Hi, You could use procmail. This will act on the e-mail before it is delivered to an inbox. Depending on your needs the action can be to store the e-mail, to delete it, to send an automatic reply, etc.
I can give you few examples of recipes you need to put in your $HOME/.procmailrc. I do not see any reason you would want to accomplish that within mutt itself. Kind regards, Ionel On 15-05-2016, at 10h 30'49", Chris Green wrote about "Can one do something to an E-Mail without even opening/seeing it in mutt?" > As per the subject is it possible for mutt to do something to an > E-Mail in its inbox without the user seeing/doing anything at all? > > E.g. is there some sort of hook that can, for example, reply to or > delete an E-Mail from a specific address without any user interaction?