> ----- The following addresses had permanent fatal errors -----
> "|/usr/bin/tee /mail.txt"
>     (expanded from: <robot@fmplus.cz>)
>
>    ----- Transcript of session follows -----
> sh: tee not available for sendmail programs
> 554 "|/usr/bin/tee /mail.txt"... Service unavailable

Vas sendmail pouziva nejspis SMRSH (SendMail Restricted SHell), ktery
znemoznuje spousteni neznamych binarek. Cokoliv chcete takto spoustet
musi byt zkopirovano nebo prilinkovano v adresari /etc/smrsh

*
Pro interpretaci programu z .forward se pouziva misto sh smrsh (viz man
smrsh). Bud muzete nahradit v /etc/sendmail.cf volani smrsh primo sh, a
nebo prislusny skript povolte spousteni smrsh (viz man page).

Jo, a existuje konference sendmail@linux.cz
*
Pokud chce uzivatel volneji pracovat s prichozimi maily, mel by vyuzit
moznosti lokalniho dorucovaciho programu (procmail) misto toho, aby
"drazdil" samotny sendmail (coz je potencialne nebezpecne a proto
omezene).