Xbiff

{{no footnotes|date=October 2013}}

{{primary sources|date=October 2013}}

{{lowercase|xbiff}}

{{Infobox Software

| name = xbiff

| logo =

| screenshot = 250px

| caption = The xbiff utility running among other default X Window System applications.

| developer =

| latest_release_version =

| latest_release_date =

| operating_system = Unix-like

| genre = X Window System that shows a mailbox

| license =

| website = https://gitlab.freedesktop.org/xorg/app/xbiff

}}

xbiff is a small utility for the X Window System that shows a mailbox with its flag raised whenever the user has new e-mail. It is included in almost every X Window System.