Native Mac mail composer works great with Interactive Grammarian speller and grammar check. But Airmail's mail composer (all versions including the latest 2.6.x) does not work with Grammarian interactive features. Sometimes, the focus of mail composer shifts and takes me away and out of the composer window where I am typing mail. Because of these two, I tend to go back to the native Mac mail. Airmail is a great program and I hope these two issues can be fixed so I can continue using it. I am using both iMacs and a Mac Book pro laptop under El-Capitan OS. But I don't think these issues have anything to do with El-Capitan OS as I have had these problems with Airmail since its early versions till now. Grammarian link is: http://linguisoft.com/