0a6419d7__virus_filter_for_SMTP_servers__Comments
[Token] XLSMTP-DATASIZE [Type] Keyword [SMTP server] LSMTP [Comments] 
I'm guessing it's linked with L-Soft's LISTSERV programme. There are probably associated keywords. Details are unknown.
ESMTP Keywords and Verbs (commands) Defined - Fluffy the SMTPGuardDog - spam and virus filter for SMTP servers
Comments