Service abuse: DocSend share from an unsolicited reply-to address

type.inbound

// Legitimate DocSend sending infratructure
and sender.email.email == "no-reply@docsend.com"
and headers.auth_summary.spf.pass
and headers.auth_summary.dmarc.pass

// 
// 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 address has never sent an email to the org
and beta.profile.by_reply_to().prevalence == "new"

// 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