I thought that I had my relay server working, but all that it did was queue the messages. I get a message in the log that says that the connection to my relay host timed out. I thought that it was probably a port issue. I'm not sure that ATT will allow me to send on port 25, so I changed the port to 2525 in main.cf. the relayhost line reads relayhost = outbound.mailhop.org:2525. Now I'm back to getting a message that says that I need to authenticate to the relay server. I have deleted the sasl_passwd.db file and ran portmap hash:/etc/postfix/sasl_passwd to recreate the db file. I'm still getting the 550 error on all outbound messages. Any suggestions on what to look at next?