Synology MailPlus
Productivity
Free
**You must own a Synology NAS to run this app, and be running the MailPlus to get the complete set of features**
Composing emails or replying to messages on mobile devices can be a hassle. With the intuitive design of MailPlus, you can accomplish more with less effort. Organize your emails right in the palm of your hand. The swipe gestures allow you to quickly apply desired actions to your emails. Quick-reply templates save repeated keystrokes and make your reply even more efficient. With MailPlus, managing emails is only a few taps or swipes away.
With MailPlus for iPhone/iPad, you can:
-Compose an email and enrich the content with built-in emoticons
-Attach files on your mobile device to the message
-Create mailboxes and labels
-Customize swipe gestures
-Use quick-reply templates to reply to emails efficiently
-Share browser content with your friends via MailPlus
-Customize the unread email badge to only show notifications for certain labels and mailboxes
-Find emails efficiently with advanced search
-Offline cache stores previously viewed attachments and images for you to browse later even without Internet connection
-Supports HTTPS for secure connection
-All features are available with DSM 6.0 and MailPlus 1.2.0 running on Synology DiskStation
more Fixed Issues
1. Fixed an issue where the AI summary output language did not follow the device's system language.
2. Minor bug fixes.
3.0.2 23/12/2025
Important Note
1. AI features require Synology MailPlus 3.4.0 and Synology AI Console 1.1.0. Get started by configuring settings in Synology AI Console.
Compatibility & Installation
1. This update is only available on iOS 17.0 and above.
Fixed Issues
1. Fixed the "No permission" error message that appeared during a login.
2. Minor bug fixes.
3.0.1 13/10/2025
Important Note
1. AI features require Synology MailPlus 3.4.0 and Synology AI Console 1.1.0. Get started by configuring settings in Synology AI Console.
Compatibility & Installation
1. This update is only available on iOS 17.0 and above.
What's New
1. Enhanced email workflow with AI-powered features for drafting, refining, and summarizing emails.
2. Supports auto reply. To set it up, go to Settings > Compose & Reply > Auto Reply.
3. Supports scheduled email sending. To schedule an email, click the More icon and select Schedule Send.
4. Supports calendar month view.
5. Supports calendar event search.
Fixed Issues
1. Minor bug fixes.
3.0.0 30/09/2025
What's New
1. Supports priority mailbox, which displays emails from specific mailboxes or labels in a single view, based on your MailPlus web client settings. To enable this feature, go to Settings > Mailbox Settings > Enable priority mailbox.
2. Supports creating shared links for large attachments, with local files uploaded to the home folder. To use this feature, enable shared links in MailPlus Server > Service > MailPlus Client.
3. Added an option to open shared links directly in Synology Drive on mobile devices instead of using the default browser.
4. Supports type-to-search for labels and mailboxes when labeling or moving emails.
5. Supports composing with inline images.
6. Allows collapsing and expanding subfolders.
Fixed Issues
1. Minor bug fixes.
2.7.0 05/11/2024
Compatibility & Installation
1. This update is only available on iOS 16.0 and above.
2. To use mobile calendar features, update the server to Synology Calendar 2.5.0.
What’s New
1. Integrated Synology Calendar's features into Synology MailPlus, allowing users to conveniently view, manage, and filter events to prioritize important matters.
2. Supports daily summaries for calendar events.
3. Supports attachment reminder when "attachment" or "attached" is mentioned in the email content without an attached file.
4. Supports unsending emails within 5 seconds after sending, provided that the send cancellation period is set up in the MailPlus web client.
Fixed issues
1. Fixed incorrect email count after email deletion.
2. Minor bug fixes.
2.6.0 07/05/2024
Compatibility & Installation
1. This version requires Synology MailPlus 2.0.0 or above.
What's New
1. Supports displaying email attachments encrypted with S/MIME.
2. Updated the style of text stickers.
3. Supports being set as the default email application.
4. Supports turning on or off conversation mode.
Fixed Issues
1. Fixed an issue where the automatic clearing of push notifications might not function properly.
2. Minor bug fixes.
2.5.0 25/04/2023
Compatibility & Installation
1. Please update the web client to Synology MailPlus 3.0.0 for the new features of schedule send and multiple signatures.
What's New
1. Supports viewing scheduled messages in conversations and reverting to drafts.
2. Supports applying the web client's signature settings for new messages and replies.
3. Supports dark mode. The theme can be modified in app settings.
4. Supports dynamic font size. The font size will be automatically adjusted according to the system settings.
5. Lists recently used mailboxes and labels for quick selection.
Fixed Issues
1. Fixed an issue where users might encounter login errors after editing connections.
2. Minor bug fixes.
2.4.0 22/11/2022
What's New
1. Supports contact search and displays contacts from Synology Contacts by name.
2. Supports viewing email history with contacts and editing contact information.
3. Supports displaying photos assigned in Synology Contacts on the email list.
Fixed Issues
1. Fixed an issue where users could not add events to Synology Calendar by clicking on dates in an email.
2. Fixed an issue where message content at the bottom of a long email might not be fully displayed.
3. Fixed an issue where tables in an email might not be displayed properly.
4. Fixed an issue where the badge count for the Sent mailbox was incorrect.
2.3.0 27/06/2022
1. Fixed an issue with the possible flickering of email content.
2.2.1 09/03/2022
1. Added a quick reply box.
2. Supports nested labels.
3. Supports moving emails from Sent to another mailbox.
4. Supports creating sub-mailboxes under Inbox.
5. Supports displaying HEIC/HEVC thumbnail images for attachments when "Advanced Media Extensions" is installed on NAS.
6. Fixed an issue where unread emails in a hidden mailbox would be counted as unread.
7. Minor bug fixes.
2.2.0 19/10/2021
1. The update is expected to be available in all regions within the next few days. The actual time of release may vary slightly depending on the region.
2. Added new emojis.
3. Enhanced the connection process over QuickConnect to strengthen the security.
4. Supports TLS 1.3 in accordance with the modern compatibility of DSM 7.0.
5. Supports viewing images and tables by long-pressing push notifications.
6. Fixed an issue where users might open an unexpected email because the provided preview text did not match the actual content.
7. Fixed an issue where users could not open calendars and event invitations sent from Microsoft Outlook.
8. Fixed an issue where users could not move the cursor by pressing the arrow keys when writing emails with an external Bluetooth keyboard.
9. Fixed an issue where the app might quit unexpectedly when email printing was canceled.
2.1.0 07/04/2021
1. The latest Synology MailPlus requires iOS 12 or later.
2. Please update Synology Application Service to the latest version (1.7.0-0459) to ensure the functionality of the account switching feature.
3. Supports multiple account login, where notifications for all logged-in accounts are displayed and the total number of unread emails is shown.
4. Supports fetching contacts from Synology Contacts.
5. Supports customizing the toolbar in Email Viewer.
6. Supports showing recipients in Sent.
7. Increased the speed of opening an email from a push notification.
8. Fixed the issue where the intended recipients in the reply-to field were not added correctly.
9. Fixed the issue where opening multiple emails might cause the cache size to exceed the limit.
10. Fixed the issue where the number of unread emails was not updated in real time.
11. Fixed the issue where an email that could not be delivered was saved into two drafts.
2.0.0 22/10/2020
1. Supports using signatures created in MailPlus web client.
2. Supports quick actions on email notifications, including “Delete”, “Archive”, and “Mark as read”.
3. Supports deleting search history.
4. Fixed an issue where inserted photos or videos could not be displayed in a draft email.
1.11.0 01/07/2019
1. Enhanced the stability of QuickConnect services in China
2. Minor bug fixes
1.10.1 26/03/2019
1. iOS MailPlus 1.10.0 is only compatible with MailPlus 1.1.0 and above
2. Supports using swipe gestures to go to the next or previous email thread
3. Optimized interface display for iPad Pro 2018 and iPhone XS Max
4. Fixed an issue where stickers and emojis might not be selected when the device is connected to Bluetooth keyboard
5. Minor bug fixes
1.10.0 23/01/2019
1. Optimized interface display for iPhone XS Max
2. Fixed an issue where it might crash when using Touch ID on iPhone X
3. Minor bugs fixes
1.9.1 22/10/2018
1. Supports encrypting the content of push notification for new mails before sending it to third-party push notification servers.
2. Minor bug fixes.
1.9.0 14/08/2018
- Updated Synology's terms and conditions for EU data privacy compliance
1.8.0 23/05/2018
- Supports the UI layout of iPhone X.
- Supports viewing images in attachments with image viewer without downloading.
- Supports multi-selecting images and attaching them to mails.
- Supports reporting suspicious mails to system administrator to enhance spam learning.
- Minor bug fixes.
1.7.0 01/03/2018
- Fixed a security vulnerability regarding MailSploit. (Synology-SA-17:82)
- Fixed an issue where attaching files or photos to mails via third-party apps might fail.
1.6.1 02/01/2018
- Supports internationalized email address to send mails with or receive mails from email addresses in local languages (e.g. Chinese and Russian).
- Minor bug fixes.
1.6.0 01/12/2017
．Added format compatibility in iOS 11, in which HEIF images will be converted to JPEG images when attaching photos to emails
1.5.2 25/09/2017
- Fixed an issue where read emails might be marked as unread when using the mobile network.
1.5.1 27/07/2017
- Supports managing emails in shared mailboxes
- Supports disabling auto-highlighter for date and time texts in email body
- When you reply to messages, the system will auto-select the replying email address where the message was received (with the corresponding SMTP option enabled in the MailPlus web client)
- Fixed an issue where attachments in the draft might be lost if delivery failed
- Fixed an issue where opening drafts created on the mobile device in the offline mode might fail
- Fixed an issue where checked emails might be marked unread
- Enhanced application stability
- Minor bug fixes
1.5.0 12/07/2017
- Supports showing long email in an independent view
- Supports showing all recipient email addresses with one tap on the recipient field
- Added one option for collapsing all mail messages
- Fixed an issue where body of certain mail might disappear in view
- Fixed an issue where text pasted from other mail might appear in larger font size
- Fixed an issue where dates in mail body might not be properly highlighted
- Minor bug fixes
1.4.1 09/03/2017
Fixed Issues
1. Fixed an issue where the AI summary output language did not follow the device's system language.
2. Minor bug fixes.
more Version 3.0.2 23/12/2025
Data Not Linked to You The following data may be collected but it is not linked to your identity:
