---
name: "cron-deja-vu"
section: "1"
platform: "linux"
package: "cron-deja-vu"
version: "0.4-5.1"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/cron-deja-vu"
---

# cron-deja-vu(1)

is a mail filter designed to handle recurring cron mails

## NAME

cron-deja-vu - is a mail filter designed to handle recurring cron mails

## SYNOPSIS

**cron-deja-vu** *\<options\>*

## DESCRIPTION

cron-deja-vu is a filter for cron generated mail.  it expects mails which only differ in small amounts. Matching is done, by matching line by line against already learned mails.  If a mail is matched, the header X-deja-vu is set to yes. Otherwise the header is set to, no and if specified the header X-deja-vuline will  contain lines of the mail which did not match.

## OPTIONS

- **--version**

  show program's version number and exit

- **-h**, **--help**

  show this help message and exit

- **-m** \<filename of mail\>, **--mail=**\<filename of mail\>

  test against mail from filename

- **-a** \<Maildir\>, **--add=**\<Maildir\>

  build database from maildir

- **-s** \<number of lines\>, **--show=**\<number of lines\>

  show first \<num\> of not matched lines in header

- **-d**, **--debug**

  show debug output