use email host

app/views/submitter_mailer/invitation_email.html.erb

@@ -7,7 +7,7 @@
 <% else %>
   <p><%= t('hi_there') %>,</p>
   <p><%= I18n.t(@submitter.with_signature_fields? ? :you_have_been_invited_to_sign_the_name : :you_have_been_invited_to_submit_the_name_form, name: @submitter.submission.template.name) %></p>
-  <p><%= link_to I18n.t(@submitter.with_signature_fields? ? :review_and_sign : :review_and_submit), submit_form_url(slug: @submitter.slug, t: SubmissionEvents.build_tracking_param(@submitter, 'click_email')) %></p>
+  <p><%= link_to I18n.t(@submitter.with_signature_fields? ? :review_and_sign : :review_and_submit), submit_form_url(slug: @submitter.slug, t: SubmissionEvents.build_tracking_param(@submitter, 'click_email'), host: ENV.fetch('EMAIL_HOST', Docuseal.default_url_options[:host])) %></p>
   <p><%= t('please_contact_us_by_replying_to_this_email_if_you_didn_t_request_this') %></p>
   <p>
   <%= t('thanks') %>,<br><%= @current_account.name %>