EnvoirmentWindows 2003Sharepoint 2007I configured all the things which define in Microsoft TechNet (Configure Incoming e-mail settings (Office Share Point Server))When i create a mail enabled document library in a team site (in the Incoming E-Mail) section i entered email address mail@mossserv.domain.com and save the document library created after that when i Create Incoming E-Mail Settings : in Document Library (in the Incoming E-Mail Section) i entered the same email address mail@mossserv.domain.com the site is given the error as followsUnable to assign this e-mail address to the list, because the address is in use.since before i am not using the same address.How i can fix this problem.or how i can check where i put this email address wronglyRgdsTeeJayI deleted all the document library by my site and created again but the problem is still there even any ID i mentioned in Create Incoming E-Mail settings i can not utilized again the same error comming.Also i unistall Share Point 2007 and delete SharePoint Database then i install again when i configure Document Library the same error is appeared it's mean this is not the error of Share point 2007Please help Also i install windows server 2003 but the problem is still is there any budy can help me about this error TeeJay