The 1.7.7 version of HTML Email Signature for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac app is a product of Element26, Inc. We recommend checking the downloaded files with any free antivirus. The software lies within Business Tools, more precisely Project Management.
From the developer:
Neither Microsoft Outlook 2011, 2016, 2019, nor 365 for Mac offer creation of email signatures from HTML. Only a rich-text editing box is provided, without the ability for more customization.
HTML Email Signature - Outlook enhances these capabilities by allowing customized creation of email signatures from HTML. Simply type in a name for your signature, add your HTML, and your signature is created! A button to preview the HTML is also available.
You may want to check out more software for Mac, such as Email Grabber 2, Signature or eMail Extractor, which might be related to HTML Email Signature.
Document management
E-mail Tools