0a6419d7__virus_filter_for_SMTP_servers__Comments
[Token] XXWALL30 [Type] Keyword [SMTP server] XWall [Comments] 
I'm guessing this simply identifies the software and version running. Details are unknown.
ESMTP Keywords and Verbs (commands) Defined - Fluffy the SMTPGuardDog - spam and virus filter for SMTP servers
Comments