0a6419d7__virus_filter_for_SMTP_servers__Comments
[Token] VRFY [Type] Verb [Reference] RFC2821 [SMTP server] Required [Comments] 
Returns whether specified email address is a valid recipient. Often disabled to prevent spammers testing a dictionary list of names to build up a list of valid recipients.
ESMTP Keywords and Verbs (commands) Defined - Fluffy the SMTPGuardDog - spam and virus filter for SMTP servers
Comments