diff --git a/packages/backend/src/core/UserListService.ts b/packages/backend/src/core/UserListService.ts
index f0a8768c8f..61435500b7 100644
--- a/packages/backend/src/core/UserListService.ts
+++ b/packages/backend/src/core/UserListService.ts
@@ -91,7 +91,7 @@ export class UserListService implements OnApplicationShutdown, OnModuleInit {
 	}
 
 	@bindThis
-	public async addMember(target: MiUser, list: MiUserList, me: MiUser) {
+	public async addMember(target: MiUser, list: MiUserList, me: MiUser, options: { withReplies?: boolean } = {}) {
 		const currentCount = await this.userListMembershipsRepository.countBy({
 			userListId: list.id,
 		});
@@ -104,6 +104,7 @@ export class UserListService implements OnApplicationShutdown, OnModuleInit {
 			userId: target.id,
 			userListId: list.id,
 			userListUserId: list.userId,
+			withReplies: options.withReplies ?? false,
 		} as MiUserListMembership);
 
 		this.globalEventService.publishInternalEvent('userListMemberAdded', { userListId: list.id, memberId: target.id });
diff --git a/packages/backend/src/queue/processors/ExportUserListsProcessorService.ts b/packages/backend/src/queue/processors/ExportUserListsProcessorService.ts
index c483d79854..733e75f65f 100644
--- a/packages/backend/src/queue/processors/ExportUserListsProcessorService.ts
+++ b/packages/backend/src/queue/processors/ExportUserListsProcessorService.ts
@@ -67,10 +67,12 @@ export class ExportUserListsProcessorService {
 				const users = await this.usersRepository.findBy({
 					id: In(memberships.map(j => j.userId)),
 				});
+				const usersWithReplies = new Set(memberships.filter(m => m.withReplies).map(m => m.userId));
 
 				for (const u of users) {
 					const acct = this.utilityService.getFullApAccount(u.username, u.host);
-					const content = `${list.name},${acct}`;
+					// 3rd column and later will be key=value pairs
+					const content = `${list.name},${acct},withReplies=${usersWithReplies.has(u.id)}`;
 					await new Promise<void>((res, rej) => {
 						stream.write(content + '\n', err => {
 							if (err) {
diff --git a/packages/backend/src/queue/processors/ImportUserListsProcessorService.ts b/packages/backend/src/queue/processors/ImportUserListsProcessorService.ts
index db9255b35d..bf061a1f78 100644
--- a/packages/backend/src/queue/processors/ImportUserListsProcessorService.ts
+++ b/packages/backend/src/queue/processors/ImportUserListsProcessorService.ts
@@ -70,8 +70,19 @@ export class ImportUserListsProcessorService {
 			linenum++;
 
 			try {
-				const listName = line.split(',')[0].trim();
-				const { username, host } = Acct.parse(line.split(',')[1].trim());
+				const parts = line.split(',');
+				const listName = parts[0].trim();
+				const { username, host } = Acct.parse(parts[1].trim());
+				let withReplies = false;
+
+				for (const keyValue of parts.slice(2)) {
+					const [key, value] = keyValue.split('=');
+					switch (key) {
+						case 'withReplies':
+							withReplies = value === 'true';
+							break;
+					}
+				}
 
 				let list = await this.userListsRepository.findOneBy({
 					userId: user.id,
@@ -100,7 +111,9 @@ export class ImportUserListsProcessorService {
 
 				if (await this.userListMembershipsRepository.findOneBy({ userListId: list!.id, userId: target.id }) != null) continue;
 
-				this.userListService.addMember(target, list!, user);
+				await this.userListService.addMember(target, list, user, {
+					withReplies: withReplies,
+				});
 			} catch (e) {
 				this.logger.warn(`Error in line:${linenum} ${e}`);
 			}