diff --git a/app/mailers/user_mailer.rb b/app/mailers/user_mailer.rb
index 7821be32b2e3c193a85ff77d5e48f3b3323dc7ab..a7efa73c1c7219e70d69759ac675c63f613cff9c 100644
--- a/app/mailers/user_mailer.rb
+++ b/app/mailers/user_mailer.rb
@@ -5,6 +5,8 @@ class UserMailer < Devise::Mailer
 
   helper :instance
 
+  add_template_helper RoutingHelper
+
   def confirmation_instructions(user, token, **)
     @resource = user
     @token    = token
diff --git a/app/views/layouts/mailer.html.haml b/app/views/layouts/mailer.html.haml
index 8a7ce43691f9b2e15cdfeb1f752f2deef15c82ee..e41b910699eb275a3e07eacfecaaacf8d7cf2f81 100644
--- a/app/views/layouts/mailer.html.haml
+++ b/app/views/layouts/mailer.html.haml
@@ -24,7 +24,7 @@
                               %tr
                                 %td.column-cell
                                   = link_to root_url do
-                                    = image_tag asset_pack_path('logo_full.svg'), height: 34, class: 'logo'
+                                    = image_tag full_pack_url('logo_full.svg'), alt: 'Mastodon', height: 34, class: 'logo'
 
     = yield
 
@@ -52,4 +52,4 @@
                             %tbody
                               %td.column-cell.text-right
                                 = link_to root_url do
-                                  = image_tag asset_pack_path('logo_transparent.svg'), height: 24
+                                  = image_tag full_pack_url('logo_transparent.svg'), alt: 'Mastodon', height: 24
diff --git a/app/views/user_mailer/confirmation_instructions.html.haml b/app/views/user_mailer/confirmation_instructions.html.haml
index 7a148ec7273cf84759ad632f8eb2261e537966c3..0f999bcbcb28afb14872a0621fbbe6d5473a9dfe 100644
--- a/app/views/user_mailer/confirmation_instructions.html.haml
+++ b/app/views/user_mailer/confirmation_instructions.html.haml
@@ -17,7 +17,7 @@
                                 %tbody
                                   %tr
                                     %td
-                                      = image_tag asset_pack_path('icon_email.svg')
+                                      = image_tag full_pack_url('icon_email.svg'), alt: ''
 
                               %h1= t 'devise.mailer.confirmation_instructions.title'
 
diff --git a/app/views/user_mailer/email_changed.html.haml b/app/views/user_mailer/email_changed.html.haml
index e526f3a2c29feb8013168f0a27a9df3e973d8b08..45dc066509009a04994ba82bc40dca6167c2d8ae 100644
--- a/app/views/user_mailer/email_changed.html.haml
+++ b/app/views/user_mailer/email_changed.html.haml
@@ -17,7 +17,7 @@
                                 %tbody
                                   %tr
                                     %td
-                                      = image_tag asset_pack_path('icon_email.svg')
+                                      = image_tag full_pack_url('icon_email.svg'), alt: ''
 
                               %h1= t 'devise.mailer.email_changed.title'
                               %p.lead= t 'devise.mailer.email_changed.explanation'
diff --git a/app/views/user_mailer/password_change.html.haml b/app/views/user_mailer/password_change.html.haml
index a0afd593058040196cb46bff095f21ef9881fa57..2e9377dff14b039e4a0c00633c2a53fa13a27a57 100644
--- a/app/views/user_mailer/password_change.html.haml
+++ b/app/views/user_mailer/password_change.html.haml
@@ -17,7 +17,7 @@
                                 %tbody
                                   %tr
                                     %td
-                                      = image_tag asset_pack_path('icon_lock_open.svg')
+                                      = image_tag full_pack_url('icon_lock_open.svg'), alt: ''
 
                               %h1= t 'devise.mailer.password_change.title'
                               %p.lead= t 'devise.mailer.password_change.explanation'
diff --git a/app/views/user_mailer/reconfirmation_instructions.html.haml b/app/views/user_mailer/reconfirmation_instructions.html.haml
index 52855e2232a459a6126ad675e2e2211fba122358..3ae226093931b4fc0ebc4cafc8f2a0e6fafdb78a 100644
--- a/app/views/user_mailer/reconfirmation_instructions.html.haml
+++ b/app/views/user_mailer/reconfirmation_instructions.html.haml
@@ -17,7 +17,7 @@
                                 %tbody
                                   %tr
                                     %td
-                                      = image_tag asset_pack_path('icon_email.svg')
+                                      = image_tag full_pack_url('icon_email.svg'), alt: ''
 
                               %h1= t 'devise.mailer.reconfirmation_instructions.title'
                               %p.lead= t 'devise.mailer.reconfirmation_instructions.explanation'
diff --git a/app/views/user_mailer/reset_password_instructions.html.haml b/app/views/user_mailer/reset_password_instructions.html.haml
index c6a9d4bf6e6a5bc8df392f7f010bf4fe89c6d5ec..c0e6775d4a9832c805a56f2cc6d1022e98a4cd38 100644
--- a/app/views/user_mailer/reset_password_instructions.html.haml
+++ b/app/views/user_mailer/reset_password_instructions.html.haml
@@ -17,7 +17,7 @@
                                 %tbody
                                   %tr
                                     %td
-                                      = image_tag asset_pack_path('icon_lock_open.svg')
+                                      = image_tag full_pack_url('icon_lock_open.svg'), alt: ''
 
                               %h1= t 'devise.mailer.reset_password_instructions.title'
                               %p.lead= t 'devise.mailer.reset_password_instructions.explanation'