Problem replying email

A user when replying emails (from MS Outlook 2003) to some of the internet
users, it always undelivered and bounce back (refer to below for the
errors). But when user manually keyin the email address, it sent
successfully. It always happened on these 3 domain email accounts.

The e-mail system was unable to deliver the message, but did not
report a specific reason. Check the address and try again. If it still
fails, contact your system administrator.

<smtp02.nafa.edu.sg #5.0.0 smtp;550 5.0.0 ... Use MXes or
authenticate yourself>





There was a SMTP communication problem with the recipient's email server.
Please contact your system administrator.

<smtp02.nafa.edu.sg #5.5.0 smtp;553 sorry, you must authenticate
and be authorised to use this service (#5.7.1)>





There was a SMTP communication problem with the recipient's
email server. Please contact your system administrator.

<smtp02.nafa.edu.sg #5.5.0 smtp;530 Authentication required>

Brian
Fri Mar 28 05:35:46 PDT 2008

2Sweet <cmchong20@yahoo.com> wrote:

> A user when replying emails (from MS Outlook 2003) to some of the
> internet users, it always undelivered and bounce back (refer to below
> for the errors). But when user manually keyin the email address, it
> sent successfully. It always happened on these 3 domain email
> accounts.

Are you using POP/SMTP accounts and do those account definitions
authenticate to the outgoing server?
--
Brian Tillman [MVP-Outlook]

2Sweet
Fri Mar 28 10:09:14 PDT 2008

Using SMTP account. Problem only when reply to these 3 domain email address.
But when manually type the email address, it sent successfully.


"Brian Tillman" <tillman1952@yahoo.com> wrote in message
news:%23uk8zCNkIHA.5660@TK2MSFTNGP02.phx.gbl...
> 2Sweet <cmchong20@yahoo.com> wrote:
>
>> A user when replying emails (from MS Outlook 2003) to some of the
>> internet users, it always undelivered and bounce back (refer to below
>> for the errors). But when user manually keyin the email address, it
>> sent successfully. It always happened on these 3 domain email
>> accounts.
>
> Are you using POP/SMTP accounts and do those account definitions
> authenticate to the outgoing server?
> --
> Brian Tillman [MVP-Outlook]

Brian
Mon Mar 31 10:38:11 PDT 2008

2Sweet <cmchong20@yahoo.com> wrote:

> Using SMTP account. Problem only when reply to these 3 domain email
> address. But when manually type the email address, it sent
> successfully.

You didn't answer all of the question. Are the accounts authenticating to
the outgoing servers?
--
Brian Tillman [MVP-Outlook]

2Sweet
Wed Apr 02 19:50:56 PDT 2008

the accounts do not require to authenticate to the outgoing server.

"Brian Tillman" <tillman1952@yahoo.com> wrote in message
news:%23lbKLl1kIHA.5368@TK2MSFTNGP04.phx.gbl...
> 2Sweet <cmchong20@yahoo.com> wrote:
>
>> Using SMTP account. Problem only when reply to these 3 domain email
>> address. But when manually type the email address, it sent
>> successfully.
>
> You didn't answer all of the question. Are the accounts authenticating to
> the outgoing servers?
> --
> Brian Tillman [MVP-Outlook]

Brian
Thu Apr 03 05:04:46 PDT 2008

2Sweet <cmchong20@yahoo.com> wrote:

> the accounts do not require to authenticate to the outgoing server.

The error message you received clearly indicates otherwise.
--
Brian Tillman [MVP-Outlook]