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E-Mail: Digital signature add - so it works

  • Oct 25, 2025
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How to add your e-mail with a digital signature, we will show you on the basis of Outlook, GMX and Thunderbird.

Signature in Outlook, paste - how to

In Outlook you can create a so-called "free-hand signature" you can create, and the directly in the program:
  1. You compose a new message and click in the input field.
  2. You start the "free-hand input". You can find this on the far right under "free hand".
  3. Sign then keeping the mouse button pressed. If you have a touch screen, you can directly with your Finger or a special pen to sign.
Outlook: direct signature

Signature for GMX and Thunderbird

So you are in Thunderbird and GMX your signature to the E-Mail folders, you need to make a small detour to take:
  1. Download the free image editing tool "GIMP" to download and install it.
  2. Start GIMP and create a new file.
  3. Then open the advanced settings and select the filling of "transparency".
  4. Draw now as for Outlook, your signature either with the mouse, your Finger or a stylus.
  5. Then save the image as .png-file via "file" > "Export".
Signature create in "GIMP"

GMX: signature insert

After you have created the signature in the GIMP, do the following:
  1. Log in to Gmail with your account data.
  2. Click on the Button "E-Mail".
  3. The advanced formatting options, click on "More".
  4. Click on the image icon, the previously created signature as an image to insert it.
  5. You are looking for your signature and place them at the best at the end of the E-Mail.

Thunderbird: signature insert

Also in Thunderbird you can insert your own created signature:
  1. Go to the account settings of your Email account. You right-click on the account name, and finally click on "account settings".
  2. You set the hook "Instead of a file as a signature append (Text, HTML, or graphics)".
  3. Then click "Browse" and locate the image with your signature.
  4. This will then appear on every E-Mail, the mail of the account you are currently editing.
Thunderbird: signature embed
More security can be reached by E-Mail to add a digital signature to. How we betrayed them in a further practical tip.

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