0a6419d7__virus_filter_for_SMTP_servers__Comments
[Token] XDATASIZE [Type] Keyword [SMTP server] LSMTP [Comments] 
I'm guessing it's an obsolete form of XLSMTP-DATASIZE
ESMTP Keywords and Verbs (commands) Defined - Fluffy the SMTPGuardDog - spam and virus filter for SMTP servers
Comments