Hello!
For some reason all our MAC (OSX 10.4) clients using Entourage have stopped sending e-mails. They can receive e-mails fine, and can reply to these with no problems either, but if a user tries to send a new mail (even if it's to someone they have just received one from), the mail appears to send but it doesn't arrive at the destination. This is regardless of whether it is an internal mail or external. So there are no error messages and everything looks like it's been sent.
I've checked over the Exchange 2003 box, there is nothing in the queues for any mail process and nothing in the event logs on the box to suggest anything major is going wrong.
At first I thought it was the one user, so I've checked DNS on their Mac, deleted the Entourage settings and set the mail up from scratch, but it now looks like it's all our Mac users. The Mac's are local users, and everything has been working fine until Tuesday of this week, though I can't pinpoint the exact day as none of our Mac users had reported a problem. It was only when a Windows users saw me having lunch they told me they'd not got a mail from someone they were expecting that the issue came to light.
The only thing that has changed in the environment is that we updated GFI Mail Essentials a few weeks back, but I've checked GFI logs and everything is being processed without errors in there too! So GFI is picking up the mail from the Mac clients, reporting that it's been processed OK (and it's not in the junk mailbox either) and then seems to disappear.
There is also nothing wrong with the users mail accounts, as a work around we've got them all using Outlook Web Access with no problems.
Has anyone any ideas please? There are three of us (2 Windows and one Mac engineer) just scratching our heads going over everything in our heads and we just can't see what has suddenly gone wrong!
Cheers
Ian
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