# Synology MailPlus

> Mobile email client for Synology MailPlus server with advanced organization and quick response features. (iPhone/iPad app by Synology Inc..)

- Source: https://appshunter.io/ios/app/synology-mailplus/id967913737 (this page in markdown: same URL + `.md`)
- Developer: [Synology Inc.](https://appshunter.io/developer/321493109)
- Category: Productivity, Utilities
- Price: Free
- Rating: 3.80/5 from 19 App Store ratings · 80 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 100 MB
- Languages: German (Germany), Danish, American English, French (France), Italian, Japanese, Korean, Dutch, Norwegian Bokmål, Norwegian Nynorsk and 11 more
- Released: 2015-10-30
- Data updated: 2026-08-13
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/synology-mailplus/id967913737/reviews.md

## What is Synology MailPlus?

**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

## Key features

- Swipe gestures for quick actions
- Quick-reply templates
- Compose and attach files
- Create mailboxes and labels
- Advanced search
- Offline cache for attachments
- Customizable unread badge

## Recent user reviews (10 of 80)

All indexed reviews: https://appshunter.io/ios/app/synology-mailplus/id967913737/reviews.md

### 1/5 — Regular failed connectivity

*2026-07-03*

The app regularly fails to connect with my NAS. It works for a while but invariably will simply stop making connections. I can find no information on Synology’s help portal for this issue.

### 1/5 — 0/5 Star

*2026-05-27, version 3.0.2*

The Synology MailPlus app is completely outdated. The developer has lost touch with the features that competitors offer. If you’re considering this product, you’re better off choosing the competition.

What app lacks:
- basic text formatting (size, style, type) for both the email body and the signature
- the signature doesn’t allow adding a company logo
- photo insertion doesn’t offer automatic file size reduction 
- the app contains no useful features beyond pointless calendar 
- forget about any kind of automation 

I have never had a worse email app on my phone.

In its current state, I DO NOT RECOMMEND it!

### 1/5 — Passwort ist in Klartext sichtbar

*2026-05-12*

An sich ist die App ganz okay, aber ich finde es doch sehr bedenklich, dass oben links unterhalb des Benutzernamens mein Passwort in Klartext angezeigt wird. Auch wenn ich eingeloggt bin, ist das trotzdem ein No Go !!!

### 3/5 — Calendar enhancements

*2026-04-27*

I find myself using this app for sending calendar invites because of Synology’s poor integration with iOS calendar. It is ok, I wish it remembered whether you were in the mail or the calendar tab last time and started back in the same tab. It also shows weird messages like asking if I want to send decline message when I am the one sending an invite (should ask if I want to send invite). When sending invites, allow contact search instead of just searching for email addresses. Also if you want it to be an all in one app, add the ability to see multiple email accounts like outlook.

### 2/5 — Problematique

*2025-12-12, version 3.0.1*

MailPlus iOS se présente comme une application professionnelle, cependant l’expérience utilisateur actuelle ne reflète pas encore ce positionnement. À l’usage, l’interface web se révèle nettement plus ergonomique et productive que la version iOS, qui souffre d’un excès de minimalisme au détriment de l’efficacité opérationnelle.

L’absence d’options de mise en page, une vue en conversation peu adaptée au suivi de volumes importants d’échanges, ainsi qu’un manque de personnalisation des vues rendent l’application difficilement exploitable dans un contexte professionnel réel.

Au-delà de l’interface, il manque également des fonctionnalités clés de pilotage des flux entrants, pourtant essentielles dans un cadre professionnel :
– possibilité de demander une confirmation ou une validation automatique pour les e-mails entrants ne faisant pas partie d’une base de contacts préalablement approuvée ;
– règles avancées permettant d’identifier, filtrer et prioriser automatiquement les messages issus de formulaires web (demandes clients, réservations, contacts site) ;
– gestion intelligente des horaires de réception, avec envoi automatique de réponses personnalisables en dehors des heures d’ouverture (message d’indisponibilité, délai de réponse, redirection éventuelle).

Ces fonctionnalités existent déjà partiellement dans de nombreux environnements professionnels et sont déterminantes pour une adoption à grande échelle.

En l’état, je continue donc d’utiliser Apple Mail, qui offre une gestion plus ouverte et plus pragmatique des comptes et des règles. Je suivrai néanmoins avec intérêt les évolutions UX/UI et fonctionnelles de MailPlus iOS, en espérant une montée en maturité alignée avec l’excellence matérielle et logicielle habituellement associée à l’écosystème Synology.

Aujourd’hui, l’application donne encore le sentiment d’un produit trop immature pour un usage professionnel intensif.

### 4/5 — Gutes Tool zur Abfrage der Mails des Kalenders vom NAS

*2025-12-03*

Hallo liebes Entwicklerteam! 
Ich bin total begeistert von der Synology MailPlus App. Die Synchronisation funktioniert sehr gut und es läuft besser als das Telefon basierte Mailprogramm. Was ich mir für die Zukunft wünschen würde, wäre die Verknüpfung mit den im Handy gespeicherten Geburtstagen der jeweiligen Kontakte.
Gruß 
CK

### 2/5 — 不能登入

*2025-10-11, version 3.0.0*

一直顯示沒有權限 
到底要等多久才能登入

### 3/5 — Connection issues

*2025-10-05*

In terms of functionality and features, it is great. It does however, have a connection issue which requires me to quit the app, reopen in order for it to reconnect.

**Developer response:** We're sorry to hear about the issues you're experiencing. For further assistance, please submit a support ticket at https://account.synology.com/support/create/ticket , and our team will be happy to help. Thank you for your feedback.

### 2/5 — Schöne Idee mit vielen Schwächen

*2025-09-03*

Die Idee, die E-Mails auf dem eigenen Server zu speichern und zu verwalten, finde ich super! Ein großes Problem ist die ganze Terminverwaltung im Kalender: es ist auf dem Handy nicht vernünftig möglich Termin Einladungen zu akzeptieren: er erstellt mir dann einen Eintrag für den Tag, an dem ich die Einladung akzeptiere, und nicht für den Tag, der im Termin eingetragen ist. Bitte dringend nachbessern, und bevor man es veröffentlicht, sollte es bitte intern getestet werden!
Edit: kommt noch ein Update wie man Termin Einladungen besser akzeptieren kann, wenn die zum Beispiel von einem Google Account gesendet werden? 🤔

### 4/5 — everything ok except one issue

*2025-08-27*

i love this app, a must have if you use synology mailplus server. please fix this issue: if i answer an email, ill get my own answer in CC. this is annoying.

**Developer response:** We're sorry to hear about the issues you're experiencing. For further assistance, please submit a support ticket at https://account.synology.com/support/create/ticket , and our team will be happy to help. Thank you for your feedback.

## Frequently asked questions about Synology MailPlus

### Does Synology MailPlus require a Synology NAS?

Yes, you must own a Synology NAS to run this app. The app also requires MailPlus server to be running on your Synology DiskStation to access its full feature set.

### What devices does Synology MailPlus support?

Synology MailPlus is available for iPhone and iPad, as indicated by its support for iOS devices.

### Is Synology MailPlus free to use?

Yes, Synology MailPlus is available for free. The app has a 'Free' price listed and does not mention any in-app purchases or subscription fees.

### How often is Synology MailPlus updated?

The latest version of Synology MailPlus is 3.0.2, which was last updated on December 23, 2025. This indicates a recent update, suggesting the app is actively maintained.

### What is the age rating for Synology MailPlus?

Synology MailPlus has an age rating of 4+. This means it is suitable for users aged 4 and above.

### Can I use Synology MailPlus offline?

Yes, Synology MailPlus offers an offline cache feature. This allows you to browse previously viewed attachments and images even without an active internet connection.

### How does Synology MailPlus handle security?

Synology MailPlus supports HTTPS for secure connections. This ensures that your email communication is encrypted and protected.

### What do users like about Synology MailPlus?

Based on its 4.1-star rating from 17 ratings, users likely appreciate its intuitive design, efficient swipe gestures, and quick-reply templates for managing emails on the go.

## Version history (last 5 releases)

### 3.0.2 — 2025-12-23

Fixed Issues
1. Fixed an issue where the AI summary output language did not follow the device's system language.
2. Minor bug fixes.

### 3.0.1 — 2025-10-13

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.

### 3.0.0 — 2025-09-30

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.

### 2.7.0 — 2024-11-05

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.

### 2.6.0 — 2024-05-07

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.

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All apps by Synology Inc.: https://appshunter.io/developer/321493109

## Related topics

[synology chat](https://appshunter.io/ios/topics/synology-chat)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-13.*