Hi, I've the impression that notmuch-reply doesn't respect the Reply-To field: I've an email with a Reply-To field. But when I execute "notmuch reply id:<msg-id>", the To: field is set to the From: field of the original email and not to the Reply-To: field. Here is the original email I want to reply to: $ notmuch show --format=json --entire-thread=false --body=false "id:565be5e1.X5p1I6XirRudvMa6%seaside@rmod.inria.fr" | json_pp [ [ [ { [...] "headers" : { "To" : "rmod@inria.fr", "Reply-To" : "rmod@inria.fr", "From" : "seaside@rmod.inria.fr", "Subject" : "[rmod] [Mm10s] 2015-11-30", "Date" : "Mon, 30 Nov 2015 07:00:01 +0100" }, [...] Here is the result of notmuch-reply: $ notmuch reply --reply-to=sender --format=json "id:565be5e1.X5p1I6XirRudvMa6%seaside@rmod.inria.fr" | json_pp { "reply-headers" : { "References" : "<565be5e1.X5p1I6XirRudvMa6%seaside@rmod.inria.fr>", "Subject" : "Re: [rmod] [Mm10s] 2015-11-30", "To" : "seaside@rmod.inria.fr", "From" : "Damien Cassou <damien.cassou@inria.fr>", "In-reply-to" : "<565be5e1.X5p1I6XirRudvMa6%seaside@rmod.inria.fr>" }, "original" : { "tags" : [ [...] As you can see, the "To" field of the reply is not set from the original Reply-To: field, but from the original From: field. Can anyone help me please? -- Damien Cassou http://damiencassou.seasidehosting.st "Success is the ability to go from one failure to another without losing enthusiasm." --Winston Churchill