owl - full control of your mail

mail flow

stage 1

Envelope/Headers

• public
• tcp 25
• ehlo
  • store sni, ehlo and ip
  • rbl and ehlo dns checks
  • policy by sni (tenant/domain/user)
• starttls
  • store the version/signature
• mail from
  • sender spf checks
• rcpt to
  • destination verification
  • tenant rules
  • user rules
  • reject with no quarantine
• data
  • stream original headers + body to queue storage (tenant/user customizable)
  • store metadata
  • initiate stage 2
• reject or return traceable queue id

stage 2

Queue/Routing

delivery transports