Hi I need some help, this is killing me!! It was working fine and just decided to stop sending mail after a reboot one day. If I telnet to my server on port 587 I get 250-my.server 250-pipelining 250-size 10240000 250-vrfy 250-etrn 250-starttls 250-auth plain login 250-auth=plain login 250 8bitmime If I try and send mail through outlook on port 587 a username and password dialogue box comes up and it won't accept the authentication, even though I know it is right. Receiving mail is fine, and I can send to other domains I host. Can anyone help please?? Any more info needed??