Mail Signature

Easily edit email signatures?
Now you can with the Mail Signature app for Mac Mail.

Mail Signature
Comfortable Signing

Advanced Tools

The app offers powerful tools in addition to the classic creation.

Visual Editor

The visual editor allows to design the signature without programming knowledge.

Import & Export

Allows to save and share the signatures locally.

HTML input

The editor provides direct editing of the signature source code.

Dark Mode

The app can switch to Dark and Light mode at any time.

Behind the Scenes

The Features in Detail

To make editing even easier but also professional, there are several tools and features.

Do you have questions?

FAQs about the app

Here you will find answers to the most frequently asked questions about the Mail Signature app.

An email signature is like a digital business card at the bottom of an email that identifies the sender and also contains contact information or other relevant details about the sender.

The Mail Signature App is an application software for creating email signatures, especially for Apple Mail. The app is developed for macOS devices with active Apple Mail and serves as an extension of the signature function.

The app is available:

  • For free with limited functions
  • Fee-based with full functionality with an in-app purchase (activation of the fee-based Pro version in the free version of the app).

The app is suitable for anyone who creates email signatures with Apple Mail and attaches them to their email messages. You can use the visual editor to create and edit your texts and image files. No programming knowledge is required.

For users with HTML skills, the app offers an HTML editor in the Pro version (in-app purchase), which you can use to write the signatures in HTML code.

The Mail Signature app is made for use on macOS devices. The minimum requirements to ensure that the app works properly:

  • A desktop device with the macOS 10.11.0 operating system or newer
  • An active e-mail account in Apple Mail

No, you don’t need to register. All you need is at least one active e-mail account in Apple Mail.

Mail is an e-mail application from Apple. You will find Apple Mail pre-installed on your Mac computer. It is also known as “Apple Mail” or Mail App.

The app runs on macOS devices with operating system 10.11.0 (Mac OS X El Capitan) or newer.

MacOS is the operating system of the technology company Apple Inc. for laptop and desktop computers of the Mac models, e.g. MacBook, iMac, Mac mini etc.

Apple Mail is already pre-installed on your Mac and the version depends on the operating system. You need a macOS device with operating system 10.11.0 (Mac OS X El Capitan) or newer to use the Mail Signature app.

The app requires certain access permissions before it can be used. The app requires the following permissions:

  • Access to the Mailbox folder to read and save the signatures
  • Access to the Mail Accounts folder to read the names of the mail accounts
  • Access to the Home folder to keep your iCloud Drive synchronized.

In addition, you can optionally grant access to the Mail settings in the “Preview” section of the already installed app. After this permission, the default fonts and font sizes are exactly the same as in Apple Mail. This is required if the signature does not use its own font size/font and uses the default settings of Apple Mail.

With the Pro version (in-app purchase) you can use all functions.

The Pro version offers:

  1. Visual editor (full range of functions), e.g:
    • Table function
    • Horizontal or vertical dividing line
    • Indent & outdent content
    • Determine fonts and sizes yourself
    • Link indicator
    • Retina resolution for image attachments

2. HTML editor
3. Import & export
4. Preview
5. Light / dark mode

The free version offers:

  1. Visual editor (limited function)
  2. Preview
  3. Light / dark mode

The app is currently only available to download from the Mac App Store (MAS). In future, the app can also be purchased outside the store.

Download here:

The app is not available for Android- and iOS-based devices.

With the in-app purchase of the Pro version you can use the app in full functionality. One-off payment, no subscription!

Mail Signature Pro costs 9.99 euros incl. 19% VAT in Germany (as of 12.2023). The price may vary depending on the country.

In-app purchases are additional content, services or subscriptions that you buy in an already installed app.

The in-app purchase is processed via the Mac App Store. The conditions of the store apply.

In your Apple ID, you enter your preferred payment method, e.g. credit or debit card, PayPal, etc.

You receive an invoice from Apple after every purchase. You can usually find these in your iCloud mailbox or in the mailbox you have specified for your Apple ID. The receipts can also be accessed in your App Store purchase statistics or via the Report-a-Problem portal. On the receipt you can see what was purchased and which Apple ID was used.

You can return your App Store purchases within 14 days of purchase.* The Mac App Store will process the cancellation and refund you the full payment.

It is not possible to transfer the in-app purchases to another Apple ID or to another operating system (e.g. Android)!

*The conditions for the refund may be different depending on the country or region.

The Pro version (in-app purchase) is available on all macOS devices where the mac user is assigned to the same Apple ID. The Pro version can be subsequently activated on your other devices by using the “Restore” button in the purchase dialog.

For the restore to work, you must be logged in with the same Apple ID that you made the in-app purchase with. If you are unsure, check your App Store purchase history or your email inbox for the purchase receipt from the Mac App Store.

It is not possible to transfer the purchased apps to another Apple ID or to another operating system (e.g. Android)!

The latest version of the Mail Signature App is 2.0.0 (as of 04.2023).

Go to About Mail Signature in the app menu. The app shows you the installed version here.

To update the app, open the Mac App Store and go to the “Updates” tab. If a newer version is available, you will see it in the list of apps to be updated.

We recommend that you always update the app to the latest version.

The app can be used offline, which means that an Internet connection, i.e. WLAN or mobile data, is not absolutely necessary. You only need an internet connection when downloading or updating the app.

However, all images integrated via web address are only visible in the editor with an existing Internet connection!

No, the signature you create with this app is only available for Apple Mail on your MacOS device. For Outlook and other email clients, you have to create a signature separately in the respective client.

Theoretically, you could also copy the HTML code (without attachments) and reuse it in other apps or email programs. However, there is no guarantee that the HTML code is fully compatible with other applications.

The signatures are currently only available on MacOS with Apple Mail. However, a sent signature can be marked, copied and pasted in the signature settings in the Mail App of the iOS device. But compatibility is not guaranteed here.

This happens completely automatically. The signatures in Mail Signature are 100% synchronized with the signatures in Apple Mail on your Mac device. This means that if you create and edit a signature in Mail Signature, it will automatically appear as a signature in Apple Mail. However, you must restart Apple Mail after saving for the changes to take effect.

Surely. In the editor you can format your email signature and modify it at any time.

Yes, you can add images in JPG, PNG and SVG formats to your signature using the visual editor. You also have the option of integrating high-resolution retina images in the Pro version (in-app purchase).

The images can be added ” Via attachment” or “Via address”.

“Via attachment” allows you to select a local image saved on your computer in SVG, JPG or PNG format. This image is permanently integrated into the signature and is a fixed part of the signature. Each time you send an email, the image is stored in the email’s data memory. This guarantees that the image is immediately visible to the recipient.

“Via address” you can specify an image that is stored online on a web server. To do this, you need the full web address of the image ( The e-mail sent only contains the link to the image. The e-mail is therefore technically smaller in terms of storage space (size), but there is a risk that the image will only be visible on request. It depends on the recipient’s settings.

Yes, you can edit saved signatures at any time. Press “Save” to apply the changes. To ensure that these are also visible in Apple Mail, please restart Apple Mail every time you save a change.

Restart Apple Mail so that it can import the changes from Mail Signature App.

Place the cursor at the desired position in an empty line. Click on the ” Dividing line” symbol in the toolbar to open a dialog. Enter 1 px for the width and the desired number of pixels for the height, e.g. 100 px. The dialog has a preview that shows you the current style of the line.

To use the HTML mail signature, you must have knowledge of HTML to write the code for your signature yourself. Theoretically, you can also use ready-made HTML code from the Internet or from the Mail Signature app (Pro version).

To use the Mail Signature App, HTML knowledge is only optionally required. You can create your own signature with the visual editor. The editor is structured like Word. Depending on the version (free or Pro), various functions are available to you. Extended editor functions, images with Retina resolution and the HTML editor are available in the Pro version (In-App Purchase). With the HTML editor, which you receive in the Pro version, you can edit the HTML code generated by the visual editor at any time. You have complete control over the source code of your signature. You can also export this code and save it as a backup or share it with others.

HTML means “Hypertext Markup Language” and is a web markup language for website design.

Signatures can be exported from the Mail Signature Pro app as a *.mailsignature file. The import function allows you to import *.html files as well as *.mailsignature files.
  1. Export
    • Backup and recovery in case of loss The export as a *.mailsignature file serves to save the signatures separately outside the, e.g. on the respective device. This file serves as a backup and can be restored at any time via the import.Each signature must be exported separately and imported again separately. Make regular backups so that an up-to-date backup copy is always available. The signature exported as a *.mailsignature file cannot be imported into other email programs and is compatible with Mail Signature, HTML Mail Signature and Apple Mail.
    • Share with others Share the exported signature with others simply by sending a file. In large companies, it is also sufficient to create a signature template. Employees can import the file and adapt it to their contact details.
  2. Import It is possible to import signatures in .mailsignature and .html formats. It is used, for example, to restore deleted signatures or to insert third-party signatures as templates. It is also an option to import or copy a ready-made e-mail signature in .html format from the Internet.

The app is available in the following languages:

  • German
  • English
  • Spanish
  • French
  • Russian.

The language of the app is automatically chosen according to the preset language of your device’s operating system. To change the language of the app to English, change the language of your device to English.

The app does not collect, process or store any personal user data.

Your feedback is very important to us! Please send us your feedback, idea, suggestion, question or error message by clicking on the Contact button on our website or send a message by e-mail to . Thank you!

It is also possible to report a problem directly in the app menu by clicking on Help. In the support area of the website that appears, fill in the fields and describe the problem.

You can rate our apps in the Mac App Store (1-5 stars) and write a review.

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Mail Signature

The Mail Signature app is available for free download from the Mac App Store.

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