent = visible ? 'Show' : 'Hide';
+        });
+    });
+}());
+</script>
+HTML;
+    }
+
+    /** @param array<string, mixed> $saved @return list<string> */
+    private function missingPasswordLabels(array $saved): array
+    {
+        $missing = [];
+        if (trim((string) ($saved['smtp_password'] ?? '')) === '') {
+            $missing[] = 'SMTP password is missing.';
+        }
+        if (trim((string) ($saved['imap_password'] ?? '')) === '') {
+            $missing[] = 'IMAP password is missing.';
+        }
+        return $missing;
+    }
+
+    /** @param array<string, mixed> $payload @return array<string, mixed> */
+    private function applyStoredPasswordsForTest(int $uid, array $payload): array
+    {
+        try {
+            $saved = $this->repo()->findByUserId($uid) ?? [];
+        } catch (\Throwable $e) {
+            return $payload;
+        }
+
+        foreach (['smtp_password', 'imap_password'] as $key) {
+            if (trim((string) ($payload[$key] ?? '')) === '' && trim((string) ($saved[$key] ?? '')) !== '') {
+                $payload[$key] = (string) $saved[$key];
+            }
+        }
+
+        return $payload;
+    }
+
     private function repo(): MailCredentialRepository
     {
         return ($this->repoFactory)();