diff --git a/README.md b/README.md
index d5b7cc9..39dbcc1 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,7 @@ These go in `config.json`. See also `config.example.json`.
 |greetingMessage|None|Text content of the welcome message|
 |ignoreAccidentalThreads|false|If set to true, the bot attempts to ignore common "accidental" messages that would start a new thread, such as "ok", "thanks", etc.|
 |inboxServerPermission|None|Permission required to use bot commands on the inbox server|
+|joinedAtDeniedMessage|None|"You haven't been a member of the server for enough time to contact modmail"|See `requiredJoinedAt` below|
 |mentionRole|"here"|Role that is mentioned when new threads are created or the bot is mentioned. Accepted values are "here", "everyone", or a role id as a string. Set to null to disable these pings entirely.|
 |mentionUserInThreadHeader|false|If set to true, mentions the thread's user in the thread header|
 |newThreadCategoryId|None|ID of the category where new modmail thread channels should be placed|
@@ -89,6 +90,7 @@ These go in `config.json`. See also `config.example.json`.
 |prefix|"!"|Prefix for bot commands|
 |relaySmallAttachmentsAsAttachments|false|Whether to relay small attachments from users as native attachments rather than links in modmail threads|
 |requiredAccountAge|None|Required account age for contacting modmail (in hours). If the account is not old enough, a new thread will not be created and the bot will reply with `accountAgeDeniedMessage` (if set) instead.|
+|requiredJoinedAt|None|Required amount of time (in hours) the user must be a member of the server before being able to contact modmail. If the user hasn't been a member of the server for the specified time, a new thread will not be created and the bot will reply with `joinedAtDeniedMessage` (if set) instead.|
 |responseMessage|"Thank you for your message! Our mod team will reply to you here as soon as possible."|The bot's response to DMs that start a new thread|
 |smallAttachmentLimit|2097152|Size limit of `relaySmallAttachmentsAsAttachments`, in bytes (default is 2MB)|
 |snippetPrefix|"!!"|Prefix to use snippets|
diff --git a/src/config.js b/src/config.js
index 411e527..1f9f17a 100644
--- a/src/config.js
+++ b/src/config.js
@@ -78,6 +78,9 @@ const defaultConfig = {
   "requiredAccountAge": null, // In hours
   "accountAgeDeniedMessage": "Your Discord account is not old enough to contact modmail.",
 
+  "requiredJoinedAt": null, // In hours too
+  "joinedAtDeniedMessage": "You haven't been a member of the server for enough time to contact modmail",
+
   "relaySmallAttachmentsAsAttachments": false,
   "smallAttachmentLimit": 1024 * 1024 * 2,
   "attachmentStorage": "local",
diff --git a/src/data/threads.js b/src/data/threads.js
index 2716c84..19b6622 100644
--- a/src/data/threads.js
+++ b/src/data/threads.js
@@ -51,12 +51,24 @@ function getHeaderGuildInfo(member) {
  * @returns {Promise<Thread>}
  * @throws {Error}
  */
-async function createNewThreadForUser(user, quiet = false) {
+async function createNewThreadForUser(user, member, quiet = false) {
   const existingThread = await findOpenThreadByUserId(user.id);
   if (existingThread) {
     throw new Error('Attempted to create a new thread for a user with an existing open thread!');
   }
 
+  // Check the config for a requirement of a minimum time the user must be a member of the guild to contact modmail,
+  // if the user hasn't been a member of the guild for the specified time, return an optional message without making a new thread
+  if (config.requiredJoinedAt && member) {
+    if (member.joinedAt > moment() - config.requiredJoinedAt) {
+      if (config.joinedAtDeniedMessage) {
+        const privateChannel = await user.getDMChannel();
+        await privateChannel.createMessage(config.joinedAtDeniedMessage);
+      }
+      return;
+    }
+  }
+
   // Check the config for a requirement of account age to contact modmail,
   // if the account is too young, return an optional message without making a new thread
   if (config.requiredAccountAge) {
diff --git a/src/main.js b/src/main.js
index 65667cd..43fa9fa 100644
--- a/src/main.js
+++ b/src/main.js
@@ -74,12 +74,25 @@ bot.on('messageCreate', async msg => {
   messageQueue.add(async () => {
     let thread = await threads.findOpenThreadByUserId(msg.author.id);
 
+    // Due the way discord works, private channels don't have a member property as they are a guild only property,
+    // if more than one main guild have been set, we just ignore the requiredJoinedAt config option
+    let member;
+    const mainGuilds = utils.getMainGuilds();
+    if (mainGuilds.length === 1) {
+      member = bot.guilds.get(mainGuilds[0]).members.get(msg.author.id);
+      if (! member) {
+        member = false;
+      }
+    } else {
+      member = false;
+    }
+
     // New thread
     if (! thread) {
       // Ignore messages that shouldn't usually open new threads, such as "ok", "thanks", etc.
       if (config.ignoreAccidentalThreads && msg.content && ACCIDENTAL_THREAD_MESSAGES.includes(msg.content.trim().toLowerCase())) return;
 
-      thread = await threads.createNewThreadForUser(msg.author);
+      thread = await threads.createNewThreadForUser(msg.author, member);
     }
 
     if (thread) await thread.receiveUserReply(msg);
diff --git a/src/modules/newthread.js b/src/modules/newthread.js
index ca3431d..ac17951 100644
--- a/src/modules/newthread.js
+++ b/src/modules/newthread.js
@@ -17,13 +17,24 @@ module.exports = bot => {
       return;
     }
 
+    let member;
+    const mainGuilds = utils.getMainGuilds();
+    if (mainGuilds.length === 1) {
+      member = bot.guilds.get(mainGuilds[0]).members.get(msg.author.id);
+      if (! member) {
+        member = false;
+      }
+    } else {
+      member = false;
+    }
+
     const existingThread = await threads.findOpenThreadByUserId(user.id);
     if (existingThread) {
       utils.postSystemMessageWithFallback(msg.channel, thread, `Cannot create a new thread; there is another open thread with this user: <#${existingThread.channel_id}>`);
       return;
     }
 
-    const createdThread = await threads.createNewThreadForUser(user, true);
+    const createdThread = await threads.createNewThreadForUser(user, member, true);
     createdThread.postSystemMessage(`Thread was opened by ${msg.author.username}#${msg.author.discriminator}`);
 
     if (thread) {
diff --git a/src/utils.js b/src/utils.js
index fddb719..3b93ce8 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -78,7 +78,7 @@ function postError(str) {
  * @returns {boolean}
  */
 function isStaff(member) {
-  if (!member) return false;
+  if (! member) return false;
   if (config.inboxServerPermission.length === 0) return true;
 
   return config.inboxServerPermission.some(perm => {