My default email client (Spark) not recognized by Acrobat

Because Adobe Acrobat integrates the use of both, the file explorer and the web browser of the operating system, it may be possible that if the email client was not  set as the efault email client systemwide, it may not show as a recognized email client application in Acrobat.

However, the key observations here are:

• How to properly default an email client if you have more than one email client installed in your mac other than Apple Mail. Verify if the steps shown here were followed: https://www.imore.com/how-set-mac-app-default-when-opening-file

• Is there any step of the registration with Spark need to be enabled/activated with the service provider? How about reinstalling or repairing the original installation? These are tips that other macOS and  MS Windows users have followed when they get the same problem with MS Outlook, for example.

• Spark email client is advertised as a full desktop email client when in fact it looks more to me as a webmail client collaboration email app with support to integrate  other third-party email clients. If you look in their support page : https://sparkmailapp.com/help/185-cannot-set-up-a-custom-email-address.html  It clearly states that it doesn't support POP3 protocol, so that is basically a webmail client... not a full desktop email client. Perhaps this is where all this confusion came in.

• If my observation is correct, you need to check with the  Acrobat Preferences Reference Guide (that I posted above, but look into the Webmail (Custom) section here: https://www.adobe.com/devnet-docs/acrobatetk/tools/PrefRef/Macintosh/WebMail.html#WebMail(Custom)  how to enable webmail and how to enable a customized webmailclient for Acrobat. The current supported webmail clients are Gmail, and Yahoo.

• The same goes for the senMail integration . See here: https://www.adobe.com/devnet-docs/acrobatetk/tools/PrefRef/Macintosh/SendMail.html#MailIntegration) It seems like  this is necessary to enable third-party support in Acrobat.  But the sendMail service in Acrobat only supports Gmail, Yahoo, and LotusNotes.

• As you can see in my bullet above,  there is no full desktop integration with Spark.

• You'll need the IMAP, SMTP and profile ID information from the Spark email service to configure this Plist setting appropriately as a custom Webmail client (not as sendMail email client).

Hopefully if you guys take the time to read you may find the solution. But better, yet, contact Spark tech support directly and see what the creator of this app have to say in reagrds to Acrobat.