diff --git a/app/views/user_notifications/digest.html.erb b/app/views/user_notifications/digest.html.erb
index fc187f6d48..ed0a0e3edd 100644
--- a/app/views/user_notifications/digest.html.erb
+++ b/app/views/user_notifications/digest.html.erb
@@ -125,7 +125,7 @@
   <tbody>
     <tr>
       <td class="digest-topic-op" style="color:#0a0a0a;line-height:1.3;margin:0 auto;padding:<%= rtl? ? '0 16px 0 0' : '0 0 0 16px' %>;width:50px;">
-        <img src="<%= t.user.small_avatar_url -%>" style="border-radius:50%;clear:both;display:block;float:none;height:50px;width:50px;margin:0;max-width:100%;outline:0;text-align:center;text-decoration:none;" align="center">
+        <img src="<%= t.user.small_avatar_url -%>" style="border-radius:50%;clear:both;display:block;float:none;height:50px;width:50px;margin:0;max-width:100%;outline:0;text-align:center;text-decoration:none;" align="center" alt="<%= t.user.username -%>">
       </td>
       <td style="color:#0a0a0a;padding:<%= rtl? ? '0 8px 0 16px' : '0 16px 0 8px' %>;vertical-align:top;">
         <% if t.user %>
@@ -137,7 +137,7 @@
       </td>
       <%- if show_image_with_url(t.image_url) && t.featured_link.nil? && !(@excerpts[t.first_post&.id]||"").include?(t.image_url) -%>
         <td style="margin:0;padding:<%= rtl? ? '0 8px 0 16px' : '0 16px 0 8px' %>;" align="right">
-          <img src="<%= url_for_email(t.image_url) -%>" height="64" style="margin:auto;max-height:64px;max-width:100%;outline:0;text-decoration:none;">
+          <img src="<%= url_for_email(t.image_url) -%>" height="64" style="margin:auto;max-height:64px;max-width:100%;outline:0;text-decoration:none;" alt="topic image">
         </td>
       <%- end -%>
     </tr>
@@ -160,17 +160,17 @@
   <tbody>
     <tr>
       <td class="digest-topic-stat" style="padding:<%= rtl? ? '0 16px 16px 8px' : '0 8px 16px 16px' %>;white-space:nowrap;vertical-align:top;width:75px">
-        <img class="digest-icon" src="<%= email_image_url 'heart.png' -%>" style="clear:both;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto">
+        <img class="digest-icon" src="<%= email_image_url 'heart.png' -%>" style="clear:both;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto" alt="likes">
         <p style="color:#8f8f8f;float:<%= rtl? ? 'right' : 'left' %>;line-height:1.3;margin:0 5px 10px 5px;padding:0;font-weight:400;"><%= t.like_count -%></p>
       </td>
       <td class="digest-topic-stat" style="padding:0 8px 16px 8px;white-space:nowrap;vertical-align:top;width:75px">
-        <img class="digest-icon" src="<%= email_image_url 'comment.png' -%>" style="clear:none;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto">
+        <img class="digest-icon" src="<%= email_image_url 'comment.png' -%>" style="clear:none;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto" alt="replies">
         <p style="color:#8f8f8f;float:<%= rtl? ? 'right' : 'left' %>;line-height:1.3;margin:0 5px 10px 5px;padding:0;font-weight:400;"><%= t.posts_count - 1 -%></p>
       </td>
       <td class="digest-topic-posters" style="padding:0 8px 16px 8px;white-space:nowrap;vertical-align:top;">
         <% t.posters_summary.each do |ps| %>
           <% if ps.user %>
-            <img src="<%= ps.user.small_avatar_url -%>" style="border-radius:50%;clear:both;display:inline-block;height:20px;width:20px;outline:0;text-decoration:none;">
+            <img src="<%= ps.user.small_avatar_url -%>" style="border-radius:50%;clear:both;display:inline-block;height:20px;width:20px;outline:0;text-decoration:none;" alt="<%= ps.user.username -%>">
           <% end %>
         <% end %>
       </td>
@@ -243,7 +243,7 @@
   <tbody>
     <tr>
       <td style="border-spacing:0;padding:0;color:#0a0a0a;line-height:1.3;padding:<%= rtl? ? '0 65px 0 0' : '0 0 0 65px' %>;">
-        <img src="<%= email_image_url 'right_triangle.png' -%>" style="clear:both;display:block;height:20px;width:20px;outline:0;text-decoration:none;">
+        <img src="<%= email_image_url 'right_triangle.png' -%>" style="clear:both;display:block;height:20px;width:20px;outline:0;text-decoration:none;" alt="">
       </td>
     </tr>
   </tbody>
@@ -253,7 +253,7 @@
   <tbody>
     <tr>
       <td style="padding:0 8px 8px 8px;width:50px;vertical-align:top;">
-        <img src="<%= post.user.small_avatar_url -%>" style="border-radius:50%;clear:both;display:block;height:50px;width:50px;outline:0;">
+        <img src="<%= post.user.small_avatar_url -%>" style="border-radius:50%;clear:both;display:block;height:50px;width:50px;outline:0;" alt="<%= post.user.username -%>">
       </td>
       <td style="color:#0a0a0a;line-height:1.3;padding:0 8px 8px 8px;vertical-align:top;">
         <% if post.user %>
@@ -323,16 +323,16 @@
       <td class="digest-new-topic-posters with-dir" style="padding:8px;">
         <% t.posters_summary[0,2].each do |ps| %>
           <% if ps.user %>
-            <img src="<%= ps.user.small_avatar_url -%>" style="height:20px;width:20px;margin:<%= rtl? ? '0 0 5px 5px' : '0 5px 5px 0' %>;border-radius:50%;clear:both;display:inline-block;outline:0;text-decoration:none;">
+            <img src="<%= ps.user.small_avatar_url -%>" style="height:20px;width:20px;margin:<%= rtl? ? '0 0 5px 5px' : '0 5px 5px 0' %>;border-radius:50%;clear:both;display:inline-block;outline:0;text-decoration:none;" alt="<%= ps.user.username -%>">
           <% end %>
         <% end %>
       </td>
       <td class="digest-new-topic-stat with-dir" style="padding:8px;">
-        <img class="digest-icon" src="<%= email_image_url 'heart.png' -%>" style="clear:both;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto">
+        <img class="digest-icon" src="<%= email_image_url 'heart.png' -%>" style="clear:both;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto" alt="likes">
         <p style="color:#8f8f8f;float:<%= rtl? ? 'right' : 'left' %>;line-height:1.3;margin:0 5px 10px 5px;padding:0;font-weight:400;"><%= t.like_count -%></p>
       </td>
       <td class="digest-new-topic-stat digest-replies with-dir" style="padding:8px;">
-        <img class="digest-icon" src="<%= email_image_url 'comment.png' -%>" style="clear:none;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto">
+        <img class="digest-icon" src="<%= email_image_url 'comment.png' -%>" style="clear:none;display:inline-block;float:<%= rtl? ? 'right' : 'left' %>;height:20px;margin:0;max-width:100%;opacity:.4;outline:0;text-decoration:none;width:auto" alt="replies">
         <p style="color:#8f8f8f;float:<%= rtl? ? 'right' : 'left' %>;line-height:1.3;margin:0 5px 10px 5px;padding:0;font-weight:400;"><%= t.posts_count - 1 -%></p>
       </td>
     </tr>