Mail: Still no way to add a note?

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I was using MailTags, but not sure still works, just sent email.
Greatest flaw to me in all Mac Software: still no ability still to write on an email from a client.

Anyone have any ideas? Thanks.

Quote:

If you are running Mojave you need to install our new MailSuite app to get MailTags functionality. With Mojave, we have consolidated our 4 plugins into a single product with a single installer. You do not have to install all components of MailSuite if you only want to use MailTags but you do have to do the installation through the MailSuite app.