Another mail problem

[garrettroyce]

Used 'configure mail client' link in CPanel to setup Outlook Express. Got error '451 blah blah blah try again later'
tried ever configuration for express with the same result:
can receive but not send mail.

Ping to 'mail.garrettroyce.x10hosting.com' is successful.
IP address: 74.86.133.219

details from outlook:

Incoming mail (IMAP): mail.garrettroyce.x10hosting.com port 143
Outgoing mail (SMTP): mail.garrettroyce.x10hosting.com port 25
account name: garrettr (this is my cpanel name)
password: XXXXXXXXXX(this is my correct password)
DO NOT log on using secure password authentication
My outgoing server require authentication (same as incoming)

SSL disabled on incoming and outgoing

error message:
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was 'XXXXXXXXXXXX@hotmail.com'. Subject 'asdf', Account: 'x10hosting', Server: 'mail.garrettroyce.x10hosting.com', Protocol: SMTP, Server Response: '451 Temporary local problem - please try later', Port: 25, Secure(SSL): No, Server Error: 451, Error Number: 0x800CCC79
Edit:
bump
Edit:
As if I needed more evidence my mail is not working, no matter where I send an e-mail from, when I check my x10hosting email account using the online webmail, I never receive the message. I've sent 3 or 4 in the past 24 hours and none have been received.
Edit:
do a search for "receive mail" there are a ton of closed, unresolved posts.
Edit:
IRC chat isn't working:

Connecting...
Unable to connect : java.net.ConnectException : Connection timed out: connect
Edit:
Are there any mods capable of working on this issue?