Unknown mailer error 126

["Francis A. Vidal" <francis @ usls . edu>]

after i finished setting up the latest majordomo, i got this message when
i send mails to it. i have sendmail 8.9.1. i've searched the archives and
i also found this same question posted but it has no answer. maybe you
have now...

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u s l s N E T   university of st. la salle, bacolod city, philippines
. . . . . . .   PGP key at ftp://ftp.usls.edu/pub/pgpkeys/francis.pgp
francis vidal   tel. nos. (6334).435.2324 / 433.3526