Make message view's Back link set the mailbox page

This allows to go back and forth between the mailbox view and the
message view.

References: https://todo.sr.ht/~sircmpwn/koushin/22

1 files changed, 1 insertions, 1 deletions

diff --git a/imap.go b/imap.go
index 9c83fc7..9081689 100644
--- a/imap.go
+++ b/imap.go
@@ -213,7 +213,7 @@ func listMessages(conn *imapclient.Client, mboxName string, page int) ([]imapMes
 
 	mbox := conn.Mailbox()
 	to := int(mbox.Messages) - page*messagesPerPage
-	from := to - messagesPerPage
+	from := to - messagesPerPage + 1
 	if from <= 0 {
 		from = 1
 	}