I have an Exchange 5.5 SP4 server servicing 40 Outlook 2000 clients. 1 client keeps getting the following error when sending email:
No transport provider was available for delivery to this recipient
This error happens randomly during 8 ? 5 hours to random users in his contact list. I have deleted his network account and mailbox. Re-created the network account and mailbox. And is still getting the error. I checked through his contact list and sent items to see the recipient address and it?s a standard SMTP address. firstname.lastname@example.org I can send email to the same contact from a different mailbox and it works fine. Please help.