diff --git a/Userland/Applications/Mail/InboxModel.cpp b/Userland/Applications/Mail/InboxModel.cpp
index be1577c9ed..657d472a2a 100644
--- a/Userland/Applications/Mail/InboxModel.cpp
+++ b/Userland/Applications/Mail/InboxModel.cpp
@@ -6,6 +6,7 @@
  */
 
 #include "InboxModel.h"
+#include <LibGfx/Font/FontDatabase.h>
 
 InboxModel::InboxModel(Vector<InboxEntry> entries)
     : m_entries(move(entries))
@@ -46,5 +47,9 @@ GUI::Variant InboxModel::data(GUI::ModelIndex const& index, GUI::ModelRole role)
         if (index.column() == Column::Date)
             return Gfx::TextAlignment::CenterRight;
     }
+    if (role == GUI::ModelRole::Font) {
+        if (!value.seen)
+            return Gfx::FontDatabase::default_font().bold_variant();
+    }
     return {};
 }
diff --git a/Userland/Applications/Mail/InboxModel.h b/Userland/Applications/Mail/InboxModel.h
index 4ce4cc3351..b8c0c0e2e3 100644
--- a/Userland/Applications/Mail/InboxModel.h
+++ b/Userland/Applications/Mail/InboxModel.h
@@ -14,6 +14,7 @@ struct InboxEntry {
     DeprecatedString from;
     DeprecatedString subject;
     DeprecatedString date;
+    bool seen;
 };
 
 class InboxModel final : public GUI::Model {
diff --git a/Userland/Applications/Mail/MailWidget.cpp b/Userland/Applications/Mail/MailWidget.cpp
index 9ff75e240f..7024b8bc63 100644
--- a/Userland/Applications/Mail/MailWidget.cpp
+++ b/Userland/Applications/Mail/MailWidget.cpp
@@ -290,6 +290,9 @@ void MailWidget::selected_mailbox()
                     .headers = { { "Date", "Subject", "From" } },
                 },
             },
+            IMAP::FetchCommand::DataItem {
+                .type = IMAP::FetchCommand::DataItemType::Flags,
+            },
         },
     };
 
@@ -309,6 +312,8 @@ void MailWidget::selected_mailbox()
         auto& response_data = fetch_data.get<IMAP::FetchResponseData>();
         auto& body_data = response_data.body_data();
 
+        auto seen = !response_data.flags().find_if([](StringView value) { return value.equals_ignoring_ascii_case("\\Seen"sv); }).is_end();
+
         auto data_item_has_header = [](IMAP::FetchCommand::DataItem const& data_item, DeprecatedString const& search_header) {
             if (!data_item.section.has_value())
                 return false;
@@ -415,7 +420,7 @@ void MailWidget::selected_mailbox()
         if (from.is_empty())
             from = "(Unknown sender)";
 
-        InboxEntry inbox_entry { from, subject, date };
+        InboxEntry inbox_entry { from, subject, date, seen };
         m_statusbar->set_text(String::formatted("[{}]: Loading entry {}", mailbox.name, ++i).release_value_but_fixme_should_propagate_errors());
 
         active_inbox_entries.append(inbox_entry);