diff --git a/modoboa/admin/forms/alias.py b/modoboa/admin/forms/alias.py
index 8195d5613..75f9d2745 100644
--- a/modoboa/admin/forms/alias.py
+++ b/modoboa/admin/forms/alias.py
@@ -20,6 +20,7 @@ from ..models import Domain, Alias
 class AliasForm(forms.ModelForm, DynamicForm):
     """A form to create/modify an alias."""
 
+    random_address = forms.BooleanField(required=False)
     address = lib_fields.UTF8AndEmptyUserEmailField(
         label=ugettext_lazy("Email address"),
         help_text=ugettext_lazy(
@@ -39,16 +40,27 @@ class AliasForm(forms.ModelForm, DynamicForm):
 
     class Meta:
         model = Alias
-        fields = ("address", "enabled", )
+        fields = ("address", "domain", "enabled", "expire_at", "description")
+        widgets = {
+            "domain": forms.widgets.Select(
+                attrs={"class": "selectpicker", "data-live-search": "true"})
+        }
 
     def __init__(self, user, *args, **kwargs):
         self.user = user
         super(AliasForm, self).__init__(*args, **kwargs)
         self.fields = OrderedDict(
             (key, self.fields[key]) for key in
-            ['address', 'recipients', 'enabled']
+            ["random_address", "address", "domain", "recipients", "enabled",
+             "expire_at", "description"]
         )
-
+        if self.instance.pk:
+            del self.fields["random_address"]
+            del self.fields["domain"]
+        else:
+            self.fields["address"].required = False
+            self.fields["domain"].required = False
+            self.fields["domain"].queryset = Domain.objects.get_for_admin(user)
         if len(args) and isinstance(args[0], QueryDict):
             if "instance" in kwargs:
                 if not kwargs["instance"].domain.enabled:
@@ -66,6 +78,8 @@ class AliasForm(forms.ModelForm, DynamicForm):
 
     def clean_address(self):
         """Check if address points to a local domain."""
+        if not self.cleaned_data["address"]:
+            return self.cleaned_data["address"]
         localpart, domname = split_mailbox(self.cleaned_data["address"])
         try:
             domain = Domain.objects.get(name=domname)
@@ -87,6 +101,12 @@ class AliasForm(forms.ModelForm, DynamicForm):
     def clean(self):
         """Check it there is at least one recipient."""
         super(AliasForm, self).clean()
+        random_address = self.cleaned_data.get("random_address")
+        if not random_address:
+            if not self.cleaned_data.get("address"):
+                self.add_error("address", _("This field is required"))
+        elif not self.cleaned_data.get("domain"):
+            self.add_error("domain", _("This field is required"))
         for field, value in self.cleaned_data.items():
             if field.startswith("recipients") and value:
                 return self.cleaned_data
@@ -96,8 +116,12 @@ class AliasForm(forms.ModelForm, DynamicForm):
     def save(self, commit=True):
         """Custom save method."""
         alias = super(AliasForm, self).save(commit=False)
-        local_part, domname = split_mailbox(self.cleaned_data["address"])
-        alias.domain = Domain.objects.get(name=domname)
+        if self.cleaned_data.get("random_address"):
+            alias.address = "{}@{}".format(
+                Alias.generate_random_address(), alias.domain)
+        else:
+            local_part, domname = split_mailbox(self.cleaned_data["address"])
+            alias.domain = Domain.objects.get(name=domname)
         if commit:
             alias.save()
             address_list = [
diff --git a/modoboa/admin/migrations/0005_auto_20160719_0903.py b/modoboa/admin/migrations/0005_auto_20160719_0903.py
new file mode 100644
index 000000000..343ac82b1
--- /dev/null
+++ b/modoboa/admin/migrations/0005_auto_20160719_0903.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.5 on 2016-07-19 07:03
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('admin', '0004_auto_20160608_1423'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='alias',
+            name='description',
+            field=models.TextField(blank=True),
+        ),
+        migrations.AddField(
+            model_name='alias',
+            name='expire_at',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]
diff --git a/modoboa/admin/models/alias.py b/modoboa/admin/models/alias.py
index c31147e56..c277f97a8 100644
--- a/modoboa/admin/models/alias.py
+++ b/modoboa/admin/models/alias.py
@@ -1,5 +1,8 @@
 """Models related to aliases management."""
 
+import hashlib
+import random
+
 from django.core.urlresolvers import reverse
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible, smart_text
@@ -37,6 +40,8 @@ class Alias(AdminObject):
         default=True
     )
     internal = models.BooleanField(default=False)
+    description = models.TextField(blank=True)
+    expire_at = models.DateTimeField(blank=True, null=True)
     _objectname = 'MailboxAlias'
 
     class Meta:
@@ -50,6 +55,14 @@ class Alias(AdminObject):
     def __str__(self):
         return smart_text(self.address)
 
+    @classmethod
+    def generate_random_address(self):
+        """Generate a random address (local part)."""
+        m = hashlib.md5()
+        for x in random.sample(xrange(10000000), 60):
+            m.update(str(x))
+        return m.hexdigest()[:20]
+
     @property
     def identity(self):
         return self.address
diff --git a/modoboa/admin/postfix_maps.py b/modoboa/admin/postfix_maps.py
index 72cf8df24..a0640a131 100644
--- a/modoboa/admin/postfix_maps.py
+++ b/modoboa/admin/postfix_maps.py
@@ -52,17 +52,17 @@ class AliasesMap(object):
     mysql = (
         "SELECT alr.address FROM modoboa_admin_aliasrecipient AS alr "
         "INNER JOIN admin_alias AS al ON alr.alias_id=al.id "
-        "WHERE al.enabled=1 AND al.address='%s'"
+        "WHERE al.enabled=1 AND al.address='%s' AND al.expire_at>now()"
     )
     postgres = (
         "SELECT alr.address FROM modoboa_admin_aliasrecipient AS alr "
         "INNER JOIN admin_alias AS al ON alr.alias_id=al.id "
-        "WHERE al.enabled AND al.address='%s'"
+        "WHERE al.enabled AND al.address='%s' AND al.expire_at>now()"
     )
     sqlite = (
         "SELECT alr.address FROM modoboa_admin_aliasrecipient AS alr "
         "INNER JOIN admin_alias AS al ON alr.alias_id=al.id "
-        "WHERE al.enabled=1 AND al.address='%s'"
+        "WHERE al.enabled=1 AND al.address='%s' AND al.expire_at>now()"
     )
 
 
diff --git a/modoboa/admin/static/admin/js/admin.js b/modoboa/admin/static/admin/js/admin.js
index ca52954da..bb3a64c51 100644
--- a/modoboa/admin/static/admin/js/admin.js
+++ b/modoboa/admin/static/admin/js/admin.js
@@ -552,6 +552,15 @@ Identities.prototype = {
     },
 
     aliasform_cb: function() {
+        $("#id_random_address").click(function(evt) {
+            if ($(this).prop("checked")) {
+                $("#id_address").parents(".form-group").hide();
+                $("#id_domain").parents(".form-group").show();
+            } else {
+                $("#id_address").parents(".form-group").show();
+                $("#id_domain").parents(".form-group").hide();
+            }
+        });
         $("#id_address").autocompleter({
             from_character: "@",
             choices: $.proxy(this.get_domain_list, this)
@@ -565,6 +574,9 @@ Identities.prototype = {
                 return true;
             }
         });
+        $("#id_expire_at").datetimepicker({
+            format: 'YYYY-MM-DD HH:mm:ss'
+        });
         $(".submit").on('click', $.proxy(function(e) {
             simple_ajax_form_post(e, {
                 formid: "aliasform",
diff --git a/modoboa/admin/templates/admin/alias_detail.html b/modoboa/admin/templates/admin/alias_detail.html
index 01d49a6dc..6e00125ec 100644
--- a/modoboa/admin/templates/admin/alias_detail.html
+++ b/modoboa/admin/templates/admin/alias_detail.html
@@ -25,6 +25,12 @@
           <dl class="dl-horizontal">
             <dt>{% trans "Created" %}</dt><dd>{{ alias.creation|date:"SHORT_DATETIME_FORMAT" }}</dd>
             <dt>{% trans "Modified" %}</dt><dd>{{ alias.last_modification|date:"SHORT_DATETIME_FORMAT" }}</dd>
+            {% if alias.expire_at %}
+              <dt>{% trans "Expire at" %}</dt><dd>{{ alias.expire_at|date:"SHORT_DATETIME_FORMAT" }}</dd>
+            {% endif %}
+            {% if alias.description %}
+              <dt>{% trans "Description" %}</dt><dd>{{ alias.description }}</dd>
+            {% endif %}
           </dl>
         </div>
         <table class="table">
diff --git a/modoboa/admin/templates/admin/aliasform.html b/modoboa/admin/templates/admin/aliasform.html
index af9b43954..934028565 100644
--- a/modoboa/admin/templates/admin/aliasform.html
+++ b/modoboa/admin/templates/admin/aliasform.html
@@ -1,10 +1,17 @@
-{% extends "common/generic_modal_form.html" %}{% load form_tags %}
+{% extends "common/generic_modal_form.html" %}
+
+{% load form_tags %}
+
 {% block formbody %}
-{% render_field form.address %}
-{% render_fields_group form "recipients" %}
-{% if not form.instance.pk or form.instance.domain.enabled %}
-{% render_field form.enabled %}
-{% else %}
-{% include "common/generic_field.html" with field=form.enabled label_width="col-sm-4" inline_message=_("Domain is disabled") extra_classes="info" %}
-{% endif %}
+  {% if form.random_address %}{% render_field form.random_address %}{% endif %}
+  {% render_field form.address %}
+  {% if form.domain %}{% render_field form.domain hidden=True %}{% endif %}
+  {% render_fields_group form "recipients" %}
+  {% if not form.instance.pk or form.instance.domain.enabled %}
+    {% render_field form.enabled %}
+  {% else %}
+    {% include "common/generic_field.html" with field=form.enabled label_width="col-sm-4" inline_message=_("Domain is disabled") extra_classes="info" %}
+  {% endif %}
+  {% render_field form.expire_at %}
+  {% render_field form.description %}
 {% endblock %}
diff --git a/modoboa/admin/tests/test_alias.py b/modoboa/admin/tests/test_alias.py
index 3a7a4b162..926b2eabf 100644
--- a/modoboa/admin/tests/test_alias.py
+++ b/modoboa/admin/tests/test_alias.py
@@ -8,7 +8,7 @@ from modoboa.core.models import User
 from modoboa.lib.tests import ModoTestCase
 
 from .. import factories
-from ..models import Alias, AliasRecipient
+from ..models import Alias, AliasRecipient, Domain
 
 
 class AliasTestCase(ModoTestCase):
@@ -126,11 +126,13 @@ class AliasTestCase(ModoTestCase):
         )
 
     def test_dlist(self):
-        values = dict(address="all@test.com",
-                      recipients="user@test.com",
-                      recipients_1="admin@test.com",
-                      recipients_2="ext@titi.com",
-                      enabled=True)
+        values = {
+            "address": "all@test.com",
+            "recipients": "user@test.com",
+            "recipients_1": "admin@test.com",
+            "recipients_2": "ext@titi.com",
+            "enabled": True
+        }
         self.ajax_post(
             reverse("admin:alias_add"), values
         )
@@ -214,6 +216,18 @@ class AliasTestCase(ModoTestCase):
             reverse("admin:alias_add"), values
         )
 
+    def test_random_alias(self):
+        """Test creation of a random alias."""
+        alias_count = Alias.objects.count()
+        values = {
+            "random_address": True,
+            "domain": Domain.objects.get(name="test.com").pk,
+            "recipients": "user@test.com",
+            "enabled": True
+        }
+        self.ajax_post(reverse("admin:alias_add"), values)
+        self.assertEqual(Alias.objects.count(), alias_count + 1)
+
     def test_distribution_list_deletion_on_user_update_bug(self):
         """This test demonstrates an issue with distribution list being
            deleted when one of the users which belong to that list is