diff --git a/.gitignore b/.gitignore
index fbe718e92..d78a32620 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,4 @@ test_project/modoboa.db
 
 # Misc
 .ash_history
+modoboa.kdev4
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index cdd49f63a..fc1870a5a 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -7,7 +7,7 @@
   </template>
 
   <template v-else>
-    <navbar />
+    <navbar v-if="isAuthenticated" />
     <v-main>
       <v-container fluid>
         <transition name="fade">
diff --git a/frontend/src/components/domains/DNSDetail.vue b/frontend/src/components/domains/DNSDetail.vue
index 02a8207a7..d9340d561 100644
--- a/frontend/src/components/domains/DNSDetail.vue
+++ b/frontend/src/components/domains/DNSDetail.vue
@@ -122,7 +122,9 @@
           </v-chip>
         </v-col>
       </v-row>
-      <v-row v-if="value.enable_dkim">
+    </template>
+    <template v-if="value.enable_dkim">
+      <v-row>
         <v-col cols="3"><translate>DKIM key</translate></v-col>
         <v-col cols="9">
           <div v-if="value.dkim_private_key_path && value.dkim_public_key">
diff --git a/frontend/src/components/domains/DomainCreationForm.vue b/frontend/src/components/domains/DomainCreationForm.vue
index f2b4679f2..ebcf375ef 100644
--- a/frontend/src/components/domains/DomainCreationForm.vue
+++ b/frontend/src/components/domains/DomainCreationForm.vue
@@ -92,7 +92,7 @@ export default {
           items: [
             { key: this.$gettext('Quota'), value: this.domain.quota },
             { key: this.$gettext('Default mailbox quota'), value: this.domain.default_mailbox_quota },
-            { key: this.$gettext('Message sending limit'), value: this.domain.message_sending_limit }
+            { key: this.$gettext('Message sending limit'), value: this.domain.message_limit }
           ]
         }
       ]
diff --git a/frontend/src/components/domains/DomainDNSForm.vue b/frontend/src/components/domains/DomainDNSForm.vue
index ec08d7596..de54e36f7 100644
--- a/frontend/src/components/domains/DomainDNSForm.vue
+++ b/frontend/src/components/domains/DomainDNSForm.vue
@@ -3,12 +3,12 @@
   <v-switch
     :label="'Enable DNS checks' | translate"
     v-model="form.enable_dns_checks"
-    @input="update"
+    @change="update"
     />
   <v-switch
     :label="'Enable DKIM signing' | translate"
     v-model="form.enable_dkim"
-    @input="update"
+    @change="update"
     />
   <v-text-field
     :label="'DKIM key selector' | translate"
diff --git a/frontend/src/components/domains/DomainForm.vue b/frontend/src/components/domains/DomainForm.vue
index 35f4156ac..8f53b75b3 100644
--- a/frontend/src/components/domains/DomainForm.vue
+++ b/frontend/src/components/domains/DomainForm.vue
@@ -89,8 +89,8 @@
                 <v-col cols="6">
                   <translate class="mr-2">Quota: </translate> {{ domain.quota }}
                 </v-col>
-                <v-col cols="6" v-if="domain.message_sending_limit">
-                  <translate class="mr-2">Sending limit: </translate> {{ domain.message_sending_limit }}
+                <v-col cols="6" v-if="domain.message_limit">
+                  <translate class="mr-2">Sending limit: </translate> {{ domain.message_limit }}
                 </v-col>
                 <v-col cols="6" v-else>
                   <translate class="mr-2">No sending limit</translate>
@@ -207,7 +207,7 @@ export default {
       }
       this.working = true
       try {
-        const data = { ...this.editedDomain }
+        const data = JSON.parse(JSON.stringify(this.editedDomain))
         if (data.transport === null) {
           delete data.transport
         }
@@ -231,7 +231,7 @@ export default {
     domain: {
       handler: function (val) {
         if (val) {
-          this.editedDomain = JSON.parse(JSON.stringify(val))
+          this.editedDomain = { ...val }
         }
       },
       immediate: true
diff --git a/frontend/src/components/domains/DomainLimitationsForm.vue b/frontend/src/components/domains/DomainLimitationsForm.vue
index ba4b23e16..82ce575cd 100644
--- a/frontend/src/components/domains/DomainLimitationsForm.vue
+++ b/frontend/src/components/domains/DomainLimitationsForm.vue
@@ -38,7 +38,7 @@
       :label="'Message sending limit' | translate"
       :hint="'Number of messages this domain can send per day. Leave empty for no limit.' | translate"
       persistent-hint
-      v-model="form.message_sending_limit"
+      v-model="form.message_limit"
       :error-messages="errors"
       outlined
       @input="update"
@@ -49,9 +49,7 @@
 
 <script>
 export default {
-  props: {
-    value: Object
-  },
+  props: ['value'],
   data () {
     return {
       form: {}
@@ -65,12 +63,18 @@ export default {
       this.$emit('input', this.form)
     }
   },
+  mounted () {
+    this.form = { ...this.value }
+  },
   watch: {
     value: {
-      handler: function (newValue) {
-        this.form = { ...this.value }
+      handler (newValue) {
+        if (newValue.message_limit === '') {
+          newValue.message_limit = null
+        }
+        this.form = { ...newValue }
       },
-      immediate: true
+      deep: true
     }
   }
 }
diff --git a/frontend/src/components/domains/DomainSummary.vue b/frontend/src/components/domains/DomainSummary.vue
index 6567459f5..f94d24670 100644
--- a/frontend/src/components/domains/DomainSummary.vue
+++ b/frontend/src/components/domains/DomainSummary.vue
@@ -14,15 +14,17 @@
     </v-row>
     <v-row>
       <v-col cols="6"><translate>Quota</translate></v-col>
-      <v-col cols="6">{{ domain.quota }} <translate>MB</translate></v-col>
+      <v-col cols="6" v-if="domain.quota === '0'"><translate>Unlimited</translate></v-col>
+      <v-col cols="6" v-else>{{ domain.quota }} <translate>MB</translate></v-col>
     </v-row>
     <v-row>
       <v-col cols="6"><translate>Default mailbox quota</translate></v-col>
-      <v-col cols="6">{{ domain.default_mailbox_quota }} MB</v-col>
+      <v-col cols="6" v-if="domain.default_mailbox_quota === '0'"><translate>Unlimited</translate></v-col>
+      <v-col cols="6" v-else>{{ domain.default_mailbox_quota }} MB</v-col>
     </v-row>
-    <v-row v-if="domain.sending_limit !== undefined">
+    <v-row v-if="domain.message_limit !== undefined">
       <v-col cols="6"><translate>Daily sending limit</translate></v-col>
-      <v-col cols="6">{{ domain.sending_limit }} <translate>messages</translate></v-col>
+      <v-col cols="6">{{ domain.message_limit }} <translate>messages</translate></v-col>
     </v-row>
     <v-row>
       <v-col cols="6"><translate>Mailboxes</translate></v-col>
diff --git a/frontend/src/components/identities/AccountCreationForm.vue b/frontend/src/components/identities/AccountCreationForm.vue
index e52a84476..8b05020f8 100644
--- a/frontend/src/components/identities/AccountCreationForm.vue
+++ b/frontend/src/components/identities/AccountCreationForm.vue
@@ -50,6 +50,7 @@
 </template>
 
 <script>
+import { mapGetters } from 'vuex'
 import { bus } from '@/main'
 import accounts from '@/api/accounts'
 import AccountAliasForm from './AccountAliasForm'
@@ -70,6 +71,9 @@ export default {
     needsMailbox () {
       return this.account.role !== 'SuperAdmins' || (this.account.username && this.account.username.indexOf('@') !== -1)
     },
+    ...mapGetters({
+      authUser: 'auth/authUser'
+    }),
     summarySections () {
       const result = [
         {
diff --git a/frontend/src/components/identities/AccountForm.vue b/frontend/src/components/identities/AccountForm.vue
index e20ed7ba8..3564c4bc7 100644
--- a/frontend/src/components/identities/AccountForm.vue
+++ b/frontend/src/components/identities/AccountForm.vue
@@ -137,15 +137,37 @@
     <v-expansion-panel
       v-if="limitsConfig.params && limitsConfig.params.enable_admin_limits && account.role !== 'SimpleUsers' && account.role !== 'SuperAdmins'"
       >
-      <v-expansion-panel-header>
+      <v-expansion-panel-header v-slot="{ open }">
         <v-row no-gutters>
           <v-col cols="4">
             <translate>Resources</translate>
           </v-col>
+          <v-col
+            cols="8"
+            class="text--secondary"
+            >
+            <v-fade-transition leave-absolute>
+              <span v-if="open"></span>
+              <v-row
+                v-else
+                no-gutters
+                style="width: 100%"
+                >
+                <template v-if="account.resources != undefined && account.resources.length == 2">
+                  <v-col cols="6">
+                    <translate class="mr-2">Mailbox: </translate> <translate>Number of allowed mailboxes: </translate> {{ account.resources[0].max_value}}
+                  </v-col>
+                  <v-col cols="6">
+                  <translate class="mr-2">Mailbox aliases: </translate> <translate>Number of allowed mailbox aliases: </translate> {{ account.resources[1].max_value}}
+                  </v-col>
+                </template>
+              </v-row>
+            </v-fade-transition>
+          </v-col>
         </v-row>
       </v-expansion-panel-header>
       <v-expansion-panel-content>
-        <resources-form ref="resourcesForm" :resources="editedAccount.resources" />
+        <resources-form ref="resourcesForm" v-model="editedAccount.resources" />
       </v-expansion-panel-content>
     </v-expansion-panel>
   </v-expansion-panels>
@@ -161,6 +183,7 @@
 </template>
 
 <script>
+import { mapGetters } from 'vuex'
 import _isEmpty from 'lodash/isEmpty'
 import { bus } from '@/main'
 import accounts from '@/api/accounts'
@@ -183,7 +206,10 @@ export default {
   computed: {
     usernameIsEmail () {
       return this.editedAccount.username && this.editedAccount.username.indexOf('@') !== -1
-    }
+    },
+    ...mapGetters({
+      authUser: 'auth/authUser'
+    })
   },
   data () {
     return {
diff --git a/frontend/src/components/identities/AccountRoleForm.vue b/frontend/src/components/identities/AccountRoleForm.vue
index a56812bf3..955f8227b 100644
--- a/frontend/src/components/identities/AccountRoleForm.vue
+++ b/frontend/src/components/identities/AccountRoleForm.vue
@@ -29,12 +29,13 @@
 
 <script>
 import ChoiceField from '@/components/tools/ChoiceField'
+import { mapGetters } from 'vuex'
 
 export default {
   components: {
     ChoiceField
   },
-  props: ['value', 'account'],
+  props: ['value', 'account', 'role'],
   computed: {
     roleLabel () {
       const role = this.accountRoles.find(role => role.value === this.account.role)
@@ -43,29 +44,49 @@ export default {
     roleHelp () {
       const role = this.accountRoles.find(role => role.value === this.account.role)
       return role !== undefined ? role.help : ''
-    }
+    },
+    accountRoles () {
+      if (this.authUser.role === 'SuperAdmins') {
+        return [...this.domainAdminsRole, ...this.resellerRole, ...this.simpleUserRole, ...this.superAdminsRole]
+      } else if (this.authUser.role === 'DomainAdmins') {
+        return this.simpleUserRole
+      } else if (this.authUser.role === 'Resellers') {
+        return [...this.domainAdminsRole, ...this.simpleUserRole]
+      } else {
+        return []
+      }
+    },
+    ...mapGetters({
+      authUser: 'auth/authUser'
+    })
   },
   methods: {
     reset () { }
   },
   data () {
     return {
-      accountRoles: [
-        {
-          label: this.$gettext('Domain administrator'),
-          value: 'DomainAdmins',
-          help: this.$gettext('A user with privileges on one or more domain. He will be allowed to administer mailboxes and he can also have a mailbox.')
-        },
-        {
-          label: this.$gettext('Reseller'),
-          value: 'Resellers',
-          help: this.$gettext('help')
-        },
+      simpleUserRole: [
         {
           label: this.$gettext('Simple user'),
           value: 'SimpleUsers',
           help: this.$gettext('A user with no privileges but with a mailbox. He will be allowed to use all end-user features: webmail, calendar, contacts, filters.')
-        },
+        }
+      ],
+      domainAdminsRole: [
+        {
+          label: this.$gettext('Domain administrator'),
+          value: 'DomainAdmins',
+          help: this.$gettext('A user with privileges on one or more domain. He will be allowed to administer mailboxes and he can also have a mailbox.')
+        }
+      ],
+      resellerRole: [
+        {
+          label: this.$gettext('Reseller'),
+          value: 'Resellers',
+          help: this.$gettext('help')
+        }
+      ],
+      superAdminsRole: [
         {
           label: this.$gettext('Super administrator'),
           value: 'SuperAdmins',
diff --git a/frontend/src/components/identities/AccountSummary.vue b/frontend/src/components/identities/AccountSummary.vue
index 16f78b8d6..ac3571872 100644
--- a/frontend/src/components/identities/AccountSummary.vue
+++ b/frontend/src/components/identities/AccountSummary.vue
@@ -32,7 +32,10 @@
     <template v-if="account.mailbox">
       <v-row>
         <v-col cols="6"><translate>Quota</translate></v-col>
-        <v-col cols="6">
+        <v-col cols="6" v-if="account.mailbox.quota === '0'">
+          <translate>Unlimited</translate>
+        </v-col>
+        <v-col cols="6" v-else>
           <v-progress-linear
             :color="account.mailbox.quota_usage < 80 ? 'primary' : 'warning'"
             :value="account.mailbox.quota_usage"
diff --git a/frontend/src/components/layout/Navbar.vue b/frontend/src/components/layout/Navbar.vue
index b8b2da4f9..078d728e1 100644
--- a/frontend/src/components/layout/Navbar.vue
+++ b/frontend/src/components/layout/Navbar.vue
@@ -284,20 +284,18 @@ export default {
     }
   },
   created () {
-    if (this.isAuthenticated) {
-      parameters.getApplications().then(response => {
-        response.data.forEach(item => {
-          this.mainMenuItems[6].children.push({
-            text: item.label,
-            to: { name: 'ParametersEdit', params: { app: item.name } }
-          })
+    parameters.getApplications().then(response => {
+      response.data.forEach(item => {
+        this.mainMenuItems[6].children.push({
+          text: item.label,
+          to: { name: 'ParametersEdit', params: { app: item.name } }
         })
       })
-      parameters.getApplication('imap_migration').then(response => {
-        this.imapMigration = response.data.params.enabled_imapmigration
-      })
-      bus.$on('imapSettingsChanged', (status) => { this.imapMigration = status })
-    }
+    })
+    parameters.getApplication('imap_migration').then(response => {
+      this.imapMigration = response.data.params.enabled_imapmigration
+    })
+    bus.$on('imapSettingsChanged', (status) => { this.imapMigration = status })
   },
   methods: {
     displayMenuItem (item) {
diff --git a/modoboa/admin/api/v1/serializers.py b/modoboa/admin/api/v1/serializers.py
index c9d2ea9f3..c40d89c06 100644
--- a/modoboa/admin/api/v1/serializers.py
+++ b/modoboa/admin/api/v1/serializers.py
@@ -109,6 +109,15 @@ class DomainSerializer(serializers.ModelSerializer):
         domain.save(creator=creator)
         return domain
 
+    def update(self, instance, validated_data):
+        """Update domain and create/update transport."""
+        super().update(instance, validated_data)
+        _enable_dkim = validated_data.get("enable_dkim")
+        if _enable_dkim is False and instance.dkim_private_key_path != "":
+            instance.dkim_private_key_path = ""
+            instance.save()
+        return instance
+
 
 class DomainAliasSerializer(serializers.ModelSerializer):
     """Base DomainAlias serializer."""
diff --git a/modoboa/admin/api/v1/tests.py b/modoboa/admin/api/v1/tests.py
index 9545014ca..0c20b16a6 100644
--- a/modoboa/admin/api/v1/tests.py
+++ b/modoboa/admin/api/v1/tests.py
@@ -133,6 +133,16 @@ class DomainAPITestCase(ModoAPITestCase):
         domain.refresh_from_db()
         self.assertEqual(domain.name, "toto.test")
 
+    def test_remove_dkim_domain(self):
+        """Try to remove DKIM from a domain."""
+        domain = models.Domain.objects.get(name="test.com")
+        url = reverse("v1:domain-detail", args=[domain.pk])
+        response = self.client.put(
+            url, {"name": "test.com", "enable_dkim": False})
+        self.assertEqual(response.status_code, 200)
+        domain.refresh_from_db()
+        self.assertEqual(domain.dkim_private_key_path, "")
+
     def test_delete_domain(self):
         """Try to delete a domain."""
         domain = models.Domain.objects.get(name="test.com")
diff --git a/modoboa/admin/api/v1/viewsets.py b/modoboa/admin/api/v1/viewsets.py
index d417253e7..892be34d0 100644
--- a/modoboa/admin/api/v1/viewsets.py
+++ b/modoboa/admin/api/v1/viewsets.py
@@ -36,7 +36,9 @@ from . import serializers
         summary="Create a new domain"
     )
 )
-class DomainViewSet(GetThrottleViewsetMixin, lib_viewsets.RevisionModelMixin, viewsets.ModelViewSet):
+class DomainViewSet(GetThrottleViewsetMixin,
+                    lib_viewsets.RevisionModelMixin,
+                    viewsets.ModelViewSet):
     """Domain viewset."""
 
     permission_classes = [IsAuthenticated, DjangoModelPermissions, ]
diff --git a/modoboa/admin/forms/domain.py b/modoboa/admin/forms/domain.py
index 01375d217..c14bf067f 100644
--- a/modoboa/admin/forms/domain.py
+++ b/modoboa/admin/forms/domain.py
@@ -220,6 +220,9 @@ class DomainFormGeneral(forms.ModelForm, DynamicForm):
                 options = {"creator": user} if domalias_post_create else {}
                 DomainAlias(name=alias, target=d, enabled=d.enabled).save(
                     **options)
+        if self.cleaned_data.get("enable_dkim") is False and d.dkim_private_key_path != "":
+            d.dkim_private_key_path = ""
+            d.save()
         return d
 
 
diff --git a/modoboa/admin/management/commands/subcommands/_manage_dkim_keys.py b/modoboa/admin/management/commands/subcommands/_manage_dkim_keys.py
index 7c021b83b..e528809ed 100644
--- a/modoboa/admin/management/commands/subcommands/_manage_dkim_keys.py
+++ b/modoboa/admin/management/commands/subcommands/_manage_dkim_keys.py
@@ -74,13 +74,9 @@ class ManageDKIMKeys(BaseCommand):
                                                   dkim_private_key_path="")
             if domain.exists():
                 self.create_new_dkim_key(domain[0])
-                signals.new_dkim_keys.send(sender=self.__class__,
-                                           domains=domain)
             return
 
         qset = models.Domain.objects.filter(
             enable_dkim=True, dkim_private_key_path="")
         for domain in qset:
             self.create_new_dkim_key(domain)
-        if qset.exists():
-            signals.new_dkim_keys.send(sender=self.__class__, domains=qset)
diff --git a/modoboa/admin/signals.py b/modoboa/admin/signals.py
index 756ddb9c8..f5fdd32d4 100644
--- a/modoboa/admin/signals.py
+++ b/modoboa/admin/signals.py
@@ -19,5 +19,4 @@ get_domain_form_instances = django.dispatch.Signal() # Provides user, domain
 # get_domain_tags = django.dispatch.Signal(providing_args=["domain"])
 import_object = django.dispatch.Signal() # Provides objtype
 use_external_recipients = django.dispatch.Signal() # Provides recipients
-new_dkim_keys = django.dispatch.Signal() # Provides domain
 extra_account_identities_actions = django.dispatch.Signal() # Provides account
diff --git a/modoboa/admin/tests/test_domain.py b/modoboa/admin/tests/test_domain.py
index abf9593f4..e472ecef7 100644
--- a/modoboa/admin/tests/test_domain.py
+++ b/modoboa/admin/tests/test_domain.py
@@ -485,6 +485,19 @@ class DKIMTestCase(ModoTestCase):
         domain.refresh_from_db()
         self.assertNotEqual(domain.dkim_private_key_path, "")
 
+        # Try disabling DKIM and checking that dkim_private_key_path is emptied
+        values = {
+            "name": "pouet.com", "enable_dkim": False,
+            "quota": 1000, "default_mailbox_quota": 100,
+            "type": "domain"
+        }
+        self.ajax_post(
+            reverse("admin:domain_change", args=[domain.id]),
+            values
+        )
+        domain.refresh_from_db()
+        self.assertEqual(domain.dkim_private_key_path, "")
+
     def test_dkim_key_length_modification(self):
         """ """
         self.set_global_parameter("dkim_keys_storage_dir", self.workdir)
diff --git a/modoboa/pdfcredentials/handlers.py b/modoboa/pdfcredentials/handlers.py
index ba8e1ae53..cf8dfb360 100644
--- a/modoboa/pdfcredentials/handlers.py
+++ b/modoboa/pdfcredentials/handlers.py
@@ -1,5 +1,6 @@
 """PDF credentials handlers."""
 
+import logging
 import os
 
 from django.urls import reverse
@@ -10,6 +11,7 @@ from django.utils.translation import gettext as _
 from modoboa.admin import signals as admin_signals
 from modoboa.core import models as core_models
 from modoboa.core import signals as core_signals
+from modoboa.lib.exceptions import InternalError
 from modoboa.parameters import tools as param_tools
 
 from .documents import credentials
@@ -25,7 +27,13 @@ def password_updated(sender, account, password, created, **kwargs):
         "generate_at_creation")
     if (generate_at_creation and not created) or account.is_superuser:
         return
-    init_storage_dir()
+    try:
+        init_storage_dir()
+    except InternalError as e:
+        logger = logging.getLogger("modoboa.admin")
+        logger.error(
+            _("Failed to create PDF_credentials directory. "
+            "Please check the permissions or the path."))
     credentials(account, password)
 
 
diff --git a/modoboa/pdfcredentials/lib.py b/modoboa/pdfcredentials/lib.py
index 363703855..895e202ca 100644
--- a/modoboa/pdfcredentials/lib.py
+++ b/modoboa/pdfcredentials/lib.py
@@ -1,6 +1,7 @@
 """Internal library."""
 
 from io import BytesIO
+import logging
 import os
 import struct
 
@@ -18,7 +19,7 @@ from modoboa.parameters import tools as param_tools
 
 
 def init_storage_dir():
-    """Create the directory whare documents will be stored."""
+    """Create the directory where documents will be stored."""
     storage_dir = param_tools.get_global_parameter("storage_dir")
     if os.path.exists(storage_dir) and os.access(storage_dir, os.W_OK):
         return
@@ -66,17 +67,23 @@ def crypt_and_save_to_file(content, filename, length, chunksize=64*512):
     iv = os.urandom(16)
     cipher = _get_cipher(iv)
     encryptor = cipher.encryptor()
-    with open(filename, "wb") as fp:
-        fp.write(struct.pack(b"<Q", length))
-        fp.write(iv)
-        while True:
-            chunk = content.read(chunksize)
-            if not len(chunk):
-                break
-            elif len(chunk) % 16:
-                chunk += b" " * (16 - len(chunk) % 16)
-            fp.write(encryptor.update(force_bytes(chunk)))
-        fp.write(encryptor.finalize())
+    try:
+        with open(filename, "wb") as fp:
+            fp.write(struct.pack(b"<Q", length))
+            fp.write(iv)
+            while True:
+                chunk = content.read(chunksize)
+                if not len(chunk):
+                    break
+                elif len(chunk) % 16:
+                    chunk += b" " * (16 - len(chunk) % 16)
+                fp.write(encryptor.update(force_bytes(chunk)))
+            fp.write(encryptor.finalize())
+    except FileNotFoundError as e:
+        logger = logging.getLogger("modoboa.admin")
+        logger.error(
+            _("Failed to create PDF_credentials file. "
+            "Please check the permissions or the path."))
 
 
 def decrypt_file(filename, chunksize=24*1024):
diff --git a/modoboa/pdfcredentials/tests/test_views.py b/modoboa/pdfcredentials/tests/test_views.py
index 885528ffa..48f2d9508 100644
--- a/modoboa/pdfcredentials/tests/test_views.py
+++ b/modoboa/pdfcredentials/tests/test_views.py
@@ -144,4 +144,11 @@ class EventsTestCase(ModoTestCase):
     def test_storage_dir_creation(self):
         """Test storage directory creation."""
         self.set_global_parameter("storage_dir", "/nonexistentdir")
-        self._create_account("leon@test.com", expected_status=500)
+        with self.assertLogs(logger='modoboa.admin', level='ERROR') as log:
+            resp = self._create_account("leon@test.com")
+            self.assertIn(
+                "ERROR:modoboa.admin:Failed to create PDF_credentials directory. "
+                "Please check the permissions or the path.",
+                log.output
+            )
+
diff --git a/pyproject.toml b/pyproject.toml
index 24352bf6d..519a26022 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,18 +14,19 @@ authors = [
 ]
 description = "Mail hosting made simple"
 readme = "README.rst"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Environment :: Web Environment",
-    "Framework :: Django :: 2.2",
+    "Framework :: Django :: 4.2",
     "Intended Audience :: System Administrators",
     "License :: OSI Approved :: ISC License (ISCL)",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
     "Topic :: Communications :: Email",
     "Topic :: Internet :: WWW/HTTP",
 ]