<div>
On the Mac I would check to see how they are set to send email. &nbsp;It wouldnt surprise me if they were set to use your Exchange 5.5. server for outbound SMTP mail.<br />
<br />
If that's the case they would need to direct it to your new Exchange 2003 server and you would need to add the Mac's IP address to the list of hosts allowed to relay mail (on the SMTP Virtual Server).<br />
<br />
Cheers,<br />
Erik
</div>


<div>
Hi,<br />
<br />
On your Mac, check the email client settings.<br />
First check the outgoing smtp settings. Make sure you you have the correct outgoing mail server hostname or ip address.<br />
<br />
If the settings on your Mac email client are correct, then the Exchange server Administator needs to make sure that he is allowing relaying from internal computers.<br />
<br />
You could also configure your email client to authenicate with outgoing email server. This is usually found in the advance settings of your email client. What you want to do is to configure your email client to give the outgoing email server your username and password so that you can authenticate when you are sending new email messages.<br />
<br />
nitadmin
</div>


<div>
I apologize for the late reply - other priorities. &nbsp;I checked the client settings on the MAC and found that the outgoing server is the ISPs server. &nbsp;I received an email from the ISP thru the user stating that they do not accept relays.<br />
If I'm using the ISPs server as the outgoing server, does the outgoing smtp email still hit my exchange box and/or spam appliance??
</div>


<div>
I don't know if this is going to be related, but we found out that the ISP has a webmail component. &nbsp;So, until we get the mail client resolved, we would provide the webmail solution. &nbsp;Now, we can't even get to the website on the MAC. &nbsp;No problem on a pc.<br />
<br />
Perhaps all the issues are on the MAC?!? &nbsp;I had our vendor check our firewall and that looks ok. &nbsp;The MACs firewall is turned off. &nbsp;Anyone have any other ideas??<br />
<br />
Oh, yah, thanks for clearing that up about bypassing the Exchange and SPAM appliance!!
</div>


<div>
Sound like you're on the right track troubleshooting issues with the Mac client. &nbsp;I'm not an expert on that platform but I would start with your basic troubleshooting; can you ping out, if you can is it an issue with the web browser only, etc....<br />
<br />
Good luck,<br />
Erik
</div>


<div>
Unfortunately, I'm still trying to resolve the issue. &nbsp;BUT, after thinking about it. &nbsp;You did answer my question which helps a lot!! &nbsp;Thanks!!
</div>


<div>
<div class="content wysiwyg-content">
I have a MAC on our network that uses email hosted from another company. &nbsp;They use MAC mail and send/receive from the hosting company. &nbsp;They can receive mail, but can not send out to internet mail clients.<br />
<br />
This was working prior to upgrading from exchange 5.5 to exchange 2003 in our internal network. &nbsp;Also, we had another MAC in a different location in our internal network that worked fine. &nbsp;Not sure where the problem lies.<br />
<br />
What is the email flow in this case?? &nbsp;How can I track the flow of the outgoing email from the MAC thru our network to see what's going on??<br />
<br />
Thanks!!
</div>
</div>


I have a MAC on our network that uses email hosted from another company.  They use MAC mail and send/receive from the hosting company.  They can receive mail, but can not send out to internet mail clients.

This was working prior to upgrading from exchange 5.5 to exchange 2003 in our internal network.  Also, we had another MAC in a different location in our internal network that worked fine.  Not sure where the problem lies.

What is the email flow in this case??  How can I track the flow of the outgoing email from the MAC thru our network to see what's going on??

Thanks!!

Outgoing SMTP from MAC

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

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.

Mac OS X

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.