diff --git a/addon/_locales/de/messages.json b/addon/_locales/de/messages.json
index 504aa2d..32cb173 100644
--- a/addon/_locales/de/messages.json
+++ b/addon/_locales/de/messages.json
@@ -288,7 +288,7 @@
         "message": "Schlüssel-Import nicht möglich solange das Gerät Mitglied einer Gerätegruppe ist."
     },
     "optionsImportSuccessPublicKey": {
-        "message": "Öffentlicher Schlüssel erfolgreich importiert. Bitten geben Sie die E-Mail-Adresse des Kommunikationspartners an:"
+        "message": "Öffentlicher Schlüssel erfolgreich importiert. Der Fingerabdruck des ausgewählten Schlüssel ist:{0}Bitten geben Sie die E-Mail-Adresse des Kommunikationspartners an:"
     },
     "optionsImportFingerprint": {
         "message": "Privater Schlüssel erfolgreich importiert. Der Fingerabdruck des ausgewählten Schlüssel ist:"
diff --git a/addon/_locales/en/messages.json b/addon/_locales/en/messages.json
index 81d8042..a7bbc98 100644
--- a/addon/_locales/en/messages.json
+++ b/addon/_locales/en/messages.json
@@ -288,7 +288,7 @@
         "message": "Key import not possible while the device is in a device group."
     },
     "optionsImportSuccessPublicKey": {
-        "message": "Public key successfully imported. Please specify communication partner's email address:"
+        "message": "Public key successfully imported. The fingerprint of the selected key is:{0}Please specify communication partner's email address:"
     },
     "optionsImportFingerprint": {
         "message": "Private key successfully imported. The fingerprint of the selected key is:"
diff --git a/addon/content/dialogs/options.js b/addon/content/dialogs/options.js
index ffc0010..a5328b0 100644
--- a/addon/content/dialogs/options.js
+++ b/addon/content/dialogs/options.js
@@ -372,6 +372,8 @@ var pEpOptions = {
   },
 
   async importKey() {
+    this.cancelKey();
+
     // Workaround for ENGINE-808.
     if (Services.prefs.getBoolPref("extensions.pEp.grouped", false)) {
       Services.prompt.alert(
@@ -411,8 +413,9 @@ var pEpOptions = {
 
     // Send to the engine.
     let result;
+    let fprs;
     try {
-      result = await pEpController.import_key(btoa(streamData));
+      [result, fprs] = await pEpController.import_key_with_fpr_return(btoa(streamData));
     } catch (err) {
       pEpController.log.error(`Key import error: ${err.message}`);
       Services.prompt.alert(
@@ -433,11 +436,15 @@ var pEpOptions = {
       pEpController.log.info("Public key import");
       msg = pEpOptions.getLocaleMessage("optionsImportSuccessPublicKey");
 
+      const fpr = fprs[0].replace(/(....)/g, "$1 ").trim();
+      msg = msg.replace("{0}", `\n${fpr}\n`);
+
       let importResult = document.getElementById("importResult");
       importResult.textContent = msg;
       importResult.removeAttribute("hidden");
 
-      // E-Mail entry missing here.
+      let commPartnerAddress = document.getElementById("commPartnerAddress");
+      commPartnerAddress.removeAttribute("hidden");
 
       let button1 = document.getElementById("useForAddress");
       button1.removeAttribute("hidden");
@@ -468,11 +475,31 @@ var pEpOptions = {
     gImportResult = result;
   },
 
+  commPartnerKeyPress(event, element) {
+    if (event.key != "Enter" && event.key != "Tab") {
+      return;
+    }
+    let email = element.value;
+    if (!email.includes("@", 1) || email.endsWith("@")) {
+      // Invalid.
+      event.preventDefault();
+      return;
+    }
+
+    // Make Enter move to the next UI element as Tab already does.
+    if (event.key == "Enter") {
+      let button = document.getElementById("useForAddress");
+      button.focus();
+    }
+  },
+
   cancelKey() {
     let importResult = document.getElementById("importResult");
     importResult.textContent = "";
     importResult.setAttribute("hidden", "hidden");
 
+    let commPartnerAddress = document.getElementById("commPartnerAddress");
+    commPartnerAddress.setAttribute("hidden", "hidden");
     let importOptions = document.getElementById("importOptions");
     importOptions.setAttribute("hidden", "true");
     let button1 = document.getElementById("useKey");
diff --git a/addon/content/dialogs/options.xhtml b/addon/content/dialogs/options.xhtml
index a039f76..4cdade1 100644
--- a/addon/content/dialogs/options.xhtml
+++ b/addon/content/dialogs/options.xhtml
@@ -155,7 +155,17 @@
             <radio value="group" label-localekey="optionsPrivateGroup"/>
             <radio value="other" label-localekey="optionsOther"/>
           </radiogroup>
-          <!-- E-mail entry box for pub key missing here -->
+          <html:input is="autocomplete-input" id="commPartnerAddress"
+                      hidden="hidden"
+                      autocompletesearch="addrbook"
+                      autocompletesearchparam="{}"
+                      timeout="300"
+                      maxrows="4"
+                      completedefaultindex="true"
+                      forcecomplete="true"
+                      completeselectedindex="true"
+                      minresultsforpopup="3"
+                      onkeypress="pEpOptions.commPartnerKeyPress(event, this);"/>
           <hbox class="button-group">
             <html:button id="useKey"
                          hidden="true"
diff --git a/addon/content/modules/pEp.js b/addon/content/modules/pEp.js
index 46a2a4b..2c3a882 100644
--- a/addon/content/modules/pEp.js
+++ b/addon/content/modules/pEp.js
@@ -227,8 +227,8 @@ class pEp {
     return this.adapter.config_unencrypted_subject(true);
   }
 
-  async import_key(keydata) {
-    return this.adapter.import_key(keydata);
+  async import_key_with_fpr_return(keydata) {
+    return this.adapter.import_key_with_fpr_return(keydata);
   }
 
   async set_own_key(identity) {
diff --git a/addon/content/modules/pEpAdapter.js b/addon/content/modules/pEpAdapter.js
index bd1a572..fbfc851 100644
--- a/addon/content/modules/pEpAdapter.js
+++ b/addon/content/modules/pEpAdapter.js
@@ -31,7 +31,7 @@ const API_METHOD_KEY_RESET_TRUST             = "key_reset_trust";
 const API_METHOD_KEY_RESET_USER              = "key_reset_user";
 const API_METHOD_KEY_RESET_IDENTITY          = "key_reset_identity";
 const API_METHOD_KEY_RESET_ALL_OWN_KEYS      = "key_reset_all_own_keys";
-const API_METHOD_IMPORT_KEY                  = "import_key";
+const API_METHOD_IMPORT_KEY_WITH_FPR_RETURN  = "import_key_with_fpr_return";
 const API_METHOD_SET_OWN_KEY                 = "set_own_key";
 const API_METHOD_SET_COMM_PARTNER_KEY        = "set_comm_partner_key";
 
@@ -389,12 +389,12 @@ class pEpAdapter {
     });
   }
 
-  async import_key(keydata) {
+  async import_key_with_fpr_return(keydata) {
     this.log.info("pEpAdapter entry: import_key()", keydata);
-    const params = [keydata, keydata.length, ["OP"]];
+    const params = [keydata, keydata.length, ["OP"], ["OP"], 0];
     return this.delegateCallPepAdapter(
       SERVER_TYPE_CALL_FUNC,
-      API_METHOD_IMPORT_KEY,
+      API_METHOD_IMPORT_KEY_WITH_FPR_RETURN,
       params,
     ).then((response) => {
       if ((typeof (response) === "object") && response.hasOwnProperty("error")) {
@@ -404,11 +404,12 @@ class pEpAdapter {
       if (response.result.return.hasOwnProperty("status")) {
         switch (response.result.return.status) {
           case PEP_KEY_IMPORTED:
-            this.log.debug("import_key returned with success: ", response);
-            return response.result.outParams[0];
+            this.log.debug("import_key_with_fpr_return returned with success:", response);
+            // Identities for privated keys, FPRs.
+            return [response.result.outParams[2], response.result.outParams[1]];
 
           default:
-            this.checkError(API_METHOD_IMPORT_KEY, response);
+            this.checkError(API_METHOD_IMPORT_KEY_WITH_FPR_RETURN, response);
         }
       }
       // Hmm, no error and no result?