Valid email domains added and tests passing.

app/main/forms.py

@@ -12,9 +12,9 @@ from wtforms import (
     HiddenField
 )
 from wtforms.fields.html5 import EmailField, TelField
-from wtforms.validators import DataRequired, Email, Length, Regexp
+from wtforms.validators import (DataRequired, Email, Length, Regexp)
 
-from app.main.validators import Blacklist, CsvFileValidator
+from app.main.validators import (Blacklist, CsvFileValidator, ValidEmailDomainRegex)
 
 from utils.recipients import (
     validate_phone_number,
@@ -24,13 +24,11 @@ from utils.recipients import (
 
 
 def email_address(label='Email address'):
-    gov_uk_email \
-        = "(^[^@^\\s]+@[^@^\\.^\\s]+(\\.[^@^\\.^\\s]*)*.gov.uk)"
     return EmailField(label, validators=[
         Length(min=5, max=255),
         DataRequired(message='Email cannot be empty'),
         Email(message='Enter a valid email address'),
-        Regexp(regex=gov_uk_email, message='Enter a gov.uk email address')])
+        ValidEmailDomainRegex()])
 
 
 class UKMobileNumber(TelField):

app/main/validators.py

@@ -1,3 +1,4 @@
+import re
 from wtforms import ValidationError
 from datetime import datetime
 from app.main.encryption import check_hash
@@ -22,3 +23,18 @@ class CsvFileValidator(object):
     def __call__(self, form, field):
         if not form.file.data.mimetype == 'text/csv':
             raise ValidationError(self.message)
+
+
+class ValidEmailDomainRegex(object):
+
+    def __call__(self, form, field):
+        from flask import (current_app, url_for)
+        message = (
+            'Enter a central government email address.'
+            ' If you think you should have access'
+            ' <a href="{}">contact us</a>').format(
+                "https://docs.google.com/forms/d/1AL8U-xJX_HAFEiQiJszGQw0PcEaEUnYATSntEghNDGo/viewform")
+        valid_domains = current_app.config.get('EMAIL_DOMAIN_REGEXES', [])
+        email_regex = "(^[^@^\\s]+@[^@^\\.^\\s]+(\\.[^@^\\.^\\s]*)*.({}))".format("|".join(valid_domains))
+        if not re.match(email_regex, field.data):
+            raise ValidationError(message)

app/templates/components/textbox.html

@@ -7,7 +7,8 @@
   help_link_text=None,
   width='2-3',
   suffix=None,
-  disabled=False
+  disabled=False,
+  safe_error_message=False
 ) %}
   <div class="form-group{% if field.errors %} error{% endif %}" {% if autofocus %}data-module="autofocus"{% endif %}>
     <label class="form-label" for="{{ field.name }}">
@@ -19,7 +20,7 @@
       {% endif %}
       {% if field.errors %}
         <span class="error-message">
-          {{ field.errors[0] }}
+          {% if not safe_error_message %}{{ field.errors[0] }}{% else %}{{ field.errors[0]|safe }}{% endif %}
         </span>
       {% endif %}
     </label>

app/templates/views/email-not-received.html

@@ -15,7 +15,7 @@
     <p>Check your email address is correct and then resend the confirmation code.</p>
 
     <form autocomplete="off" method="post">
-      {{ textbox(form.email_address, hint='Your email address must end in .gov.uk') }}
+      {{ textbox(form.email_address, hint='You must use an email address from a central government organisation', safe_error_message=True) }}
       {{ page_footer('Resend confirmation code') }}
     </form>
   </div>

app/templates/views/forgot-password.html

@@ -15,7 +15,7 @@ Create a new password – GOV.UK Notify
     <p>If you have forgotten your password, we can send you an email to create a new password.</p>
 
     <form autocomplete="off" method="post">
-      {{ textbox(form.email_address) }}
+      {{ textbox(form.email_address, safe_error_message=True) }}
       {{ page_footer("Send email") }}
     </form>
 

app/templates/views/invite-user.html

@@ -16,7 +16,7 @@ Manage users – GOV.UK Notify
   <div class="grid-row">
     <form method="post" class="column-three-quarters">
 
-      {{ textbox(form.email_address, hint='Email address must end in .gov.uk', width='1-1') }}
+      {{ textbox(form.email_address, hint='You must use an email address from a central government organisation', width='1-1', safe_error_message=True) }}
 
       <fieldset class='yes-no-wrapper'>
         <legend class='heading-small'>

app/templates/views/register.html

@@ -16,7 +16,7 @@ Create an account – GOV.UK Notify
 
     <form method="post" autocomplete="nope">
       {{ textbox(form.name, width='3-4') }}
-      {{ textbox(form.email_address, hint="Your email address must end in .gov.uk", width='3-4') }}
+      {{ textbox(form.email_address, hint="You must use an email address from a central government organisation", width='3-4', safe_error_message=True) }}
       {{ textbox(form.mobile_number, width='3-4') }}
       {{ textbox(form.password, hint="Your password must have at least 10 characters", width='3-4') }}
       {{ page_footer("Continue") }}

app/templates/views/user-profile/change.html

@@ -18,7 +18,7 @@ GOV.UK Notify | Service settings
     {% endif %}
     <div class="column-three-quarters">
       <form method="post">
-        {{ textbox(form_field) }}
+        {{ textbox(form_field, safe_error_message=True) }}
         {{ page_footer(
           'Save',
           back_link=url_for('.user_profile'),