Service abuse: Dropbox share from new domain

type.inbound

//  Dropbox actual sending infrastructure
and sender.email.email == "no-reply@dropbox.com"
and headers.auth_summary.spf.pass
and headers.auth_summary.dmarc.pass
and strings.ends_with(headers.auth_summary.spf.details.designator,
                      '.dropbox.com'
)

// the message needs to have a reply-to address
and length(headers.reply_to) > 0

// 
// This rule makes use of a beta feature and is subject to change without notice
// using the beta feature in custom rules is not suggested until it has been formally released
// 

// reply-to email address has never been sent an email by the org
and not beta.profile.by_reply_to().solicited

// do not match if the reply_to address has been observed as a reply_to address
// of a message that has been classified as benign
and not beta.profile.by_reply_to().any_messages_benign

// new reply-to domain
and any(headers.reply_to, network.whois(.email.domain).days_old < 30)