diff --git a/features/INDEX.md b/features/INDEX.md
index d4217c9..ad0b3bb 100644
--- a/features/INDEX.md
+++ b/features/INDEX.md
@@ -24,7 +24,7 @@
 | PROJ-10 | Admin-Bereich: Nutzer- & Postfachverwaltung | Deployed | [PROJ-10](PROJ-10-admin-bereich.md) | 2026-03-12 |
 | PROJ-11 | Audit-Log & Compliance-Berichte | Deployed | [PROJ-11](PROJ-11-audit-log.md) | 2026-03-12 |
 | PROJ-12 | E-Mail-Export (EML/PDF) | Deployed | [PROJ-12](PROJ-12-export.md) | 2026-03-12 |
-| PROJ-13 | REST API für externe CRM-Anbindung | In Progress | [PROJ-13](PROJ-13-rest-api-crm.md) | 2026-03-13 |
+| PROJ-13 | REST API für externe CRM-Anbindung | Deployed | [PROJ-13](PROJ-13-rest-api-crm.md) | 2026-03-13 |
 | PROJ-14 | E-Mail-Import: POP3-Verbindung | Deployed | [PROJ-14](PROJ-14-import-pop3.md) | 2026-03-13 |
 | PROJ-15 | CLI Import & Export (archivmail-User) | Deployed | [PROJ-15](PROJ-15-cli-import-export.md) | 2026-03-13 |
 | PROJ-16 | LDAP / Active Directory Anbindung | Deployed | [PROJ-16](PROJ-16-ldap-active-directory.md) | 2026-03-13 |
@@ -42,7 +42,7 @@
 | PROJ-26 | IMAP-Server-Schnittstelle (Read-Only Archivzugriff) | Deployed | [PROJ-26](PROJ-26-imap-server-schnittstelle.md) | 2026-03-18 |
 
 | PROJ-27 | Container-Ready (Dockerfile + Env-Vars) | In Review | [PROJ-27](PROJ-27-container-ready.md) | 2026-03-28 |
-| PROJ-28 | Self-Service Onboarding (Sign-up, E-Mail-Verifikation, Passwort-Reset) | In Progress | [PROJ-28](PROJ-28-self-service-onboarding.md) | 2026-03-28 |
+| PROJ-28 | Self-Service Onboarding (Sign-up, E-Mail-Verifikation, Passwort-Reset) | Deployed | [PROJ-28](PROJ-28-self-service-onboarding.md) | 2026-03-28 |
 | PROJ-29 | Tenant-Quotas & Usage-Limits | Deployed | [PROJ-29](PROJ-29-tenant-quotas.md) | 2026-03-28 |
 | PROJ-30 | Volltext-Index: Xapian → Manticore Search Migration | Deployed | [PROJ-30](PROJ-30-bleve-migration.md) | 2026-03-28 |
 | PROJ-31 | Billing & Subscriptions (Stripe) | Planned | [PROJ-31](PROJ-31-billing-subscriptions.md) | 2026-03-28 |
diff --git a/src/app/mail/[id]/page.tsx b/src/app/mail/[id]/page.tsx
index 09e980a..296cb7f 100644
--- a/src/app/mail/[id]/page.tsx
+++ b/src/app/mail/[id]/page.tsx
@@ -168,11 +168,12 @@ function MailBodyView({ mail }: { mail: MailDetail }) {
       <div className="space-y-2">
         {!showExternal && (
           <Alert>
-            <AlertDescription className="flex items-center justify-between gap-4 text-sm">
+            <AlertDescription className="flex flex-col items-start gap-2 text-sm sm:flex-row sm:items-center sm:justify-between sm:gap-4">
               <span>Externe Inhalte (Bilder, Tracker) sind blockiert.</span>
               <Button
                 variant="outline"
                 size="sm"
+                className="w-full sm:w-auto"
                 onClick={() => setShowExternal(true)}
               >
                 Externe Inhalte laden
@@ -346,8 +347,8 @@ export default function MailViewPage({
           </Button>
 
           {mail && (
-            <div className="flex items-center gap-2">
-              <Badge variant="outline" className="font-mono text-xs">
+            <div className="flex w-full flex-wrap items-center gap-2 sm:w-auto">
+              <Badge variant="outline" className="max-w-[40vw] truncate font-mono text-xs sm:max-w-none">
                 {id}
               </Badge>
               <Button
diff --git a/src/app/search/page.tsx b/src/app/search/page.tsx
index 80217e0..a52e0f1 100644
--- a/src/app/search/page.tsx
+++ b/src/app/search/page.tsx
@@ -383,18 +383,18 @@ export default function SearchPage() {
         {/* Main content */}
         <div className="flex-1 min-w-0">
         <form onSubmit={handleSubmit} className="space-y-4">
-          <div className="flex gap-2">
+          <div className="flex flex-wrap items-center gap-2">
             <Input
               placeholder="Volltextsuche..."
               value={query}
               onChange={(e) => setQuery(e.target.value)}
-              className="flex-1"
+              className="w-full flex-1 sm:w-auto"
               aria-label="Suchbegriff"
             />
-            <Button type="submit" disabled={searching}>
+            <Button type="submit" disabled={searching} className="flex-1 sm:flex-none">
               {searching ? "Suche..." : "Suchen"}
             </Button>
-            <Button type="button" variant="outline" onClick={() => setUploadOpen(true)}>
+            <Button type="button" variant="outline" onClick={() => setUploadOpen(true)} className="flex-1 sm:flex-none">
               Importieren
             </Button>
             {hasActiveSearch && (
@@ -596,7 +596,7 @@ export default function SearchPage() {
                 </Button>
               </div>
 
-              <Card>
+              <Card className="overflow-x-auto">
                 <Table>
                   <TableHeader>
                     <TableRow>
@@ -610,12 +610,12 @@ export default function SearchPage() {
                           aria-label="Alle auswählen"
                         />
                       </TableHead>
-                      <TableHead className="w-32">Datum</TableHead>
-                      <TableHead className="w-56">Von</TableHead>
+                      <TableHead className="w-28 sm:w-32">Datum</TableHead>
+                      <TableHead className="hidden w-56 md:table-cell">Von</TableHead>
                       <TableHead>Betreff</TableHead>
-                      <TableHead className="w-48">An</TableHead>
+                      <TableHead className="hidden w-48 lg:table-cell">An</TableHead>
                       <TableHead className="w-8 text-center" title="Anhang">📎</TableHead>
-                      <TableHead className="w-20 text-right">Größe</TableHead>
+                      <TableHead className="hidden w-20 text-right sm:table-cell">Größe</TableHead>
                     </TableRow>
                   </TableHeader>
                   <TableBody>
@@ -650,8 +650,8 @@ export default function SearchPage() {
                             ? new Date(hit.date).toLocaleString("de-DE", { dateStyle: "short", timeStyle: "short" })
                             : "-"}
                         </TableCell>
-                        <TableCell className="max-w-[14rem] truncate text-sm">{hit.from || "-"}</TableCell>
-                        <TableCell className="font-medium">
+                        <TableCell className="hidden max-w-[14rem] truncate text-sm md:table-cell">{hit.from || "-"}</TableCell>
+                        <TableCell className="max-w-[60vw] font-medium sm:max-w-none">
                           <div className="flex items-center gap-2">
                             <span className="truncate">{hit.subject || "(kein Betreff)"}</span>
                             {hit.thread_size && hit.thread_size > 1 && (
@@ -660,13 +660,19 @@ export default function SearchPage() {
                               </span>
                             )}
                           </div>
+                          {/* Absender nur auf Mobile, da Spalte "Von" dort ausgeblendet ist */}
+                          {hit.from && (
+                            <div className="mt-0.5 truncate text-xs text-muted-foreground md:hidden">
+                              {hit.from}
+                            </div>
+                          )}
                           <SnippetLine hit={hit} />
                         </TableCell>
-                        <TableCell className="max-w-[12rem] truncate text-sm text-muted-foreground">{hit.to || "-"}</TableCell>
+                        <TableCell className="hidden max-w-[12rem] truncate text-sm text-muted-foreground lg:table-cell">{hit.to || "-"}</TableCell>
                         <TableCell className="text-center text-sm">
                           {hit.has_attachments ? "📎" : ""}
                         </TableCell>
-                        <TableCell className="text-right text-xs text-muted-foreground whitespace-nowrap">
+                        <TableCell className="hidden text-right text-xs text-muted-foreground whitespace-nowrap sm:table-cell">
                           {hit.size ? formatBytes(hit.size) : ""}
                         </TableCell>
                       </TableRow>