[quote user="Tena"]
Just today when trying to send email I started receiving this message, I contacted my IP and they say that I need a code to correct this?
Delivery has failed on the enclosed message for the following reasons reported either by
the mail delivery system on the mail relay host or by the local TCP/IP transport module:
550 Authentication required
Thanks,
Tena
[/quote]
Try checking the "Do a POP3 Check First" option on the Security tab of Tools => Internet Options -> Sending (SMTP).
<p>[quote user="Tena"]<font face="Arial">
<p>&nbsp;Just today when trying to send email I started receiving this message, I contacted my IP and they say that I need a code to correct this?<font face="Arial"></font></p>
<p align="left"><font face="Arial">Delivery has failed on the enclosed message for the following reasons reported either by </font></p>
<p align="left"><font face="Arial">the mail delivery system on the mail relay host or by the local TCP/IP transport module:</font></p><font face="Arial"></font>
<p>550 Authentication required</p>
<p mce_keep="true">&nbsp;</p>
<p>Thanks,</p>
<p>Tena</p>
<p mce_keep="true">&nbsp;</p>
<p mce_keep="true">&nbsp;</p></font>[/quote]</p><p>Try checking the "Do a POP3 Check First" option on the Security tab of Tools =&gt; Internet Options -&gt; Sending (SMTP).&nbsp;</p>