charles marcus qqugswomediabrokerscom 2282008 andrew long sfajhsdgmailcom wrote youre proxying port 25 reconsider puts guests risk exposing login information attempt authenticate using existing configurations email clients blocking port 25 completely reasonable situation long guests use port 587 webmail proxied way implications closing port 25 public youre blocking port 25 relaying hotel guests still accept connections port 25 inbound mail public internet valid destinations authoritative understand 587 standard alt port changing something nonstandard standard submission port usually authenticated doesnt relay best regards charles fri 08 aug 2008 002218 0500 spam handling relayed mail