I found an interesting problem in Exchange 2007 SP2 Outlook Web Access. Since I had problems with mail flow, all the mails that I sent went to the drafts folder. When I tried to delete mails from drafts folder it deleted two, and after clicking delete button one more time it restored all previously deleted mails. Check video…
Reason: [{LED=250 2.1.5 RESOLVER.GRP.Expanded; distribution list expanded};{MSG=};{FQDN=};{IP=};{LRT=}]
If you got this error checking the mail flow for a distribution group, it means the distribution group is closed and only internal senders can send e-mail to this group. When outside user sends e-mail to this group you get Reason: [{LED=250 2.1.5 RESOLVER.GRP.Expanded; distribution list expanded};{MSG=};{FQDN=};{IP=};{LRT=}] Set Delivery for this group to internal and external users and your problem will be solved.