diff --git a/app/(main)/[locale]/contacts/page.tsx b/app/(main)/[locale]/contacts/page.tsx
index c8fb7a46..aac399b4 100644
--- a/app/(main)/[locale]/contacts/page.tsx
+++ b/app/(main)/[locale]/contacts/page.tsx
@@ -2,6 +2,8 @@
 
 import { useState, useEffect, useCallback, useRef, useMemo } from "react";
 import { useTranslations } from "next-intl";
+import { useSearchParams } from "next/navigation";
+import { useRouter } from "@/i18n/navigation";
 import { ArrowLeft, Users, AlertTriangle } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
@@ -93,6 +95,8 @@ export default function ContactsPage() {
   const [renamingAddressBook, setRenamingAddressBook] = useState<AddressBook | null>(null);
   const [sharingAddressBookId, setSharingAddressBookId] = useState<string | null>(null);
   const [defaultBookIdForCreate, setDefaultBookIdForCreate] = useState<string | undefined>(undefined);
+  const [createPrefill, setCreatePrefill] = useState<{ email?: string; name?: string } | undefined>(undefined);
+  const [returnToEmail, setReturnToEmail] = useState(false);
   const [renamingKeyword, setRenamingKeyword] = useState<string | null>(null);
   const [selectedGroupId, setSelectedGroupId] = useState<string | null>(null);
   const hasFetched = useRef(false);
@@ -100,6 +104,12 @@ export default function ContactsPage() {
   const isMobile = useIsMobile();
   const isDesktop = useIsDesktop();
   const isEmbedded = useIsEmbedded();
+  const router = useRouter();
+  const searchParams = useSearchParams();
+  // One-shot intent flag: only consume the URL params on the first render that
+  // has them. After applying, we strip the query so a later refresh or
+  // re-mount doesn't re-trigger the navigation.
+  const intentAppliedRef = useRef(false);
   // Narrow pane (Pro split or small window): the categories sidebar collapses
   // into a burger-toggled overlay.
   const isNarrow = !isDesktop;
@@ -154,6 +164,29 @@ export default function ContactsPage() {
     }
   }, [client, supportsSync, fetchContacts, isEmbedded]);
 
+  // Consume one-shot URL params (set by the mobile recipient popover when no
+  // sidebar is available) and strip them so a refresh doesn't replay the
+  // intent. `from=email` flips the mobile back button to `router.back()`.
+  useEffect(() => {
+    if (intentAppliedRef.current) return;
+    const contactId = searchParams.get('contactId');
+    const addEmail = searchParams.get('addEmail');
+    const addName = searchParams.get('addName');
+    const from = searchParams.get('from');
+    if (!contactId && !addEmail && !from) return;
+    intentAppliedRef.current = true;
+    if (from === 'email') setReturnToEmail(true);
+    if (contactId) {
+      setSelectedContact(contactId);
+      setView('detail');
+    } else if (addEmail) {
+      setCreatePrefill({ email: addEmail, name: addName ?? undefined });
+      setSelectedContact(null);
+      setView('create');
+    }
+    router.replace('/contacts');
+  }, [searchParams, router, setSelectedContact]);
+
   // Intercept browser refresh gestures (F5, Ctrl/Cmd+R, pull-to-refresh)
   // and refresh contacts via JMAP instead of reloading the page.
   useRefreshGesture({
@@ -365,8 +398,14 @@ export default function ContactsPage() {
       toast.success(t("toast.created"));
     }
     setDefaultBookIdForCreate(undefined);
+    setCreatePrefill(undefined);
+    if (returnToEmail) {
+      setReturnToEmail(false);
+      router.back();
+      return;
+    }
     setView("list");
-  }, [supportsSync, client, createContact, addLocalContact, t]);
+  }, [supportsSync, client, createContact, addLocalContact, t, returnToEmail, router]);
 
   const handleSaveEdit = useCallback(async (data: Partial<ContactCard>) => {
     if (!selectedContact) return;
@@ -383,6 +422,14 @@ export default function ContactsPage() {
 
   const handleCancel = () => {
     setDefaultBookIdForCreate(undefined);
+    // Came from email → cancel returns to the email instead of the contact list.
+    if (returnToEmail && view === "create") {
+      setCreatePrefill(undefined);
+      setReturnToEmail(false);
+      router.back();
+      return;
+    }
+    if (view === "create") setCreatePrefill(undefined);
     if (view === "group-create" || view === "group-edit") {
       setView(selectedGroup ? "group-detail" : "list");
     } else if (view === "bulk-add-to-group") {
@@ -554,7 +601,7 @@ export default function ContactsPage() {
   const renderRightPanel = () => {
     switch (view) {
       case "create":
-        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} defaultAddressBookId={defaultBookIdForCreate} onSave={handleSaveNew} onCancel={handleCancel} />;
+        return <ContactForm addressBooks={addressBooks} allKeywords={allKeywords} defaultAddressBookId={defaultBookIdForCreate} prefill={createPrefill} onSave={handleSaveNew} onCancel={handleCancel} />;
 
       case "edit":
         if (!selectedContact) return null;
@@ -686,6 +733,12 @@ export default function ContactsPage() {
   const showRightPanel = !isMobile || view !== "list";
 
   const mobileBackToList = () => {
+    if (returnToEmail) {
+      setReturnToEmail(false);
+      setCreatePrefill(undefined);
+      router.back();
+      return;
+    }
     setView("list");
     clearSelection();
   };
@@ -853,7 +906,7 @@ export default function ContactsPage() {
                     className="touch-manipulation"
                   >
                     <ArrowLeft className="w-4 h-4 mr-2" />
-                    {t("back_to_contacts")}
+                    {returnToEmail ? t("back_to_email") : t("back_to_contacts")}
                   </Button>
                 </div>
               )}
diff --git a/components/contacts/contact-form.tsx b/components/contacts/contact-form.tsx
index c99491fa..462fdd9d 100644
--- a/components/contacts/contact-form.tsx
+++ b/components/contacts/contact-form.tsx
@@ -52,6 +52,8 @@ interface ContactFormProps {
   addressBooks?: AddressBook[];
   allKeywords?: string[];
   defaultAddressBookId?: string;
+  /** Prefills the create form (ignored when `contact` is set). */
+  prefill?: { email?: string; name?: string };
   onSave: (data: Partial<ContactCard>) => Promise<void>;
   onCancel: () => void;
 }
@@ -145,10 +147,22 @@ function Select({ value, onChange, children, className }: {
   );
 }
 
-export function ContactForm({ contact, addressBooks, allKeywords, defaultAddressBookId, onSave, onCancel }: ContactFormProps) {
+export function ContactForm({ contact, addressBooks, allKeywords, defaultAddressBookId, prefill, onSave, onCancel }: ContactFormProps) {
   const t = useTranslations("contacts.form");
   const isEditing = !!contact;
 
+  // Split a free-form display name into given/surname for prefill.
+  const prefillGivenName = (() => {
+    if (contact || !prefill?.name) return "";
+    const parts = prefill.name.trim().split(/\s+/);
+    return parts[0] || "";
+  })();
+  const prefillSurname = (() => {
+    if (contact || !prefill?.name) return "";
+    const parts = prefill.name.trim().split(/\s+/);
+    return parts.slice(1).join(" ");
+  })();
+
   // Accept JSContact-standard kinds (RFC 9553) and legacy vCard-style aliases.
   const findComponent = (...kinds: string[]) =>
     contact?.name?.components?.find(c => kinds.includes(c.kind))?.value || "";
@@ -215,9 +229,9 @@ export function ContactForm({ contact, addressBooks, allKeywords, defaultAddress
   }
 
   const [prefix, setPrefix] = useState(findComponent("title", "prefix"));
-  const [givenName, setGivenName] = useState(findComponent("given"));
+  const [givenName, setGivenName] = useState(findComponent("given") || prefillGivenName);
   const [additionalName, setAdditionalName] = useState(findComponent("given2", "additional", "middle"));
-  const [surname, setSurname] = useState(findComponent("surname"));
+  const [surname, setSurname] = useState(findComponent("surname") || prefillSurname);
   const [suffix, setSuffix] = useState(findComponent("generation", "suffix"));
 
   const [nickname, setNickname] = useState(
@@ -231,7 +245,7 @@ export function ContactForm({ contact, addressBooks, allKeywords, defaultAddress
         context: e.contexts?.work ? "work" : e.contexts?.private ? "private" : "",
       }));
     }
-    return [{ address: "", context: "" }];
+    return [{ address: prefill?.email || "", context: "" }];
   });
 
   const [phones, setPhones] = useState<PhoneEntry[]>(() => {
diff --git a/components/email/email-viewer.tsx b/components/email/email-viewer.tsx
index ce196519..411468a6 100644
--- a/components/email/email-viewer.tsx
+++ b/components/email/email-viewer.tsx
@@ -65,6 +65,7 @@ import {
   PenSquare,
 } from "lucide-react";
 import { useTranslations } from "next-intl";
+import { useRouter } from "@/i18n/navigation";
 import type { Attachment as PostalMimeAttachment } from 'postal-mime';
 import { useSettingsStore, KEYWORD_PALETTE } from "@/stores/settings-store";
 import { useUIStore } from "@/stores/ui-store";
@@ -1137,9 +1138,34 @@ export function EmailViewer({
   const [contactSidebarEmail, setContactSidebarEmail] = useState<string | null>(null);
   const contacts = useContactStore((s) => s.contacts);
   const { isMobile: isMobileDevice } = useDeviceDetection();
+  const router = useRouter();
 
   const handleViewContactSidebar = (contact: ContactCard | null, recipientEmail: string) => {
-    if (isMobileDevice) return; // no sidebar on mobile
+    if (isMobileDevice) {
+      // No room for a sidebar on mobile — send the user to the contacts page
+      // with params describing what to show. The `from=email` flag turns the
+      // page's mobile back button into a router.back() that returns here.
+      const allRecipients = [
+        ...(email?.from || []),
+        ...(email?.to || []),
+        ...(email?.cc || []),
+        ...(email?.bcc || []),
+        ...(email?.replyTo || []),
+      ];
+      const recipientName = allRecipients.find(
+        (r) => r.email.toLowerCase() === recipientEmail.toLowerCase()
+      )?.name;
+      const params = new URLSearchParams();
+      if (contact) {
+        params.set('contactId', contact.id);
+      } else {
+        params.set('addEmail', recipientEmail);
+        if (recipientName) params.set('addName', recipientName);
+      }
+      params.set('from', 'email');
+      router.push(`/contacts?${params.toString()}`);
+      return;
+    }
     setContactSidebarEmail(recipientEmail);
   };
 
diff --git a/locales/cs/common.json b/locales/cs/common.json
index ee0d0883..af67b846 100644
--- a/locales/cs/common.json
+++ b/locales/cs/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Opravdu chcete odstranit tento kontakt?",
     "local_mode": "Kontakty jsou uloženy lokálně (server nepodporuje JMAP Contacts)",
     "back_to_contacts": "Zpět na kontakty",
+    "back_to_email": "Zpět na e-mail",
     "tabs": {
       "all": "Všechny",
       "groups": "Skupiny"
diff --git a/locales/da/common.json b/locales/da/common.json
index ab941962..66c1e56c 100644
--- a/locales/da/common.json
+++ b/locales/da/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Er du sikker på, at du vil slette denne kontakt?",
     "local_mode": "Kontakter gemmes lokalt (serveren understøtter ikke JMAP-kontakter)",
     "back_to_contacts": "Tilbage til kontakter",
+    "back_to_email": "Tilbage til e-mail",
     "tabs": {
       "all": "Alle",
       "groups": "Grupper"
diff --git a/locales/de/common.json b/locales/de/common.json
index 4b0c168d..40a4f82e 100644
--- a/locales/de/common.json
+++ b/locales/de/common.json
@@ -1962,6 +1962,7 @@
     "delete_confirm": "Möchten Sie diesen Kontakt wirklich löschen?",
     "local_mode": "Kontakte werden lokal gespeichert (Server unterstützt kein JMAP Contacts)",
     "back_to_contacts": "Zurück zu Kontakten",
+    "back_to_email": "Zurück zur E-Mail",
     "tabs": {
       "all": "Alle",
       "groups": "Gruppen"
diff --git a/locales/en/common.json b/locales/en/common.json
index cd572e62..e1979b6d 100644
--- a/locales/en/common.json
+++ b/locales/en/common.json
@@ -1962,6 +1962,7 @@
     "delete_confirm": "Are you sure you want to delete this contact?",
     "local_mode": "Contacts are stored locally (server does not support JMAP Contacts)",
     "back_to_contacts": "Back to contacts",
+    "back_to_email": "Back to email",
     "open_categories": "Open categories",
     "tabs": {
       "all": "All",
diff --git a/locales/es/common.json b/locales/es/common.json
index 0f530962..10d2aa31 100644
--- a/locales/es/common.json
+++ b/locales/es/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "¿Estás seguro de que quieres eliminar este contacto?",
     "local_mode": "Los contactos se almacenan localmente (el servidor no soporta JMAP Contacts)",
     "back_to_contacts": "Volver a contactos",
+    "back_to_email": "Volver al correo",
     "tabs": {
       "all": "Todos",
       "groups": "Grupos"
diff --git a/locales/fr/common.json b/locales/fr/common.json
index c7b50e76..1da607b9 100644
--- a/locales/fr/common.json
+++ b/locales/fr/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Êtes-vous sûr de vouloir supprimer ce contact ?",
     "local_mode": "Les contacts sont stockés localement (le serveur ne prend pas en charge JMAP Contacts)",
     "back_to_contacts": "Retour aux contacts",
+    "back_to_email": "Retour à l'e-mail",
     "tabs": {
       "all": "Tous",
       "groups": "Groupes"
diff --git a/locales/it/common.json b/locales/it/common.json
index 19610f4b..847379cf 100644
--- a/locales/it/common.json
+++ b/locales/it/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Sei sicuro di voler eliminare questo contatto?",
     "local_mode": "I contatti sono salvati localmente (il server non supporta JMAP Contacts)",
     "back_to_contacts": "Torna ai contatti",
+    "back_to_email": "Torna all'e-mail",
     "tabs": {
       "all": "Tutti",
       "groups": "Gruppi"
diff --git a/locales/ja/common.json b/locales/ja/common.json
index fa7d13b5..22427a57 100644
--- a/locales/ja/common.json
+++ b/locales/ja/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "この連絡先を削除してもよろしいですか？",
     "local_mode": "連絡先はローカルに保存されています（サーバーがJMAPコンタクトをサポートしていません）",
     "back_to_contacts": "連絡先に戻る",
+    "back_to_email": "メールに戻る",
     "tabs": {
       "all": "すべて",
       "groups": "グループ"
diff --git a/locales/ko/common.json b/locales/ko/common.json
index 2a88993c..041c0760 100644
--- a/locales/ko/common.json
+++ b/locales/ko/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "정말 이 연락처를 삭제할까요?",
     "local_mode": "연락처가 로컬에 저장돼요 (서버가 JMAP Contacts를 지원하지 않아요)",
     "back_to_contacts": "연락처로 돌아가기",
+    "back_to_email": "이메일로 돌아가기",
     "tabs": {
       "all": "전체",
       "groups": "그룹"
diff --git a/locales/lv/common.json b/locales/lv/common.json
index adc2a089..d6cf53a4 100644
--- a/locales/lv/common.json
+++ b/locales/lv/common.json
@@ -1946,6 +1946,7 @@
     "delete_confirm": "Vai tiešām vēlaties dzēst šo kontaktu?",
     "local_mode": "Kontakti tiek glabāti lokāli (serveris neatbalsta JMAP Contacts)",
     "back_to_contacts": "Atpakaļ pie kontaktiem",
+    "back_to_email": "Atpakaļ pie e-pasta",
     "tabs": {
       "all": "Visi",
       "groups": "Grupas"
diff --git a/locales/nl/common.json b/locales/nl/common.json
index 8652cab5..72adf8e4 100644
--- a/locales/nl/common.json
+++ b/locales/nl/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Weet u zeker dat u dit contact wilt verwijderen?",
     "local_mode": "Contacten worden lokaal opgeslagen (server ondersteunt geen JMAP Contacts)",
     "back_to_contacts": "Terug naar contacten",
+    "back_to_email": "Terug naar e-mail",
     "tabs": {
       "all": "Alle",
       "groups": "Groepen"
diff --git a/locales/pl/common.json b/locales/pl/common.json
index 1fa5dd5c..25f56e20 100644
--- a/locales/pl/common.json
+++ b/locales/pl/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Czy na pewno chcesz usunąć ten kontakt?",
     "local_mode": "Kontakty są przechowywane lokalnie (serwer nie obsługuje JMAP Contacts)",
     "back_to_contacts": "Powrót do kontaktów",
+    "back_to_email": "Powrót do wiadomości",
     "tabs": {
       "all": "Wszystkie",
       "groups": "Grupy"
diff --git a/locales/pt/common.json b/locales/pt/common.json
index 0982fefd..c0566111 100644
--- a/locales/pt/common.json
+++ b/locales/pt/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Tem certeza de que deseja excluir este contato?",
     "local_mode": "Os contatos são armazenados localmente (o servidor não suporta JMAP Contacts)",
     "back_to_contacts": "Voltar aos contatos",
+    "back_to_email": "Voltar ao e-mail",
     "tabs": {
       "all": "Todos",
       "groups": "Grupos"
diff --git a/locales/ru/common.json b/locales/ru/common.json
index 4d199691..54687350 100644
--- a/locales/ru/common.json
+++ b/locales/ru/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Вы уверены, что хотите удалить этот контакт?",
     "local_mode": "Контакты хранятся локально (сервер не поддерживает JMAP Contacts)",
     "back_to_contacts": "Вернуться к контактам",
+    "back_to_email": "Вернуться к письму",
     "tabs": {
       "all": "Все",
       "groups": "Группы"
diff --git a/locales/tr/common.json b/locales/tr/common.json
index d05fd476..3c343cfa 100644
--- a/locales/tr/common.json
+++ b/locales/tr/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Bu kişiyi silmek istediğinizden emin misiniz?",
     "local_mode": "Kişiler yerel olarak saklanıyor (sunucu JMAP Kişilerini desteklemiyor)",
     "back_to_contacts": "Kişilere geri dön",
+    "back_to_email": "E-postaya geri dön",
     "tabs": {
       "all": "Tümü",
       "groups": "Gruplar"
diff --git a/locales/uk/common.json b/locales/uk/common.json
index d7601acd..7e182fe9 100644
--- a/locales/uk/common.json
+++ b/locales/uk/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "Ви впевнені, що хочете видалити цей контакт?",
     "local_mode": "Контакти зберігаються локально (сервер не підтримує контакти JMAP)",
     "back_to_contacts": "Назад до контактів",
+    "back_to_email": "Назад до листа",
     "tabs": {
       "all": "все",
       "groups": "Групи"
diff --git a/locales/zh/common.json b/locales/zh/common.json
index 0240363f..f18f7767 100644
--- a/locales/zh/common.json
+++ b/locales/zh/common.json
@@ -1950,6 +1950,7 @@
     "delete_confirm": "您确定要删除此联系人吗？",
     "local_mode": "联系人存储在本地（服务器不支持 JMAP 联系人）",
     "back_to_contacts": "返回联系人",
+    "back_to_email": "返回邮件",
     "tabs": {
       "all": "全部",
       "groups": "群组"