diff --git a/core/admin/mailu/ui/views/domains.py b/core/admin/mailu/ui/views/domains.py
index b39657f1..4cdd830a 100644
--- a/core/admin/mailu/ui/views/domains.py
+++ b/core/admin/mailu/ui/views/domains.py
@@ -1,4 +1,4 @@
-from mailu import models
+from mailu import models, utils
 from mailu.ui import ui, forms, access
 from flask import current_app as app
 
@@ -93,12 +93,8 @@ def domain_signup(domain_name=None):
         del form.pw
         del form.pw2
     if form.validate_on_submit():
-        if not flask_login.current_user.is_authenticated and len(form.pw.data) < 8:
-            flask.flash("This password is too short.", "error")
-            return flask.render_template('domain/signup.html', form=form)
-        breaches = int(form.pwned.data)
-        if breaches > 0:
-            flask.flash(f"This password appears in {breaches} data breaches! Please change it.", "error")
+        if msg := utils.isBadOrPwned(form):
+            flask.flash(msg, "error")
             return flask.render_template('domain/signup.html', form=form)
         conflicting_domain = models.Domain.query.get(form.name.data)
         conflicting_alternative = models.Alternative.query.get(form.name.data)
diff --git a/core/admin/mailu/ui/views/users.py b/core/admin/mailu/ui/views/users.py
index 3fe96109..85a5c2db 100644
--- a/core/admin/mailu/ui/views/users.py
+++ b/core/admin/mailu/ui/views/users.py
@@ -1,4 +1,4 @@
-from mailu import models
+from mailu import models, utils
 from mailu.ui import ui, access, forms
 from flask import current_app as app
 
@@ -28,13 +28,8 @@ def user_create(domain_name):
         form.quota_bytes.validators = [
             wtforms.validators.NumberRange(max=domain.max_quota_bytes)]
     if form.validate_on_submit():
-        if len(form.pw.data) < 8:
-            flask.flash("This password is too short.", "error")
-            return flask.render_template('user/create.html',
-                domain=domain, form=form)
-        breaches = int(form.pwned.data)
-        if breaches > 0:
-            flask.flash(f"This password appears in {breaches} data breaches! Please change it.", "error")
+        if msg := utils.isBadOrPwned(form):
+            flask.flash(msg, "error")
             return flask.render_template('user/create.html',
                 domain=domain, form=form)
         if domain.has_email(form.localpart.data):
@@ -69,13 +64,8 @@ def user_edit(user_email):
         form.quota_bytes.validators = [
             wtforms.validators.NumberRange(max=max_quota_bytes)]
     if form.validate_on_submit():
-        if len(form.pw.data) < 8:
-            flask.flash("This password is too short.", "error")
-            return flask.render_template('user/edit.html', form=form, user=user,
-                domain=user.domain, max_quota_bytes=max_quota_bytes)
-        breaches = int(form.pwned.data)
-        if breaches > 0:
-            flask.flash(f"This password appears in {breaches} data breaches! Please change it.", "error")
+        if msg := utils.isBadOrPwned(form):
+            flask.flash(msg, "error")
             return flask.render_template('user/edit.html', form=form, user=user,
                 domain=user.domain, max_quota_bytes=max_quota_bytes)
         form.populate_obj(user)
@@ -137,12 +127,8 @@ def user_password(user_email):
         if form.pw.data != form.pw2.data:
             flask.flash('Passwords do not match', 'error')
         else:
-            if len(form.pw.data) < 8:
-                flask.flash("This password is too short.", "error")
-                return flask.render_template('user/password.html', form=form, user=user)
-            breaches = int(form.pwned.data)
-            if breaches > 0:
-                flask.flash(f"This password appears in {breaches} data breaches! Please change it.", "error")
+            if msg := utils.isBadOrPwned(form):
+                flask.flash(msg, "error")
                 return flask.render_template('user/password.html', form=form, user=user)
             flask.session.regenerate()
             user.set_password(form.pw.data)
@@ -195,12 +181,8 @@ def user_signup(domain_name=None):
         if domain.has_email(form.localpart.data) or models.Alias.resolve(form.localpart.data, domain_name):
             flask.flash('Email is already used', 'error')
         else:
-            if len(form.pw.data) < 8:
-                flask.flash("This password is too short.", "error")
-                return flask.render_template('user/signup.html', domain=domain, form=form)
-            breaches = int(form.pwned.data)
-            if breaches > 0:
-                flask.flash(f"This password appears in {breaches} data breaches! Please change it.", "error")
+            if msg := utils.isBadOrPwned(form):
+                flask.flash(msg, "error")
                 return flask.render_template('user/signup.html', domain=domain, form=form)
             flask.session.regenerate()
             user = models.User(domain=domain)
diff --git a/core/admin/mailu/utils.py b/core/admin/mailu/utils.py
index 7e208702..4c55e27d 100644
--- a/core/admin/mailu/utils.py
+++ b/core/admin/mailu/utils.py
@@ -507,3 +507,14 @@ def gen_temp_token(email, session):
             app.config['PERMANENT_SESSION_LIFETIME'],
     )
     return token
+
+def isBadOrPwned(form):
+        try:
+            if len(form.pw.data) < 8:
+                return "This password is too short."
+            breaches = int(form.pwned.data)
+        except ValueError:
+            breaches = -1
+        if breaches > 0:
+            return f"This password appears in {breaches} data breaches! It is not unique; please change it."
+    return None