diff --git a/zerver/lib/markdown/__init__.py b/zerver/lib/markdown/__init__.py
index 0f4270eff8..98910a6102 100644
--- a/zerver/lib/markdown/__init__.py
+++ b/zerver/lib/markdown/__init__.py
@@ -54,7 +54,7 @@ from zerver.lib.emoji import EMOTICON_RE, codepoint_to_name, name_to_codepoint,
 from zerver.lib.exceptions import MarkdownRenderingException
 from zerver.lib.markdown import fenced_code
 from zerver.lib.markdown.fenced_code import FENCE_RE
-from zerver.lib.mention import MentionData, get_stream_name_map
+from zerver.lib.mention import FullNameInfo, MentionData, get_stream_name_map
 from zerver.lib.outgoing_http import OutgoingSession
 from zerver.lib.subdomains import is_static_or_current_realm_url
 from zerver.lib.tex import render_tex
@@ -1865,7 +1865,7 @@ class UserMentionPattern(CompiledInlineProcessor):
                 # This enforces our decision that
                 # @**user_1_name|id_for_user_2** should be invalid syntax.
                 if full_name:
-                    if user and user["full_name"] != full_name:
+                    if user and user.full_name != full_name:
                         return None, None, None
             else:
                 # For @**name** syntax.
@@ -1875,11 +1875,13 @@ class UserMentionPattern(CompiledInlineProcessor):
                 if not silent:
                     self.md.zulip_rendering_result.mentions_wildcard = True
                 user_id = "*"
-            elif user:
+            elif user is not None:
+                assert isinstance(user, FullNameInfo)
+
                 if not silent:
-                    self.md.zulip_rendering_result.mentions_user_ids.add(user["id"])
-                name = user["full_name"]
-                user_id = str(user["id"])
+                    self.md.zulip_rendering_result.mentions_user_ids.add(user.id)
+                name = user.full_name
+                user_id = str(user.id)
             else:
                 # Don't highlight @mentions that don't refer to a valid user
                 return None, None, None
diff --git a/zerver/lib/mention.py b/zerver/lib/mention.py
index c8bbbb7313..dfea1d4b9b 100644
--- a/zerver/lib/mention.py
+++ b/zerver/lib/mention.py
@@ -1,9 +1,9 @@
 import functools
 import re
+from dataclasses import dataclass
 from typing import Dict, List, Match, Optional, Set, Tuple
 
 from django.db.models import Q
-from typing_extensions import TypedDict
 
 from zerver.models import Realm, UserGroup, UserProfile, get_active_streams
 
@@ -15,9 +15,9 @@ USER_GROUP_MENTIONS_RE = re.compile(r"(?<![^\s\'\"\(,:<])@(?P<silent>_?)(\*(?P<m
 wildcards = ["all", "everyone", "stream"]
 
 
-class FullNameInfo(TypedDict):
+@dataclass
+class FullNameInfo:
     id: int
-    email: str
     full_name: str
 
 
@@ -80,21 +80,20 @@ def get_possible_mentions_info(realm_id: int, mention_texts: Set[str]) -> List[F
         .filter(
             functools.reduce(lambda a, b: a | b, q_list),
         )
-        .values(
+        .only(
             "id",
             "full_name",
-            "email",
         )
     )
-    return list(rows)
+    return [FullNameInfo(id=row.id, full_name=row.full_name) for row in rows]
 
 
 class MentionData:
     def __init__(self, realm_id: int, content: str) -> None:
         mention_texts, has_wildcards = possible_mentions(content)
         possible_mentions_info = get_possible_mentions_info(realm_id, mention_texts)
-        self.full_name_info = {row["full_name"].lower(): row for row in possible_mentions_info}
-        self.user_id_info = {row["id"]: row for row in possible_mentions_info}
+        self.full_name_info = {row.full_name.lower(): row for row in possible_mentions_info}
+        self.user_id_info = {row.id: row for row in possible_mentions_info}
         self.init_user_group_data(realm_id=realm_id, content=content)
         self.has_wildcards = has_wildcards
 
diff --git a/zerver/tests/test_markdown.py b/zerver/tests/test_markdown.py
index 4a5224184f..50b3c4d75e 100644
--- a/zerver/tests/test_markdown.py
+++ b/zerver/tests/test_markdown.py
@@ -41,6 +41,7 @@ from zerver.lib.markdown import (
 from zerver.lib.markdown.fenced_code import FencedBlockPreprocessor
 from zerver.lib.mdiff import diff_strings
 from zerver.lib.mention import (
+    FullNameInfo,
     MentionData,
     get_possible_mentions_info,
     possible_mentions,
@@ -234,22 +235,20 @@ class MarkdownMiscTest(ZulipTestCase):
         lst = get_possible_mentions_info(
             realm.id, {"Fred Flintstone", "Cordelia, LEAR's daughter", "Not A User"}
         )
-        set_of_names = set(map(lambda x: x["full_name"].lower(), lst))
+        set_of_names = set(map(lambda x: x.full_name.lower(), lst))
         self.assertEqual(set_of_names, {"fred flintstone", "cordelia, lear's daughter"})
 
-        by_id = {row["id"]: row for row in lst}
+        by_id = {row.id: row for row in lst}
         self.assertEqual(
             by_id.get(fred2.id),
-            dict(
-                email=fred2.email,
+            FullNameInfo(
                 full_name="Fred Flintstone",
                 id=fred2.id,
             ),
         )
         self.assertEqual(
             by_id.get(fred4.id),
-            dict(
-                email=fred4.email,
+            FullNameInfo(
                 full_name="Fred Flintstone",
                 id=fred4.id,
             ),
@@ -264,8 +263,7 @@ class MarkdownMiscTest(ZulipTestCase):
         self.assertEqual(mention_data.get_user_ids(), {hamlet.id, cordelia.id})
         self.assertEqual(
             mention_data.get_user_by_id(hamlet.id),
-            dict(
-                email=hamlet.email,
+            FullNameInfo(
                 full_name=hamlet.full_name,
                 id=hamlet.id,
             ),
@@ -273,7 +271,7 @@ class MarkdownMiscTest(ZulipTestCase):
 
         user = mention_data.get_user_by_name("king hamLET")
         assert user is not None
-        self.assertEqual(user["email"], hamlet.email)
+        self.assertEqual(user.full_name, hamlet.full_name)
 
         self.assertFalse(mention_data.message_has_wildcards())
         content = "@**King Hamlet** @**Cordelia, lear's daughter** @**all**"