Mail bounces with #5.1.2 reply when sending from Outlook 2007, but not from OWA, sending to specific addreses, not all?
Posted on 2010-11-15
Hi, I have a user that gets bounces when he sends mail to a few (far from all) recipients from his Outlook 2007 client, but not from Outlook Web Access, connected to the same Exchange server 2003 (SBS). If the recipient is in his contacts the bounce doesnt give any information more than "unable to deliver". If the user deletes the recipient from contacts, the bounce reply with the <mail.xx.com #5.1.2>.
We have set up his user on another computer and the same thing happens.
Anyone got an idea what the problem is with the Outlook client?