I uploaded a no-change rebuild of msmtp to my PPA and had it build against -proposed (https://launchpad.net/%7Ebroder/+archive/ppa/+sourcepub/538848/+listing-archive-extra). I then installed that package and the gsasl in -proposed on my machine, and was able to send GSSAPI-authenticated e-mail.
I'm not sure of what other testing I could do.
I uploaded a no-change rebuild of msmtp to my PPA and had it build against -proposed (https:/ /launchpad. net/%7Ebroder/ +archive/ ppa/+sourcepub/ 538848/ +listing- archive- extra). I then installed that package and the gsasl in -proposed on my machine, and was able to send GSSAPI- authenticated e-mail.
I'm not sure of what other testing I could do.