"adToOne" is not intended to be used for spamming. To prohibit such use, zaisoft append anti spamming function to adToOne.

Anti spamming

Each time you send mails to your recipient,  adToOne download latest spam definition data from zaisoft.com. You can not send mails if your mail matches definition data.

Anti mail bomb

You can not send plural mails to one recipient.

CAUSE