diff --git a/app/core/src/main/java/com/fsck/k9/FontSizes.java b/app/core/src/main/java/com/fsck/k9/FontSizes.java
index f6c7ce7689..bc23ef2366 100644
--- a/app/core/src/main/java/com/fsck/k9/FontSizes.java
+++ b/app/core/src/main/java/com/fsck/k9/FontSizes.java
@@ -15,6 +15,7 @@ public class FontSizes {
     private static final String MESSAGE_LIST_SENDER = "fontSizeMessageListSender";
     private static final String MESSAGE_LIST_DATE = "fontSizeMessageListDate";
     private static final String MESSAGE_LIST_PREVIEW = "fontSizeMessageListPreview";
+    private static final String MESSAGE_VIEW_ACCOUNT_NAME = "fontSizeMessageViewAccountName";
     private static final String MESSAGE_VIEW_SENDER = "fontSizeMessageViewSender";
     private static final String MESSAGE_VIEW_RECIPIENTS = "fontSizeMessageViewTo";
     private static final String MESSAGE_VIEW_SUBJECT = "fontSizeMessageViewSubject";
@@ -36,6 +37,7 @@ public class FontSizes {
     private int messageListSender;
     private int messageListDate;
     private int messageListPreview;
+    private int messageViewAccountName;
     private int messageViewSender;
     private int messageViewRecipients;
     private int messageViewSubject;
@@ -50,6 +52,7 @@ public class FontSizes {
         messageListDate = FONT_DEFAULT;
         messageListPreview = FONT_DEFAULT;
 
+        messageViewAccountName = FONT_DEFAULT;
         messageViewSender = FONT_DEFAULT;
         messageViewRecipients = FONT_DEFAULT;
         messageViewSubject = FONT_DEFAULT;
@@ -65,6 +68,7 @@ public class FontSizes {
         editor.putInt(MESSAGE_LIST_DATE, messageListDate);
         editor.putInt(MESSAGE_LIST_PREVIEW, messageListPreview);
 
+        editor.putInt(MESSAGE_VIEW_ACCOUNT_NAME, messageViewAccountName);
         editor.putInt(MESSAGE_VIEW_SENDER, messageViewSender);
         editor.putInt(MESSAGE_VIEW_RECIPIENTS, messageViewRecipients);
         editor.putInt(MESSAGE_VIEW_SUBJECT, messageViewSubject);
@@ -80,6 +84,7 @@ public class FontSizes {
         messageListDate = storage.getInt(MESSAGE_LIST_DATE, messageListDate);
         messageListPreview = storage.getInt(MESSAGE_LIST_PREVIEW, messageListPreview);
 
+        messageViewAccountName = storage.getInt(MESSAGE_VIEW_ACCOUNT_NAME, messageViewAccountName);
         messageViewSender = storage.getInt(MESSAGE_VIEW_SENDER, messageViewSender);
         messageViewRecipients = storage.getInt(MESSAGE_VIEW_RECIPIENTS, messageViewRecipients);
         messageViewSubject = storage.getInt(MESSAGE_VIEW_SUBJECT, messageViewSubject);
@@ -126,6 +131,14 @@ public class FontSizes {
         this.messageListPreview = messageListPreview;
     }
 
+    public int getMessageViewAccountName() {
+        return messageViewAccountName;
+    }
+
+    public void setMessageViewAccountName(int messageViewAccountName) {
+        this.messageViewAccountName = messageViewAccountName;
+    }
+
     public int getMessageViewSender() {
         return messageViewSender;
     }
diff --git a/app/core/src/main/java/com/fsck/k9/preferences/GeneralSettingsDescriptions.java b/app/core/src/main/java/com/fsck/k9/preferences/GeneralSettingsDescriptions.java
index 0c947ad9d6..14819d4044 100644
--- a/app/core/src/main/java/com/fsck/k9/preferences/GeneralSettingsDescriptions.java
+++ b/app/core/src/main/java/com/fsck/k9/preferences/GeneralSettingsDescriptions.java
@@ -278,6 +278,9 @@ public class GeneralSettingsDescriptions {
         s.put("messageListDensity", Settings.versions(
             new V(86, new EnumSetting(UiDensity.class, UiDensity.Default))
         ));
+        s.put("fontSizeMessageViewAccountName", Settings.versions(
+            new V(87, new FontSizeSetting(FontSizes.FONT_DEFAULT))
+        ));
 
         SETTINGS = Collections.unmodifiableMap(s);
 
diff --git a/app/core/src/main/java/com/fsck/k9/preferences/Settings.java b/app/core/src/main/java/com/fsck/k9/preferences/Settings.java
index 2176427ce4..ea45b4d983 100644
--- a/app/core/src/main/java/com/fsck/k9/preferences/Settings.java
+++ b/app/core/src/main/java/com/fsck/k9/preferences/Settings.java
@@ -36,7 +36,7 @@ public class Settings {
      *
      * @see SettingsExporter
      */
-    public static final int VERSION = 86;
+    public static final int VERSION = 87;
 
     static Map<String, Object> validate(int version, Map<String, TreeMap<Integer, SettingsDescription>> settings,
             Map<String, String> importedSettings, boolean useDefaultValues) {
diff --git a/app/ui/legacy/src/main/java/com/fsck/k9/ui/settings/general/GeneralSettingsDataStore.kt b/app/ui/legacy/src/main/java/com/fsck/k9/ui/settings/general/GeneralSettingsDataStore.kt
index 33e67787a7..31be0d19d2 100644
--- a/app/ui/legacy/src/main/java/com/fsck/k9/ui/settings/general/GeneralSettingsDataStore.kt
+++ b/app/ui/legacy/src/main/java/com/fsck/k9/ui/settings/general/GeneralSettingsDataStore.kt
@@ -117,6 +117,7 @@ class GeneralSettingsDataStore(
             "message_list_sender_font" -> K9.fontSizes.messageListSender.toString()
             "message_list_date_font" -> K9.fontSizes.messageListDate.toString()
             "message_list_preview_font" -> K9.fontSizes.messageListPreview.toString()
+            "message_view_account_name_font" -> K9.fontSizes.messageViewAccountName.toString()
             "message_view_sender_font" -> K9.fontSizes.messageViewSender.toString()
             "message_view_recipients_font" -> K9.fontSizes.messageViewRecipients.toString()
             "message_view_subject_font" -> K9.fontSizes.messageViewSubject.toString()
@@ -152,6 +153,7 @@ class GeneralSettingsDataStore(
             "message_list_sender_font" -> K9.fontSizes.messageListSender = value.toInt()
             "message_list_date_font" -> K9.fontSizes.messageListDate = value.toInt()
             "message_list_preview_font" -> K9.fontSizes.messageListPreview = value.toInt()
+            "message_view_account_name_font" -> K9.fontSizes.messageViewAccountName = value.toInt()
             "message_view_sender_font" -> K9.fontSizes.messageViewSender = value.toInt()
             "message_view_recipients_font" -> K9.fontSizes.messageViewRecipients = value.toInt()
             "message_view_subject_font" -> K9.fontSizes.messageViewSubject = value.toInt()
diff --git a/app/ui/legacy/src/main/java/com/fsck/k9/view/MessageHeader.java b/app/ui/legacy/src/main/java/com/fsck/k9/view/MessageHeader.java
index fba965ee54..f4feabb688 100644
--- a/app/ui/legacy/src/main/java/com/fsck/k9/view/MessageHeader.java
+++ b/app/ui/legacy/src/main/java/com/fsck/k9/view/MessageHeader.java
@@ -50,7 +50,7 @@ public class MessageHeader extends LinearLayout implements OnClickListener, OnLo
     private final MessageHelper messageHelper = DI.get(MessageHelper.class);
     private final FontSizes fontSizes = K9.getFontSizes();
 
-    private Chip accountChip;
+    private Chip accountNameView;
     private TextView subjectView;
     private ImageView starView;
     private ImageView contactPictureView;
@@ -78,7 +78,7 @@ public class MessageHeader extends LinearLayout implements OnClickListener, OnLo
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        accountChip = findViewById(R.id.chip);
+        accountNameView = findViewById(R.id.account_name);
         subjectView = findViewById(R.id.subject);
         starView = findViewById(R.id.flagged);
         contactPictureView = findViewById(R.id.contact_picture);
@@ -87,6 +87,7 @@ public class MessageHeader extends LinearLayout implements OnClickListener, OnLo
         recipientNamesView = findViewById(R.id.recipients);
         dateView = findViewById(R.id.date);
 
+        fontSizes.setViewTextSize(accountNameView, fontSizes.getMessageViewAccountName());
         fontSizes.setViewTextSize(subjectView, fontSizes.getMessageViewSubject());
         fontSizes.setViewTextSize(dateView, fontSizes.getMessageViewDate());
         fontSizes.setViewTextSize(fromView, fontSizes.getMessageViewSender());
@@ -193,11 +194,11 @@ public class MessageHeader extends LinearLayout implements OnClickListener, OnLo
 
     public void populate(final Message message, final Account account, boolean showStar, boolean showAccountChip) {
         if (showAccountChip) {
-            accountChip.setVisibility(View.VISIBLE);
-            accountChip.setText(account.getDisplayName());
-            accountChip.setChipBackgroundColor(ColorStateList.valueOf(account.getChipColor()));
+            accountNameView.setVisibility(View.VISIBLE);
+            accountNameView.setText(account.getDisplayName());
+            accountNameView.setChipBackgroundColor(ColorStateList.valueOf(account.getChipColor()));
         } else {
-            accountChip.setVisibility(View.GONE);
+            accountNameView.setVisibility(View.GONE);
         }
 
         Address fromAddress = null;
diff --git a/app/ui/legacy/src/main/res/layout/message_view_header.xml b/app/ui/legacy/src/main/res/layout/message_view_header.xml
index 52f59d1a62..821f4aedab 100644
--- a/app/ui/legacy/src/main/res/layout/message_view_header.xml
+++ b/app/ui/legacy/src/main/res/layout/message_view_header.xml
@@ -18,7 +18,7 @@
             app:layout_constraintTop_toTopOf="parent" />
 
         <com.google.android.material.chip.Chip
-            android:id="@+id/chip"
+            android:id="@+id/account_name"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginStart="16dp"
@@ -37,13 +37,13 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             app:barrierDirection="bottom"
-            app:constraint_referenced_ids="chip,margin_top" />
+            app:constraint_referenced_ids="account_name,margin_top" />
 
         <com.fsck.k9.ui.helper.BottomBaselineTextView
             android:id="@+id/subject"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            android:layout_below="@id/chip"
+            android:layout_below="@id/account_name"
             android:layout_marginStart="16dp"
             android:layout_marginEnd="8dp"
             android:layout_marginBottom="16dp"
diff --git a/app/ui/legacy/src/main/res/values/strings.xml b/app/ui/legacy/src/main/res/values/strings.xml
index f7b727f4da..8ac577aaa1 100644
--- a/app/ui/legacy/src/main/res/values/strings.xml
+++ b/app/ui/legacy/src/main/res/values/strings.xml
@@ -880,6 +880,8 @@ Please submit bug reports, contribute new features and ask questions at
     <string name="font_size_message_list_preview">Preview</string>
 
     <string name="font_size_message_view">Messages</string>
+    <!-- Displayed in the font size settings screen to configure the font size of the account name in the message view. -->
+    <string name="font_size_message_view_account">Account name</string>
     <string name="font_size_message_view_sender">Sender</string>
     <string name="font_size_message_view_recipients">Recipients</string>
     <string name="font_size_message_view_subject">Subject</string>
diff --git a/app/ui/legacy/src/main/res/xml/general_settings.xml b/app/ui/legacy/src/main/res/xml/general_settings.xml
index f0b7a39945..a6cb64b219 100644
--- a/app/ui/legacy/src/main/res/xml/general_settings.xml
+++ b/app/ui/legacy/src/main/res/xml/general_settings.xml
@@ -104,6 +104,14 @@
                     android:title="@string/font_size_message_view"
                     android:key="message_view_fonts">
 
+                    <ListPreference
+                        android:key="message_view_account_name_font"
+                        android:title="@string/font_size_message_view_account"
+                        app:useSimpleSummaryProvider="true"
+                        android:entries="@array/font_entries"
+                        android:entryValues="@array/font_values"
+                        android:dialogTitle="@string/font_size_message_view_account" />
+
                     <ListPreference
                         android:key="message_view_subject_font"
                         android:title="@string/font_size_message_view_subject"