> another change in the email admin best practices discussion. For a short > while the network became clogged in bounce messages sent to both valid > and invalid addresses. Some of the invalid addresses even triggered > infinite loops of error messages. None of the servers I am familiar with > send bounce messages reporting invalid addresses any more. Our own > servers won't even tell us internally when they discard incoming > messages. SPAM quarantine is a thing of the past.
Seems like there's another possible way to handle messages to invalid addresses, though; the receiving SMTP server can simply reject the "RCPT TO" command with a 5xx error. This avoids backscatter but also lets well-behaved clients know that the destination address is invalid. AFAIK this is how Rackspace Email works (if you don't have a catch-all address configured). Ben -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
