Signatures

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Creating Signatures

To create a new signature, go to:

On macOS: Preferences > Composition > Signatures

On Windows: Tools > Options > Composition > Signatures

Next, click the Add or + button to open the editor dropdown. Create your signature and use the formatting buttons to style your entry. You can create additional signatures by simply clicking the Add or + button again. To edit an existing signature, click the Pencil button below the list.

sig2_2x.png

Note: To add a link to your signature as you're editing it, click the Link button and enter the URL (including "HTTP://"), and then click OK.

If you'd like to add more style to your signatures in Postbox, the formatting toolbar provides options to change text size, color, decoration, and indent placement. However, if you would like further control, this can be achieved by editing the underlying HTML and CSS.

Editing the HTML and CSS

To customize the style of a signature:

  • Go to Preferences > Composition > Signatures.
  • Double-click on the signature you'd like to edit (or highlight the signature and click on the pencil icon at the bottom of the window).
  • Highlight the entire content of your signature.
  • Click on the "</>" button in the toolbar to edit the HTML tags and text.

If you are inserting an image into the signature and don't want it included as an attachment, it can be served remotely from a server. To configure this, add the moz-do-not-send="true" attribute to the img element. For example:

<img src="path/for/image.jpg" moz-do-not-send="true">

Setting a Default Signature

Each account or identity can contain one default signature. To set this, go to

On macOS: Postbox > Preferences > Accounts > [your account] > Identity

On Windows: Tools > Options > Accounts > [your account] > Identity

Then, find the Signature option and choose an existing signature in the list. Alternatively, to customize the signature per identity, click the Manage Identities... button below.

Signature Placement

In the Composition preferences, you can further customize the signature behavior. You can find these options by going to:

On macOS: Preferences > Accounts > [your account] > Composition

On Windows: Tools > Options > Accounts > [your account] > Composition & Addressing

Here, you can control how your signature is included in replies and forwards, and determine where the signature is placed when replying. To do this, simply change the option that reads "and place my signature" to below the quote or below my reply.
 
sig_2x.png

Adding Signatures to Messages

Postbox will automatically use your default signature when you create a new message. Use the Signatures toolbar icon to change the default signature, or to insert a new signature if one doesn't exist.

Inserting a Signature Using the Toolbar

Press and hold the Signature toolbar button to select your desired signature.

Inserting a Signature Using the Quick Bar

  1. When you’re writing a message in the Compose window, type command-L (macOS) or ctrl-L (Windows). The Quick Bar dialog opens.
  2. Start typing the name of the signature you want. Matching items appear as you type. To make it easy to get your hands on the thing you want, Postbox tells you whether each item is a signature, response, or topic.
  3. If the signature you want isn’t already selected, select it now with your mouse, or using your up/down arrow keys.
  4. Hit enter on your keyboard to insert the selected signature.

How to remove "--" Signature Delimiter

Go to Preferences | Options > Composition > Signatures and de-select the checkbox for "Add delimiter above the signature."

Troubleshooting

Signatures insert HTML into messages. Poorly formatted signatures insert bad HTML into messages and could cause a variety of problems.

Here are some tips on how to debug issues with signatures:

  1. Ensure that the signature settings are correct in Options > Preferences > Accounts > [your accounts] > Identity. This panel drives how and where the signature is being placed.
  2. Use Quote Mode instead of Summarize until you have your signatures working as expected. Summarize dynamically constructs the HTML for digest view in outbound messages, and during troubleshooting, this variable should be eliminated from the equation.
  3. As a test, try creating the simplest signature possible, just one line of text with no formatting. Does the simple signature work, whereas the other signature does not? If yes, then this could indicate an issue with the other signature(s).
  4. Ensure your signature HTML is correct by clicking on the </> button in the Signature editor.
  5. Do NOT insert an image into a signature that is behind your secure corporate firewall! It will not work, and it could prevent messages from sending.

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