matcherrc2perlfilter: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/matcherrc2perlfilter - from package: claws-mail-perl-filter

You may install the required package with command apt-get install {package}

Error in other languages:
matcherrc2perlfilter: bevel nie gevind nie
matcherrc2perlfilter: comandă negăsită
matcherrc2perlfilter: comando não encontrado
matcherrc2perlfilter: commande introuvable
matcherrc2perlfilter: command not found
matcherrc2perlfilter: käsku ei ole
matcherrc2perlfilter: không tìm thấy lệnh
matcherrc2perlfilter: komanda nerasta
matcherrc2perlfilter: Kommando nicht gefunden.
matcherrc2perlfilter: kommandot finns inte
matcherrc2perlfilter: komut yok
matcherrc2perlfilter: nie znaleziono polecenia
matcherrc2perlfilter: níor aimsíodh an t-ordú
matcherrc2perlfilter: no se encontró la orden
matcherrc2perlfilter: no s'ha trobat l'ordre
matcherrc2perlfilter: opdracht niet gevonden
matcherrc2perlfilter: parancs nem található
matcherrc2perlfilter: perintah tidak ditemukan
matcherrc2perlfilter: príkaz nenájdený
matcherrc2perlfilter: příkaz nenalezen
matcherrc2perlfilter: команда не найдена
matcherrc2perlfilter: командата не е открита
matcherrc2perlfilter: 命令找不到
matcherrc2perlfilter: コマンドが見つかりません