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Hi I have a client that has recently purchased an optus usb mobile broadband stick. ( os XP Home)<br />
Using outlook express 6 she can send and receive no problems, however when she tries to reply to emails as appose to creating a new message she gets the following message &nbsp;&quot;The message could not be sent because one of the recipients was rejected by the server&quot;<br />
&nbsp;Error number: 0x800CC79<br />
The server settings are correct. &nbsp;The return addresses are valid (she has used them for ages)<br />
She can use the reply function when logged on to web mail.<br />
Has anyone any suggestions?<br />
<br />

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Hi I have a client that has recently purchased an optus usb mobile broadband stick. ( os XP Home)
Using outlook express 6 she can send and receive no problems, however when she tries to reply to emails as appose to creating a new message she gets the following message  "The message could not be sent because one of the recipients was rejected by the server"
 Error number: 0x800CC79
The server settings are correct.  The return addresses are valid (she has used them for ages)
She can use the reply function when logged on to web mail.
Has anyone any suggestions?



error 0x800cc79 in outlook express when trying to reply to emails using optus mobile broadband

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

An email client, email reader or more formally mail user agent (MUA) is a computer program used to access and manage a user's email. A web application that provides message management, composition, and reception functions is sometimes also considered an email client, but more commonly referred to as webmail.