554 email error message: "reason: 554 mail server permanently rejected message": When you send an email, error message comes back with "reason: 554 mail server permanently rejected message". Why does this happen?
Usually, the "reason: 554 mail server permanently rejected message" email is received because the mail server thought your email is spam. Did you send an attachment - BINGO, that's your problem!

Even though the email server return message "reason: 554 mail server permanently rejected message" sounds severe, what you should do is change the extension of your attachment.
554 mail error: solution: Let's say you sent an '.htm' file to a friend. You got a "reason: 554 mail server permanently rejected message" error. I'd suggest using WINZIP to zip the file, therefore changing the extension and sending it again - and you're all set and should not get 554 mail server permanently rejected message (#5.3.0) error again.
sample "reason: 554 mail server permanently rejected message"

The original message was received at Mon, 18 Jul 2005 14:10:32 -0400 (EDT)
from xyz.com [***.***.***.***]

----- The following addresses had permanent fatal errors -----
<***@xyz.com>
(reason: 554 mail server permanently rejected message (#5.3.0))

----- Transcript of session follows -----
... while talking to smtp.***.net.:
>>> DATA
<<< 554 mail server permanently rejected message (#5.3.0)
554 5.0.0 Service unavailable