Is this new behaviour in an existing installation, or unexpected behaviour in a new installation or upgrade?
I’m running MS Office 2010 and I authenticate myself (User ID & Password) for incoming mail and also for anything I send. This behaviour is different to my experiences with MS Office 2003 and Office ’97 and it may be something to do with how the e-mail account is set up in Office 2010.
I actually like the compulsory prompt for User ID & Password when sending as it adds that additional level of authentication.
Cheers
Dennis