diff --git a/doc/configuration.rst b/doc/configuration.rst
index df9bb4b5c..e41a5caf7 100644
--- a/doc/configuration.rst
+++ b/doc/configuration.rst
@@ -31,7 +31,7 @@ The *admin* application exposes several parameters, they are presented below:
 |Authentication type |General              |The backend used for           |Local               |
 |                    |                     |authentication                 |                    |
 +--------------------+---------------------+-------------------------------+--------------------+
-|Default password    |General              |Scheme used to crypt           |crypt               |
+|Default password    |General              |Scheme used to crypt           |sha512crypt         |
 |scheme              |                     |mailbox passwords              |                    |
 +--------------------+---------------------+-------------------------------+--------------------+
 |Rounds              |General              |Number of rounds (only used by |70000               |
@@ -144,6 +144,13 @@ The *admin* application exposes several parameters, they are presented below:
 |                    |                     |                               |                    |
 +--------------------+---------------------+-------------------------------+--------------------+
 
+.. warning::
+
+    If Dovecot is not running on the same host than Modoboa, you will have
+    to define which password schemes are supported. To do so, open the
+    :file:`settings.py` file and add a ``DOVECOT_SUPPORTED_SCHEMES``
+    variable with the output of the command: ``doveadm pw -l``.
+
 .. note::
 
    If you are not familiar with virtual domain hosting, you should
@@ -202,7 +209,11 @@ Host configuration
 .. note::
 
   This section is only relevant when Modoboa handles mailboxes
-  renaming and removal from the filesystem.
+  renaming and removal from the filesystem, which requires that
+  Dovecot is installed and running on this host. If it is installed
+  at a non-standard directory, paths to its binaries can be set in the
+  :file:`settings.py` file with the ``DOVECOT_LOOKUP_PATH`` and
+  ``DOVEADM_LOOKUP_PATH`` variables.
 
 To manipulate mailboxes on the filesystem, you must allow the user who
 runs Modoboa to execute commands as the user who owns mailboxes.
diff --git a/modoboa/admin/migrations/0019_auto_20210130_2226.py b/modoboa/admin/migrations/0019_auto_20210130_2226.py
new file mode 100644
index 000000000..7f3c902e7
--- /dev/null
+++ b/modoboa/admin/migrations/0019_auto_20210130_2226.py
@@ -0,0 +1,18 @@
+# Generated by Django 2.2.17 on 2021-01-30 22:26
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('admin', '0018_update_disabled_accounts_aliases'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='domain',
+            name='name',
+            field=models.CharField(help_text='The domain name', max_length=253, unique=True, verbose_name='name'),
+        ),
+    ]
diff --git a/modoboa/admin/models/domain.py b/modoboa/admin/models/domain.py
index b7db53700..282f9f887 100644
--- a/modoboa/admin/models/domain.py
+++ b/modoboa/admin/models/domain.py
@@ -23,7 +23,7 @@ from . import mixins
 class Domain(mixins.MessageLimitMixin, AdminObject):
     """Mail domain."""
 
-    name = models.CharField(ugettext_lazy("name"), max_length=100, unique=True,
+    name = models.CharField(ugettext_lazy("name"), max_length=253, unique=True,
                             help_text=ugettext_lazy("The domain name"))
     quota = models.PositiveIntegerField(
         default=0,
diff --git a/modoboa/core/commands/templates/settings.py.tpl b/modoboa/core/commands/templates/settings.py.tpl
index cab8a30e3..d393e9500 100644
--- a/modoboa/core/commands/templates/settings.py.tpl
+++ b/modoboa/core/commands/templates/settings.py.tpl
@@ -114,15 +114,15 @@ MIDDLEWARE = (
 )
 
 AUTHENTICATION_BACKENDS = (
-    # 'modoboa.lib.authbackends.LDAPBackend',
-    # 'modoboa.lib.authbackends.SMTPBackend',
+    #'modoboa.lib.authbackends.LDAPBackend',
+    #'modoboa.lib.authbackends.SMTPBackend',
     'django.contrib.auth.backends.ModelBackend',
 )
 
 # SMTP authentication
-# AUTH_SMTP_SERVER_ADDRESS = 'localhost'
-# AUTH_SMTP_SERVER_PORT = 25
-# AUTH_SMTP_SECURED_MODE = None  # 'ssl' or 'starttls' are accepted
+#AUTH_SMTP_SERVER_ADDRESS = 'localhost'
+#AUTH_SMTP_SERVER_PORT = 25
+#AUTH_SMTP_SECURED_MODE = None  # 'ssl' or 'starttls' are accepted
 
 
 TEMPLATES = [
@@ -202,9 +202,15 @@ SPECTACULAR_SETTINGS = {
 }
 
 # Modoboa settings
-# MODOBOA_CUSTOM_LOGO = os.path.join(MEDIA_URL, "custom_logo.png")
 
-# DOVECOT_LOOKUP_PATH = ('/path/to/dovecot', )
+#MODOBOA_CUSTOM_LOGO = os.path.join(MEDIA_URL, "custom_logo.png")
+
+# Path to Dovecot binaries in case of a non-standard installation
+#DOVECOT_LOOKUP_PATH = ('/path/to/dovecot', )
+#DOVEADM_LOOKUP_PATH = ('/path/to/doveadm', )
+
+# List of supported schemes if doveadm is not available, given by: doveadm pw -l
+#DOVECOT_SUPPORTED_SCHEMES = 'SHA512-CRYPT SHA256-CRYPT'
 
 MODOBOA_API_URL = 'https://api.modoboa.org/1/'
 
diff --git a/modoboa/core/password_hashers/__init__.py b/modoboa/core/password_hashers/__init__.py
index dbb399731..0a0b3f778 100644
--- a/modoboa/core/password_hashers/__init__.py
+++ b/modoboa/core/password_hashers/__init__.py
@@ -2,6 +2,7 @@
 Password hashers for Modoboa.
 """
 
+from django.conf import settings
 from django.utils.encoding import smart_text
 
 from modoboa.core.password_hashers.advanced import (  # NOQA:F401
@@ -32,17 +33,21 @@ def get_password_hasher(scheme):
 
 
 def get_dovecot_schemes():
-    """Return schemes supported by dovecot"""
-    supported_schemes = None
-    try:
-        _, schemes = doveadm_cmd("pw -l")
-    except OSError:
-        pass
-    else:
-        supported_schemes = ["{{{}}}".format(smart_text(scheme))
-                             for scheme in schemes.split()]
+    """Return schemes supported by Dovecot.
 
-    if not supported_schemes:
-        supported_schemes = ['{PLAIN}']
+    It first try to get supported schemes fron the settings, then from the
+    doveadm output, and fallback to {MD5-CRYPT} and {PLAIN} if the command
+    is not found.
 
-    return supported_schemes
+    :return: A list of supported '{SCHEME}'
+    """
+    schemes = getattr(settings, "DOVECOT_SUPPORTED_SCHEMES", None)
+
+    if not schemes:
+        try:
+            _, schemes = doveadm_cmd("pw -l")
+        except OSError:
+            schemes = "MD5-CRYPT PLAIN"
+
+    return ["{{{}}}".format(smart_text(scheme))
+            for scheme in schemes.split()]
diff --git a/modoboa/core/tests/test_authentication.py b/modoboa/core/tests/test_authentication.py
index 567edc01a..f7aa8b3ab 100644
--- a/modoboa/core/tests/test_authentication.py
+++ b/modoboa/core/tests/test_authentication.py
@@ -19,9 +19,9 @@ from modoboa.core.password_hashers import (
 from modoboa.lib.tests import NO_SMTP, ModoTestCase
 from .. import factories, models
 
+DOVEADM_TEST_PATH = "{}/doveadm".format(os.path.dirname(__file__))
+
 
-@override_settings(
-    DOVEADM_LOOKUP_PATH=["{}/doveadm".format(os.path.dirname(__file__))])
 class AuthenticationTestCase(ModoTestCase):
     """Validate authentication scenarios."""
 
@@ -89,6 +89,7 @@ class AuthenticationTestCase(ModoTestCase):
         self.assertEqual(response.status_code, 302)
         self.assertTrue(response.url.endswith(reverse("core:dashboard")))
 
+    @override_settings(DOVEADM_LOOKUP_PATH=[DOVEADM_TEST_PATH])
     def test_password_schemes(self):
         """Validate password scheme changes."""
         username = "user@test.com"
@@ -130,6 +131,7 @@ class AuthenticationTestCase(ModoTestCase):
         self.assertTrue(user.password.startswith(pw_hash.scheme))
 
     @skipUnless(argon2, "argon2-cffi not installed")
+    @override_settings(DOVEADM_LOOKUP_PATH=[DOVEADM_TEST_PATH])
     def test_password_argon2_parameter_change(self):
         """Validate hash parameter update on login works with argon2."""
         username = "user@test.com"
@@ -169,8 +171,9 @@ class AuthenticationTestCase(ModoTestCase):
         self.assertEqual(parameters.memory_cost, 1000)
         self.assertEqual(parameters.parallelism, 2)
 
-    def test_supported_schemes(self):
-        """Validate dovecot supported schemes."""
+    @override_settings(DOVEADM_LOOKUP_PATH=[DOVEADM_TEST_PATH])
+    def test_dovecot_supported_schemes(self):
+        """Validate Dovecot supported schemes with fake command output."""
         supported_schemes = get_dovecot_schemes()
         self.assertEqual(supported_schemes,
                          ["{MD5}",
@@ -204,6 +207,17 @@ class AuthenticationTestCase(ModoTestCase):
                           "{SHA256-CRYPT}",
                           "{SHA512-CRYPT}"])
 
+    @override_settings(DOVECOT_SUPPORTED_SCHEMES="SHA1 SHA512-CRYPT")
+    def test_dovecot_supported_schemes_from_settings(self):
+        """Validate dovecot supported schemes from the settings."""
+        supported_schemes = get_dovecot_schemes()
+        self.assertEqual(supported_schemes, ["{SHA1}", "{SHA512-CRYPT}"])
+
+    def test_dovecot_default_schemes(self):
+        """Check default scheme if doveadm is not found."""
+        supported_schemes = get_dovecot_schemes()
+        self.assertEqual(supported_schemes, ["{MD5-CRYPT}", "{PLAIN}"])
+
 
 class PasswordResetTestCase(ModoTestCase):
     """Test password reset service."""
diff --git a/setup.cfg b/setup.cfg
index 427c34916..947d97f8f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -21,3 +21,5 @@ max-line-length = 80
 [flake8]
 exclude = migrations
 max-line-length = 80
+per-file-ignores =
+    modoboa/core/commands/templates/settings.py.tpl: E265