Can't email, get error "550 permit denied" message.

[Guest]

I'm using a few email addresses I've used for years, but suddenly I can't
send email to those addresses (msn.com and yahoo.com). I get:

The following recipient(s) could not be reached:

(I deleted my friend's name here) on 10/19/2005 9:28 AM
550 permit denied

What does that mean?

 

[Vince Averello [MVP-Outlook]]

Did you change anything recently (ISPs, server names, etc). Typically 550
errors are caused by SMTP (outgoing) mail servers rejecting mail for a
number of reasons (off network senders, etc)

 

[Guest]

I haven't changed anything that I know of - could I have changed something
without realizing it?

 

[Vince Averello [MVP-Outlook]]

Possibly but not likely...

What outgoing mail server are you using?

 

[Guest]

I am also getting the same error. But I am replying to an email that I just
received.
The actual error is
The message could not be sent because one of the recipients was rejected by
the server. The rejected e-mail address was '(e-mail address removed)'. Subject
'this is a test and only a test from XXXXX's better half!!!', Account:
'mail.comcast.net', Server: 'smtp.comcast.net', Protocol: SMTP, Server
Response: '550 permit denied', Port: 25, Secure(SSL): No, Server Error: 550,
Error Number: 0x800CCC79

I can send to other addresses but NOTHING from hotmail.com gets sent.
Ken

 

[Peter Foldes]

The cause of this error is due to the fact that all our SMTP servers require authentication. Please consult the "SMTP authentication settings" and "special settings for MSN, AT&T, AOL.com or Cox.com users