diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7d3eafac75..6ebbdbd697 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+
+# v2.19.0
+
+### What's new?
+
+- New config variable `guild_age`, similar to `account_age`, `guild_age` sets a limit as to how long a user has to wait after they joined the server to message Modmail.
+- `guild_age` can be set the same way as `account_age`.
+
 # v2.18.5
 
 Fix help command bug when using external plugins.
@@ -68,7 +76,6 @@ When updating to this version, all prior permission settings with guild-based pe
 
 - The help message no longer conceals inaccessible commands due to check failures.
 
-
 # v2.17.2
 
 ### Changed
diff --git a/bot.py b/bot.py
index 70f4106165..7643ad8771 100644
--- a/bot.py
+++ b/bot.py
@@ -22,7 +22,7 @@
 SOFTWARE.
 """
 
-__version__ = '2.18.5'
+__version__ = '2.19.0'
 
 import asyncio
 import logging
@@ -467,8 +467,10 @@ async def retrieve_emoji(self):
     async def process_modmail(self, message):
         """Processes messages sent to the bot."""
         sent_emoji, blocked_emoji = await self.retrieve_emoji()
+        now = datetime.utcnow()
 
         account_age = self.config.get('account_age')
+        guild_age = self.config.get('guild_age')
         if account_age is None:
             account_age = isodate.duration.Duration()
         else:
@@ -483,19 +485,41 @@ async def process_modmail(self, message):
                 await self.config.update()
                 account_age = isodate.duration.Duration()
 
+        if guild_age is None:
+            guild_age = isodate.duration.Duration()
+        else:
+            try:
+                guild_age = isodate.parse_duration(guild_age)
+            except isodate.ISO8601Error:
+                logger.warning('The guild join age limit needs to be a '
+                               'ISO-8601 duration formatted duration string '
+                               f'greater than 0 days, not "%s".', str(guild_age))
+                del self.config.cache['guild_age']
+                await self.config.update()
+                guild_age = isodate.duration.Duration()
+
         reason = self.blocked_users.get(str(message.author.id))
         if reason is None:
             reason = ''
+
         try:
             min_account_age = message.author.created_at + account_age
         except ValueError as e:
             logger.warning(e.args[0])
             del self.config.cache['account_age']
             await self.config.update()
-            min_account_age = message.author.created_at
+            min_account_age = now
 
-        if min_account_age > datetime.utcnow():
-            # user account has not reached the required time
+        try:
+            min_guild_age = self.guild.get_member(message.author.id).joined_at + guild_age
+        except ValueError as e:
+            logger.warning(e.args[0])
+            del self.config.cache['guild_age']
+            await self.config.update()
+            min_guild_age = now
+
+        if min_account_age > now:
+            # User account has not reached the required time
             reaction = blocked_emoji
             changed = False
             delta = human_timedelta(min_account_age)
@@ -514,6 +538,26 @@ async def process_modmail(self, message):
                     color=discord.Color.red()
                 ))
 
+        elif min_guild_age > now:
+            # User has not stayed in the guild for long enough
+            reaction = blocked_emoji
+            changed = False
+            delta = human_timedelta(min_guild_age)
+
+            if str(message.author.id) not in self.blocked_users:
+                new_reason = f'System Message: Recently Joined. Required to wait for {delta}.'
+                self.config.blocked[str(message.author.id)] = new_reason
+                await self.config.update()
+                changed = True
+
+            if reason.startswith('System Message: Recently Joined.') or changed:
+                await message.channel.send(embed=discord.Embed(
+                    title='Message not sent!',
+                    description=f'Your must wait for {delta} '
+                    f'before you can contact {self.user.mention}.',
+                    color=discord.Color.red()
+                ))
+
         elif str(message.author.id) in self.blocked_users:
             reaction = blocked_emoji
             if reason.startswith('System Message: New Account.'):
@@ -524,8 +568,7 @@ async def process_modmail(self, message):
             else:
                 end_time = re.search(r'%(.+?)%$', reason)
                 if end_time is not None:
-                    after = (datetime.fromisoformat(end_time.group(1)) -
-                             datetime.utcnow()).total_seconds()
+                    after = (datetime.fromisoformat(end_time.group(1)) - now).total_seconds()
                     if after <= 0:
                         # No longer blocked
                         reaction = sent_emoji
diff --git a/core/config.py b/core/config.py
index 8e1224a76c..00b017c93d 100644
--- a/core/config.py
+++ b/core/config.py
@@ -19,7 +19,8 @@ class ConfigManager(ConfigManagerABC):
 
         # bot settings
         'main_category_id', 'disable_autoupdates', 'prefix', 'mention',
-        'main_color', 'user_typing', 'mod_typing', 'account_age', 'reply_without_command',
+        'main_color', 'user_typing', 'mod_typing', 'account_age', 'guild_age',
+        'reply_without_command',
 
         # logging
         'log_channel_id',
@@ -71,7 +72,7 @@ class ConfigManager(ConfigManagerABC):
     }
 
     time_deltas = {
-        'account_age'
+        'account_age', 'guild_age'
     }
 
     valid_keys = allowed_to_change_in_command | internal_keys | protected_keys