@mpdesouza @monsieuricon I guess you want to send all replies at once? Indeed 'hkml' has no good feature for such things. I do such kind of batched replying with below workaround.
After writing a reply, 'hkml' asks you if you really want to send it, or not. If you say no, 'hkml' will ask you if you want to save and tag it as 'drafts'. In the case, if you try to reply to the mail again, 'hkml' finds the draft reply and ask you if you want to continue writing the draft. You can also list all drafts using 'hkml list drafts' and continue writing it, using the menu.
So when I want to review all patches and then send all comments at once, I save my drafts for each patch, and iterate multiple times on each draft for adding more comments on the drafts. Once I think all replies are ready to go, I send those one by one, but with no more draft updates.
Maybe I can add a new hkml feature for sending all drafts for a given thread at once.
#hkml