[anti-abuse-wg] When email verification behavior is abusive

Hi All, ESP and email relay services should verify recipient email addresses prior to sending bulk emails to any random email address. ESPs that simply start dumping bulk emails on victims often end up listed on RBLs for abusive behavior. But, when is verification emails themselves, spamvertising or email abuse? Our own email policy defines verification abuse as "more than 3 verify your email account" emails in the same 24 hour period and verify your email account emails lasting longer than five 24 hour periods. Do you think this is reasonable? Too reasonable? More? Less? If you receive say 4 "verify your email account" emails in 5 minutes, is this abuse? Andre