diff --git a/packages/local-sync/src/local-sync-worker/sync-worker.es6 b/packages/local-sync/src/local-sync-worker/sync-worker.es6
index 14a0b5036..c17b7c413 100644
--- a/packages/local-sync/src/local-sync-worker/sync-worker.es6
+++ b/packages/local-sync/src/local-sync-worker/sync-worker.es6
@@ -1,7 +1,8 @@
 const _ = require('underscore')
 const {
-  IMAPConnection,
   IMAPErrors,
+  IMAPConnection,
+  SendmailClient,
 } = require('isomorphic-core');
 const {
   Actions,
@@ -32,11 +33,7 @@ class SyncWorker {
     this._interruptible = new Interruptible()
     this._localDeltas = new LocalSyncDeltaEmitter(db, account.id)
     this._logger = global.Logger.forAccount(account)
-    this._syncbackTaskRunner = new SyncbackTaskRunner({
-      db,
-      account,
-      logger: this._logger,
-    })
+    this._smtp = new SendmailClient(this._account, this._logger)
 
     this._startTime = Date.now()
     this._lastSyncTime = null
@@ -420,8 +417,16 @@ class SyncWorker {
     yield this._ensureConnection();
     yield this._ensureMailListenerConnection();
 
+    const syncbackTaskRunner = new SyncbackTaskRunner({
+      db: this._db,
+      imap: this._conn,
+      smtp: this._smtp,
+      logger: this._logger,
+      account: this._account,
+    })
+
     // Step 1: Mark all "INPROGRESS" tasks as failed.
-    await this._syncbackTaskRunner.markInProgressTasksAsFailed()
+    await syncbackTaskRunner.markInProgressTasksAsFailed()
     yield // Yield to allow interruption
 
     // Step 2: Run any available syncback tasks
@@ -431,13 +436,10 @@ class SyncWorker {
     // (e.g. marking as unread or starred). We need to listen to that event for
     // when updates are performed from another mail client, but ignore
     // them when they are caused from within N1 to prevent unecessary interrupts
-    const tasks = yield this._syncbackTaskRunner.getNewSyncbackTasks()
+    const tasks = yield syncbackTaskRunner.getNewSyncbackTasks()
     this._shouldIgnoreInboxFlagUpdates = true
     for (const task of tasks) {
-      const {shouldRetry} = await this._syncbackTaskRunner.runSyncbackTask({
-        task,
-        runTask: (t) => this._conn.runOperation(t),
-      })
+      const {shouldRetry} = await syncbackTaskRunner.runSyncbackTask(task)
       if (shouldRetry) {
         this.syncNow({reason: 'Retrying syncback task', interrupt: true});
       }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-task-runner.es6 b/packages/local-sync/src/local-sync-worker/syncback-task-runner.es6
index ffcfb8c27..4a156476a 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-task-runner.es6
+++ b/packages/local-sync/src/local-sync-worker/syncback-task-runner.es6
@@ -1,6 +1,7 @@
-const {Actions} = require('nylas-exports')
-const {IMAPErrors} = require('isomorphic-core')
-const SyncbackTaskFactory = require('./syncback-task-factory');
+import {Actions} from 'nylas-exports'
+import {IMAPErrors} from 'isomorphic-core'
+import SyncbackTask from './syncback-tasks/syncback-task'
+import SyncbackTaskFactory from './syncback-task-factory';
 
 const MAX_TASK_RETRIES = 2
 
@@ -12,7 +13,7 @@ const SendTaskTypes = [
 
 class SyncbackTaskRunner {
 
-  constructor({db, account, logger} = {}) {
+  constructor({db, account, logger, imap, smtp} = {}) {
     if (!db) {
       throw new Error('SyncbackTaskRunner: need to pass db')
     }
@@ -22,9 +23,17 @@ class SyncbackTaskRunner {
     if (!logger) {
       throw new Error('SyncbackTaskRunner: need to pass logger')
     }
+    if (!imap) {
+      throw new Error('SyncbackTaskRunner: need to pass imap')
+    }
+    if (!smtp) {
+      throw new Error('SyncbackTaskRunner: need to pass smtp')
+    }
     this._db = db
     this._account = account
     this._logger = logger
+    this._imap = imap
+    this._smtp = smtp
   }
 
   /**
@@ -125,8 +134,10 @@ class SyncbackTaskRunner {
     }
   }
 
-  // TODO JUAN! remove this uglyness that is runTask
-  async runSyncbackTask({task, runTask} = {}) {
+  async runSyncbackTask(task) {
+    if (!task || !(task instanceof SyncbackTask)) {
+      throw new Error('runSyncbackTask: must pass a SyncbackTask')
+    }
     const before = new Date();
     const syncbackRequest = task.syncbackRequestObject();
     let shouldRetry = false
@@ -138,11 +149,18 @@ class SyncbackTaskRunner {
       syncbackRequest.status = "INPROGRESS";
       await syncbackRequest.save();
 
-      // TODO `runTask` is a hack to allow tasks to be executed outside the
-      // context of an imap connection, specifically to allow running send tasks
-      // outside of the sync loop. This should be solved in a better way or
-      // probably refactored when we implement the sync scheduler
-      const responseJSON = await runTask(task)
+      const resource = task.resource()
+      let responseJSON;
+      switch (resource) {
+        case 'imap':
+          responseJSON = await this._imap.runOperation(task)
+          break;
+        case 'smtp':
+          responseJSON = await task.run(this._db, this._smtp)
+          break;
+        default:
+          throw new Error(`runSyncbackTask: unknown resource. Must be one of ['imap', 'smtp']`)
+      }
       syncbackRequest.status = "SUCCEEDED";
       syncbackRequest.responseJSON = responseJSON || {};
 
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/create-category.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/create-category.imap.js
index afe75ef39..2bf013560 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/create-category.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/create-category.imap.js
@@ -1,6 +1,6 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 
-class CreateCategoryIMAP extends SyncbackTask {
+class CreateCategoryIMAP extends SyncbackIMAPTask {
   description() {
     return `CreateCategory`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-folder.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-folder.imap.js
index b29459709..12ba4b8f8 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-folder.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-folder.imap.js
@@ -1,6 +1,6 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 
-class DeleteFolderIMAP extends SyncbackTask {
+class DeleteFolderIMAP extends SyncbackIMAPTask {
   description() {
     return `DeleteFolder`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-label.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-label.imap.js
index 28b64f904..5df4fb288 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-label.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-label.imap.js
@@ -1,6 +1,6 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 
-class DeleteLabelIMAP extends SyncbackTask {
+class DeleteLabelIMAP extends SyncbackIMAPTask {
   description() {
     return `DeleteLabel`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-message.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-message.imap.js
index 5db7e0d99..87217b21d 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-message.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/delete-message.imap.js
@@ -1,7 +1,7 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class DeleteMessageIMAP extends SyncbackTask {
+class DeleteMessageIMAP extends SyncbackIMAPTask {
   description() {
     return `DeleteMessage`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/ensure-message-in-sent-folder.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/ensure-message-in-sent-folder.imap.js
index 1febacd16..7bffedf3f 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/ensure-message-in-sent-folder.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/ensure-message-in-sent-folder.imap.js
@@ -1,5 +1,5 @@
 const {SendmailClient, Provider, Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const SyncTaskFactory = require('../sync-task-factory');
 const {getReplyHeaders} = require('../../shared/message-factory')
 
@@ -126,7 +126,7 @@ async function setThreadingReferences(db, baseMessage) {
  * automatically created (keyed by the same Meassage-Id header we set),
  * then stuff a copy of the original message in the sent folder.
  */
-class EnsureMessageInSentFolderIMAP extends SyncbackTask {
+class EnsureMessageInSentFolderIMAP extends SyncbackIMAPTask {
   description() {
     return `EnsureMessageInSentFolder`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-read.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-read.imap.js
index 7a98626fd..9680d9b69 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-read.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-read.imap.js
@@ -1,7 +1,7 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class MarkMessageAsReadIMAP extends SyncbackTask {
+class MarkMessageAsReadIMAP extends SyncbackIMAPTask {
   description() {
     return `MarkMessageAsRead`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-unread.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-unread.imap.js
index 88d15b4ba..0b2a58fed 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-unread.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-message-as-unread.imap.js
@@ -1,7 +1,7 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class MarkMessageAsUnreadIMAP extends SyncbackTask {
+class MarkMessageAsUnreadIMAP extends SyncbackIMAPTask {
   description() {
     return `MarkMessageAsUnread`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-read.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-read.imap.js
index f75682923..2b37c5ece 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-read.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-read.imap.js
@@ -1,8 +1,8 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class MarkThreadAsRead extends SyncbackTask {
+class MarkThreadAsRead extends SyncbackIMAPTask {
   description() {
     return `MarkThreadAsRead`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-unread.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-unread.imap.js
index b944c6af8..2392df48e 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-unread.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/mark-thread-as-unread.imap.js
@@ -1,8 +1,8 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class MarkThreadAsUnread extends SyncbackTask {
+class MarkThreadAsUnread extends SyncbackIMAPTask {
   description() {
     return `MarkThreadAsUnread`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/move-message-to-folder.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/move-message-to-folder.imap.js
index 88d98f5d6..0e80369a6 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/move-message-to-folder.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/move-message-to-folder.imap.js
@@ -1,8 +1,8 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class MoveMessageToFolderIMAP extends SyncbackTask {
+class MoveMessageToFolderIMAP extends SyncbackIMAPTask {
   description() {
     return `MoveMessageToFolder`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/move-thread-to-folder.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/move-thread-to-folder.imap.js
index b1eb6c470..fb7b43ee1 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/move-thread-to-folder.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/move-thread-to-folder.imap.js
@@ -1,9 +1,9 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 const SyncTaskFactory = require('../sync-task-factory');
 
-class MoveThreadToFolderIMAP extends SyncbackTask {
+class MoveThreadToFolderIMAP extends SyncbackIMAPTask {
   description() {
     return `MoveThreadToFolder`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-folder.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-folder.imap.js
index 679d154b9..be8c24189 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-folder.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-folder.imap.js
@@ -1,7 +1,7 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 
-class RenameFolderIMAP extends SyncbackTask {
+class RenameFolderIMAP extends SyncbackIMAPTask {
   description() {
     return `RenameFolder`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-label.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-label.imap.js
index 8081ac1c3..1fb01b8a8 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-label.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/rename-label.imap.js
@@ -1,7 +1,7 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 
-class RenameLabelIMAP extends SyncbackTask {
+class RenameLabelIMAP extends SyncbackIMAPTask {
   description() {
     return `RenameLabel`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message-per-recipient.smtp.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message-per-recipient.smtp.js
index 446481ec0..476121079 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message-per-recipient.smtp.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message-per-recipient.smtp.js
@@ -1,46 +1,9 @@
-const {SendmailClient, Errors: {APIError}} = require('isomorphic-core')
+const {Errors: {APIError}} = require('isomorphic-core')
 const Utils = require('../../shared/utils')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackSMTPTask} = require('./syncback-task')
 const MessageFactory = require('../../shared/message-factory')
 
 
-async function sendPerRecipient({db, account, baseMessage, usesOpenTracking, usesLinkTracking, logger = console} = {}) {
-  const {Message} = db
-  const recipients = baseMessage.getRecipients()
-  const failedRecipients = []
-
-  for (const recipient of recipients) {
-    const customBody = MessageFactory.buildTrackingBodyForRecipient({
-      recipient,
-      baseMessage,
-      usesOpenTracking,
-      usesLinkTracking,
-    })
-
-    const individualizedMessage = Utils.copyModel(Message, baseMessage, {
-      body: customBody,
-    })
-    // TODO we set these temporary properties which aren't stored in the
-    // database model because SendmailClient requires them to send the message
-    // with the correct headers.
-    // This should be cleaned up
-    individualizedMessage.references = baseMessage.references;
-    individualizedMessage.inReplyTo = baseMessage.inReplyTo;
-
-    try {
-      const sender = new SendmailClient(account, logger);
-      await sender.sendCustom(individualizedMessage, {to: [recipient]})
-    } catch (error) {
-      logger.error(error, {recipient: recipient.email}, 'SendMessagePerRecipient: Failed to send to recipient');
-      failedRecipients.push(recipient.email)
-    }
-  }
-  if (failedRecipients.length === recipients.length) {
-    throw new APIError('SendMessagePerRecipient: Sending failed for all recipients', 500);
-  }
-  return {failedRecipients}
-}
-
 /**
  * This enables customized link and open tracking on a per-recipient basis
  * by delivering several messages to each recipient.
@@ -56,26 +19,21 @@ async function sendPerRecipient({db, account, baseMessage, usesOpenTracking, use
  * up in the sent folder and only a single message shows up in the sent
  * folder.
  */
-class SendMessagePerRecipientSMTP extends SyncbackTask {
+class SendMessagePerRecipientSMTP extends SyncbackSMTPTask {
   description() {
     return `SendMessagePerRecipient`;
   }
 
-  affectsImapMessageUIDs() {
-    return false
-  }
-
-  async run(db) {
+  async run(db, smtp) {
     const {
       messagePayload,
       usesOpenTracking,
       usesLinkTracking,
     } = this.syncbackRequestObject().props
-    const account = this._account
 
     const baseMessage = await MessageFactory.buildForSend(db, messagePayload)
 
-    const sendResult = await sendPerRecipient({db, account, baseMessage, usesOpenTracking, usesLinkTracking})
+    const sendResult = await this._sendPerRecipient({db, smtp, baseMessage, usesOpenTracking, usesLinkTracking})
 
     /**
      * Once messages have actually been delivered, we need to be very
@@ -106,6 +64,42 @@ class SendMessagePerRecipientSMTP extends SyncbackTask {
       return {message: {}, failedRecipients: []}
     }
   }
+
+  async _sendPerRecipient({db, smtp, baseMessage, usesOpenTracking, usesLinkTracking} = {}) {
+    const {Message} = db
+    const recipients = baseMessage.getRecipients()
+    const failedRecipients = []
+
+    for (const recipient of recipients) {
+      const customBody = MessageFactory.buildTrackingBodyForRecipient({
+        recipient,
+        baseMessage,
+        usesOpenTracking,
+        usesLinkTracking,
+      })
+
+      const individualizedMessage = Utils.copyModel(Message, baseMessage, {
+        body: customBody,
+      })
+      // TODO we set these temporary properties which aren't stored in the
+      // database model because SendmailClient requires them to send the message
+      // with the correct headers.
+      // This should be cleaned up
+      individualizedMessage.references = baseMessage.references;
+      individualizedMessage.inReplyTo = baseMessage.inReplyTo;
+
+      try {
+        await smtp.sendCustom(individualizedMessage, {to: [recipient]})
+      } catch (error) {
+        this._logger.error(error, {recipient: recipient.email}, 'SendMessagePerRecipient: Failed to send to recipient');
+        failedRecipients.push(recipient.email)
+      }
+    }
+    if (failedRecipients.length === recipients.length) {
+      throw new APIError('SendMessagePerRecipient: Sending failed for all recipients', 500);
+    }
+    return {failedRecipients}
+  }
 }
 
 module.exports = SendMessagePerRecipientSMTP;
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message.smtp.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message.smtp.js
index 26562ff3b..cf43d3ef8 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message.smtp.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/send-message.smtp.js
@@ -1,6 +1,5 @@
-const {SendmailClient} = require('isomorphic-core')
-const SyncbackTask = require('../syncback-tasks/syncback-task')
 const MessageFactory = require('../../shared/message-factory')
+const {SyncbackSMTPTask} = require('../syncback-tasks/syncback-task')
 
 /**
  * This sets up the actual delivery of a message.
@@ -11,29 +10,23 @@ const MessageFactory = require('../../shared/message-factory')
  * We later get EnsureMessageInSentFolder queued to ensure the newly
  * delivered message shows up in the sent folder.
  */
-class SendMessageSMTP extends SyncbackTask {
+class SendMessageSMTP extends SyncbackSMTPTask {
   description() {
     return `SendMessage`;
   }
 
-  affectsImapMessageUIDs() {
-    return false
-  }
-
-  async run(db) {
+  async run(db, smtp) {
     const {messagePayload} = this.syncbackRequestObject().props
 
     const message = await MessageFactory.buildForSend(db, messagePayload);
-    const logger = global.Logger.forAccount(this._account);
-    const sender = new SendmailClient(this._account, logger);
-    await sender.send(message);
+    await smtp.send(message);
 
     try {
       message.setIsSent(true)
       await message.save();
       return {message: message.toJSON()}
     } catch (err) {
-      logger.error(err, "SendMessage: Failed to save the message to the local sync database after it was successfully delivered")
+      this._logger.error(err, "SendMessage: Failed to save the message to the local sync database after it was successfully delivered")
       return {message: {}}
     }
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/set-message-labels.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/set-message-labels.imap.js
index 2802f6178..959526a88 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/set-message-labels.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/set-message-labels.imap.js
@@ -1,7 +1,7 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class SetMessageLabelsIMAP extends SyncbackTask {
+class SetMessageLabelsIMAP extends SyncbackIMAPTask {
   description() {
     return `SetMessageLabels`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-folder-and-labels.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-folder-and-labels.imap.js
index b4a827a94..c6c847a55 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-folder-and-labels.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-folder-and-labels.imap.js
@@ -1,10 +1,10 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 const SyncTaskFactory = require('../sync-task-factory');
 
 
-class SetThreadFolderAndLabelsIMAP extends SyncbackTask {
+class SetThreadFolderAndLabelsIMAP extends SyncbackIMAPTask {
   description() {
     return `SetThreadFolderAndLabels`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-labels.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-labels.imap.js
index c3163a3a3..4a737bf2a 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-labels.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/set-thread-labels.imap.js
@@ -1,8 +1,8 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class SetThreadLabelsIMAP extends SyncbackTask {
+class SetThreadLabelsIMAP extends SyncbackIMAPTask {
   description() {
     return `SetThreadLabels`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/star-message.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/star-message.imap.js
index fa5319440..ff0388840 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/star-message.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/star-message.imap.js
@@ -1,7 +1,7 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class StarMessageIMAP extends SyncbackTask {
+class StarMessageIMAP extends SyncbackIMAPTask {
   description() {
     return `StarMessage`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/star-thread.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/star-thread.imap.js
index e70389b2f..779ede6bb 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/star-thread.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/star-thread.imap.js
@@ -1,8 +1,8 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class StarThread extends SyncbackTask {
+class StarThread extends SyncbackIMAPTask {
   description() {
     return `StarThread`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/syncback-task.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/syncback-task.es6
similarity index 69%
rename from packages/local-sync/src/local-sync-worker/syncback-tasks/syncback-task.js
rename to packages/local-sync/src/local-sync-worker/syncback-tasks/syncback-task.es6
index 6e89841c9..9c7120311 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/syncback-task.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/syncback-task.es6
@@ -19,6 +19,10 @@ class SyncbackTask {
     throw new Error("Must return a description")
   }
 
+  resource() {
+    throw new Error("Must return a resource. Must be one of ['imap', 'smtp']")
+  }
+
   affectsImapMessageUIDs() {
     throw new Error("Must implement `affectsImapMessageUIDs`")
   }
@@ -27,4 +31,17 @@ class SyncbackTask {
     throw new Error("Must implement a run method")
   }
 }
-module.exports = SyncbackTask
+
+export class SyncbackIMAPTask extends SyncbackTask {
+  resource() {
+    return 'imap'
+  }
+}
+
+export class SyncbackSMTPTask extends SyncbackTask {
+  resource() {
+    return 'smtp'
+  }
+}
+
+export default SyncbackTask
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-message.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-message.imap.js
index 89de06c54..3a25167d9 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-message.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-message.imap.js
@@ -1,7 +1,7 @@
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class UnstarMessageIMAP extends SyncbackTask {
+class UnstarMessageIMAP extends SyncbackIMAPTask {
   description() {
     return `UnstarMessage`;
   }
diff --git a/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-thread.imap.js b/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-thread.imap.js
index 6e835de75..5b74f100a 100644
--- a/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-thread.imap.js
+++ b/packages/local-sync/src/local-sync-worker/syncback-tasks/unstar-thread.imap.js
@@ -1,8 +1,8 @@
 const {Errors: {APIError}} = require('isomorphic-core')
-const SyncbackTask = require('./syncback-task')
+const {SyncbackIMAPTask} = require('./syncback-task')
 const IMAPHelpers = require('../imap-helpers')
 
-class UnstarThread extends SyncbackTask {
+class UnstarThread extends SyncbackIMAPTask {
   description() {
     return `UnstarThread`;
   }