|
Home > Archive > microsoft.public.exchange2000.admin > October 2002 > External Pop3 clients can't send email through virual server
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
External Pop3 clients can't send email through virual server
|
|
|
| Mate of mine is trying to configure his exchange server to support
external pop3 client - pop 3 works fine but sending causes the
standard
The message could not be sent because one of the recipients was
rejected by the server. The rejected e-mail address was 'xxx@xxx.com'.
Subject 'xxx', Account: 'mail.computer-support.net.au', Server:
'mail.computer-support.net.au', Protocol: SMTP, Server Response: '550
5.7.1 Unable to relay for xxx@xxx.com', Port: 25, Secure(SSL): No,
Server Error: 550, Error Number: 0x800CCC79
Now this behaviour is expected since relaying on the virtual SMTP
server should not be permitted.
Tried a few options already just thinking about any security issues
for anything that may work I have read about pop before relay. Does
exchange 2000 support this and if not what would be the best and most
secure option available to me ?
Hans
| |
| Ward Flowers [MS] 2002-10-05, 8:24 pm |
| You would need to check the box on your pop3 client "My outgoing mail server
requires authentication"
--
Ward Flowers
Exchange Support Professional
****** Disclaimer ******
This posting is provided "AS IS" with no warranties, and confers no rights.
Note: Please do NOT reply to this e-mail address. It is used for newsgroup
purposes only.
"Hans" <hansie1967@xyzhotmail.com> wrote in message
news:2dfeoug0eci1au773qd1e4rf4
u99bk62n8@4ax.com...
> Mate of mine is trying to configure his exchange server to support
> external pop3 client - pop 3 works fine but sending causes the
> standard
>
> The message could not be sent because one of the recipients was
> rejected by the server. The rejected e-mail address was 'xxx@xxx.com'.
> Subject 'xxx', Account: 'mail.computer-support.net.au', Server:
> 'mail.computer-support.net.au', Protocol: SMTP, Server Response: '550
> 5.7.1 Unable to relay for xxx@xxx.com', Port: 25, Secure(SSL): No,
> Server Error: 550, Error Number: 0x800CCC79
>
> Now this behaviour is expected since relaying on the virtual SMTP
> server should not be permitted.
>
> Tried a few options already just thinking about any security issues
> for anything that may work I have read about pop before relay. Does
> exchange 2000 support this and if not what would be the best and most
> secure option available to me ?
>
> Hans
| |
| Bryan Nyce 2002-10-05, 8:24 pm |
| Hans wrote:
> Mate of mine is trying to configure his exchange server to support
> external pop3 client - pop 3 works fine but sending causes the
> standard
>
> The message could not be sent because one of the recipients was
> rejected by the server. The rejected e-mail address was 'xxx@xxx.com'.
> Subject 'xxx', Account: 'mail.computer-support.net.au', Server:
> 'mail.computer-support.net.au', Protocol: SMTP, Server Response: '550
> 5.7.1 Unable to relay for xxx@xxx.com', Port: 25, Secure(SSL): No,
> Server Error: 550, Error Number: 0x800CCC79
>
> Now this behaviour is expected since relaying on the virtual SMTP
> server should not be permitted.
>
> Tried a few options already just thinking about any security issues
> for anything that may work I have read about pop before relay. Does
> exchange 2000 support this and if not what would be the best and most
> secure option available to me ?
>
> Hans
Exchange supports this. By default, only those who can authenticate to the
Exchange server can relay. So, have the client configure his email settings
so that his Outgoing Mail Server (SMTP) requires authentication. He can use
the same credentials he uses to get his mail with POP3.
Incidentally - is the client going through a PIX? If so, you will need to
turn off the MailGuard feature on the PIX, since it will not allow the AUTH
command to go through, and cause the authentication to fail, resulting in
the same 550 error...
Bryan Nyce
|
|
|
|
|