diff --git a/config.example.ini b/config.example.ini
index 8b403a9..ff3c145 100644
--- a/config.example.ini
+++ b/config.example.ini
@@ -1,8 +1,8 @@
 # Required settings
 # -----------------
 token = REPLACE_WITH_TOKEN
-mainGuildId = REPLACE_WITH_MAIN_SERVER_ID
-mailGuildId = REPLACE_WITH_INBOX_SERVER_ID
+mainServerId = REPLACE_WITH_MAIN_SERVER_ID
+inboxServerId = REPLACE_WITH_INBOX_SERVER_ID
 logChannelId = REPLACE_WITH_LOG_CHANNEL_ID
 
 # Add new options below this line:
diff --git a/docs/configuration.md b/docs/configuration.md
index fb50674..fe06522 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -22,7 +22,7 @@ vice versa.
 
 ## Adding new options
 To add a new option to your `config.ini`, open the file in a text editor such as notepad.
-Each option is put on a new line, and follows the format `option = value`. For example, `mainGuildId = 1234`.
+Each option is put on a new line, and follows the format `option = value`. For example, `mainServerId = 1234`.
 
 **You need to restart the bot for configuration changes to take effect!**
 
@@ -65,12 +65,12 @@ greetingMessage[] = Fourth line! With an empty line in the middle.
 #### token
 The bot user's token from [Discord Developer Portal](https://discordapp.com/developers/).
 
-#### mainGuildId
+#### mainServerId
 **Accepts multiple values** Your server's ID.
 
-#### mailGuildId
-For a two-server setup, the inbox server's ID.  
-For a single-server setup, same as [mainGuildId](#mainguildid).
+#### inboxServerId
+For a single-server setup, same as [mainServerId](#mainServerId).  
+For a two-server setup, the inbox server's ID.
 
 #### logChannelId
 ID of a channel on the inbox server where logs are posted after a modmail thread is closed
@@ -190,6 +190,12 @@ See ["Permissions" on this page](https://abal.moe/Eris/docs/reference) for suppo
 **Default:** `You haven't been a member of the server for long enough to contact modmail.`  
 If `requiredTimeOnServer` is set, users that are too new will be sent this message if they try to message modmail.
 
+#### mainGuildId
+Alias for [mainServerId](#mainServerId)
+
+#### mailGuildId
+Alias for [inboxServerId](#inboxServerId)
+
 #### mentionRole
 **Default:** `here`  
 **Accepts multiple values.** Role that is mentioned when new threads are created or the bot is mentioned.
@@ -359,7 +365,7 @@ However, there are some differences between `config.ini` and `config.json`.
 *See [the example on the Wikipedia page for JSON](https://en.wikipedia.org/wiki/JSON#Example)
 for a general overview of the JSON format.*
 
-* In `config.json`, all text values and IDs need to be wrapped in quotes, e.g. `"mainGuildId": "94882524378968064"`
+* In `config.json`, all text values and IDs need to be wrapped in quotes, e.g. `"mainServerId": "94882524378968064"`
 * In `config.json`, all numbers (other than IDs) are written without quotes, e.g. `"port": 3000`
 
 ### Toggle options
@@ -400,7 +406,7 @@ being replaced by two underscores and add `MM_` as a prefix. If adding multiple
 values with two pipe characters: `||`.
 
 Examples:
-* `mainGuildId` -> `MM_MAIN_GUILD_ID`
+* `mainServerId` -> `MM_MAIN_SERVER_ID`
 * `commandAliases.mv` -> `MM_COMMAND_ALIASES__MV`
 * From:  
   ```ini
diff --git a/docs/setup.md b/docs/setup.md
index fcb6e0d..4d3a447 100644
--- a/docs/setup.md
+++ b/docs/setup.md
@@ -25,7 +25,7 @@ In this setup, modmail threads are opened on the main server in a special catego
 This is the recommended setup for small and medium sized servers.
 
 1. **Go through the [prerequisites](#prerequisites) above first!**
-2. Open `config.ini` in a text editor and fill in the required values. `mainGuildId` and `mailGuildId` should both be set to your server's id.
+2. Open `config.ini` in a text editor and fill in the required values. `mainServerId` and `inboxServerId` should both be set to your server's id.
 3. Invite the bot to the server
 4. On a new line at the end of `config.ini`, add `categoryAutomation.newThread = CATEGORY_ID_HERE`
     * Replace `CATEGORY_ID_HERE` with the ID of the category where new modmail threads should go
@@ -44,8 +44,8 @@ You might also want this setup for privacy concerns*.
 1. **Go through the [prerequisites](#prerequisites) above first!**
 2. Create an inbox server on Discord
 3. Open `config.ini` in a text editor and fill in the required values
-    * Set `mainGuildId` to the ID of the *main* server where users will message the bot from
-    * Set `mailGuildId` to the ID of the *inbox* server created in step 2
+    * Set `mainServerId` to the ID of the *main* server where users will message the bot from
+    * Set `inboxServerId` to the ID of the *inbox* server created in step 2
 4. Invite the bot to both the main server and the newly-created inbox server
 5. Open `config.ini` in a text editor and fill in the values
 6. Make sure the bot has the `Manage Channels`, `Manage Messages`, and `Attach Files` permissions on the **inbox** server
diff --git a/src/cfg.js b/src/cfg.js
index 35c2371..2d91e8c 100644
--- a/src/cfg.js
+++ b/src/cfg.js
@@ -102,6 +102,15 @@ for (const [key, value] of Object.entries(config)) {
   delete config[key];
 }
 
+// mainGuildId => mainServerId
+// mailGuildId => inboxServerId
+if (config.mainGuildId && ! config.mainServerId) {
+  config.mainServerId = config.mainGuildId;
+}
+if (config.mailGuildId && ! config.inboxServerId) {
+  config.inboxServerId = config.mailGuildId;
+}
+
 if (! config.dbType) {
   config.dbType = "sqlite";
 }
@@ -117,7 +126,7 @@ if (! config.sqliteOptions) {
 // already have something set up in guildGreetings. This retains backwards compatibility while allowing you to override
 // greetings for specific servers in guildGreetings.
 if (config.greetingMessage || config.greetingAttachment) {
-  for (const guildId of config.mainGuildId) {
+  for (const guildId of config.mainServerId) {
     if (config.guildGreetings[guildId]) continue;
     config.guildGreetings[guildId] = {
       message: config.greetingMessage,
diff --git a/src/data/cfg.jsdoc.js b/src/data/cfg.jsdoc.js
index 8d614c7..45dc6ff 100644
--- a/src/data/cfg.jsdoc.js
+++ b/src/data/cfg.jsdoc.js
@@ -1,9 +1,11 @@
 /**
  * @typedef {object} ModmailConfig
  * @property {string} [token]
+ * @property {array} [mainServerId]
+ * @property {string} [inboxServerId]
+ * @property {string} [logChannelId]
  * @property {array} [mainGuildId]
  * @property {string} [mailGuildId]
- * @property {string} [logChannelId]
  * @property {string} [prefix="!"]
  * @property {string} [snippetPrefix="!!"]
  * @property {string} [snippetPrefixAnon="!!!"]
diff --git a/src/data/cfg.schema.json b/src/data/cfg.schema.json
index 519802d..64550e6 100644
--- a/src/data/cfg.schema.json
+++ b/src/data/cfg.schema.json
@@ -46,16 +46,25 @@
     "token": {
       "type": "string"
     },
-    "mainGuildId": {
+    "mainServerId": {
       "$ref": "#/definitions/stringArray"
     },
-    "mailGuildId": {
+    "inboxServerId": {
       "type": "string"
     },
     "logChannelId": {
       "type": "string"
     },
 
+    "mainGuildId": {
+      "$comment": "Alias for mainServerId",
+      "$ref": "#/definitions/stringArray"
+    },
+    "mailGuildId": {
+      "$comment": "Alias for inboxServerId",
+      "type": "string"
+    },
+
     "prefix": {
       "type": "string",
       "default": "!"
@@ -323,7 +332,7 @@
   "allOf": [
     {
       "$comment": "Base required values",
-      "required": ["token", "mainGuildId", "mailGuildId", "logChannelId", "dbType"]
+      "required": ["token", "mainServerId", "inboxServerId", "logChannelId", "dbType"]
     },
     {
       "$comment": "Make attachmentStorageChannelId required if attachmentStorage is set to 'discord'",
diff --git a/src/main.js b/src/main.js
index 7d1a9eb..8af38be 100644
--- a/src/main.js
+++ b/src/main.js
@@ -38,8 +38,8 @@ module.exports = {
     bot.once("ready", async () => {
       console.log("Connected! Waiting for guilds to become available...");
       await Promise.all([
-        ...config.mainGuildId.map(id => waitForGuild(id)),
-        waitForGuild(config.mailGuildId)
+        ...config.mainServerId.map(id => waitForGuild(id)),
+        waitForGuild(config.inboxServerId),
       ]);
 
       console.log("Initializing...");
diff --git a/src/utils.js b/src/utils.js
index 8c993b2..2a8bddb 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -17,7 +17,7 @@ let logChannel = null;
  * @returns {Eris~Guild}
  */
 function getInboxGuild() {
-  if (! inboxGuild) inboxGuild = bot.guilds.find(g => g.id === config.mailGuildId);
+  if (! inboxGuild) inboxGuild = bot.guilds.find(g => g.id === config.inboxServerId);
   if (! inboxGuild) throw new BotError("The bot is not on the modmail (inbox) server!");
   return inboxGuild;
 }
@@ -27,11 +27,11 @@ function getInboxGuild() {
  */
 function getMainGuilds() {
   if (mainGuilds.length === 0) {
-    mainGuilds = bot.guilds.filter(g => config.mainGuildId.includes(g.id));
+    mainGuilds = bot.guilds.filter(g => config.mainServerId.includes(g.id));
   }
 
-  if (mainGuilds.length !== config.mainGuildId.length) {
-    if (config.mainGuildId.length === 1) {
+  if (mainGuilds.length !== config.mainServerId.length) {
+    if (config.mainServerId.length === 1) {
       console.warn("[WARN] The bot hasn't joined the main guild!");
     } else {
       console.warn("[WARN] The bot hasn't joined one or more main guilds!");